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Geometrical tolerances play a very important role in the functionality and assembly of parts made of light alloys for aeronautical applications. These parts are frequently machined in dry conditions. Under these conditions, the tool wear becomes one of the most important variables that influence geometrical tolerances. In this work, the influence of tool wear on roundness, straightness and cylindricity of dry-turned UNS A97075 alloy has been analyzed. The tool wear and form deviations evolution as a function of the cutting parameters and the cutting time has been assessed. In addition, the predominant tool wear mechanisms have been checked. The experimental results revealed that the indirect adhesion wear (BUL and BUE) was the main tool-wear mechanism, with the feed being the most influential cutting parameter. The combination of high feed and low cutting speed values resulted in the highest tool wear. The analyzed form deviations showed a general trend to increase with both cutting parameters. The tool wear and the form deviations tend to increase with the cutting time only within the intermediate range of feed tested. As the main novelty, a relationship between the cutting parameters, the cutting time (and, indirectly, the tool wear) and the analyzed form deviations has been found.
Francisco Trujillo Vilches; Sergio Martín Béjar; Carolina Bermudo Gamboa; Manuel Herrera Fernández; Lorenzo Sevilla Hurtado. Influence of Tool Wear on Form Deviations in Dry Machining of UNS A97075 Alloy. Metals 2021, 11, 958 .
AMA StyleFrancisco Trujillo Vilches, Sergio Martín Béjar, Carolina Bermudo Gamboa, Manuel Herrera Fernández, Lorenzo Sevilla Hurtado. Influence of Tool Wear on Form Deviations in Dry Machining of UNS A97075 Alloy. Metals. 2021; 11 (6):958.
Chicago/Turabian StyleFrancisco Trujillo Vilches; Sergio Martín Béjar; Carolina Bermudo Gamboa; Manuel Herrera Fernández; Lorenzo Sevilla Hurtado. 2021. "Influence of Tool Wear on Form Deviations in Dry Machining of UNS A97075 Alloy." Metals 11, no. 6: 958.
As a typology of cultural heritage, a wide range of singularities must to be taken into account when analysing industrial heritage assets. Graphical resources have been usually employed in heritage assets research. Nowadays, Unmanned Aerial Vehicles (UAVs) offer the possibility to obtain images of complex and difficult access areas that cannot be observed on the ground. Furthermore, aerial images allow to analyse heritage assets as a whole. Therefore, in this work, different photographs and videos has been carried out in the San Joaquin sugar cane factory and in the Aguila aqueduct, located in Nerja (Spain). These images have been used to analyse both assets as a set. Different indirect measurements on the factory chimney and irrigation water pond were taken. A Strengths, Weaknesses, Opportunities, and Threats (SWOT) about the use of UAV graphic applications in heritage assets was developed. Finally, the possibilities of conventional photograph technologies and UAV application were compared. Using UAVs allows more image acquisition possibilities than conventional systems. However, both technologies can be complemented and applied together when analysing heritage assets.
Sergio Martín-Béjar; Juan Claver; Miguel A. Sebastián; Lorenzo Sevilla. Graphic Applications of Unmanned Aerial Vehicles (UAVs) in the Study of Industrial Heritage Assets. Applied Sciences 2020, 10, 8821 .
AMA StyleSergio Martín-Béjar, Juan Claver, Miguel A. Sebastián, Lorenzo Sevilla. Graphic Applications of Unmanned Aerial Vehicles (UAVs) in the Study of Industrial Heritage Assets. Applied Sciences. 2020; 10 (24):8821.
Chicago/Turabian StyleSergio Martín-Béjar; Juan Claver; Miguel A. Sebastián; Lorenzo Sevilla. 2020. "Graphic Applications of Unmanned Aerial Vehicles (UAVs) in the Study of Industrial Heritage Assets." Applied Sciences 10, no. 24: 8821.
Fatigue behavior takes special relevance in structural parts for aircraft due to safety reasons. Despite its environmental advantages, dry machining of these parts may negatively affect their surface integrity, which may lead to a reduction in fatigue life. Nevertheless, there is a lack of research focused on the analysis of the cutting parameters influence on fatigue behavior in dry machining of aeronautical aluminum alloys, in spite of its importance. Therefore, in this work, an analysis of the cutting speed and feed influence on fatigue behavior of dry turned UNS A97075-T6 alloy is presented. The stress-fatigue life curves have been obtained and corrected according to the applied cutting parameters values. Additionally, the surface roughness and two macro-geometrical deviations (cylindricity and concentricity) have been controlled. The experimental results have revealed that fatigue life is reduced when high values of cutting speed and feed are combined. Finally, a parametric potential equation for fatigue life, as a function of the load and the cutting parameters, has been developed. The relation has been obtained for the theoretical fracture section and, as the main novelty, corrected for the real one.
Sergio Martín Béjar; Francisco Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado. Fatigue Behavior Parametric Analysis of Dry Machined UNS A97075 Aluminum Alloy. Metals 2020, 10, 631 .
AMA StyleSergio Martín Béjar, Francisco Javier Trujillo Vilches, Carolina Bermudo Gamboa, Lorenzo Sevilla Hurtado. Fatigue Behavior Parametric Analysis of Dry Machined UNS A97075 Aluminum Alloy. Metals. 2020; 10 (5):631.
Chicago/Turabian StyleSergio Martín Béjar; Francisco Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado. 2020. "Fatigue Behavior Parametric Analysis of Dry Machined UNS A97075 Aluminum Alloy." Metals 10, no. 5: 631.
In this work, an analysis of the cutting speed and feed influence on surface roughness and microhardness of UNS A97075-T6 alloy, turned under dry conditions, was carried out. The results were compared before and after a corrosion process. The influence of these cutting parameters on each of these variables was analyzed, as well as the possible interrelation between them. The microgeometrical deviations showed a general trend to increase with feed. However, no significant modifications were observed as a function of the cutting speed. This trend was softer after the corrosion process, due to the surface alterations produced by pitting corrosion, which resulted in higher dispersion of the experimental data. In addition, a surface microhardness increment was observed in all samples, after machining and before corrosion, regardless of the cutting parameter values. The experimental results revealed that the mechanical effects, produced by the feed, should not be neglected against the thermal effects, produced by the cutting speed, within the range of the tested cutting speed. Finally, the corrosion process negatively affected the microhardness, but it was not possible to establish a direct relationship between the cutting parameters, surface roughness, and microhardness after a corrosion process.
Sergio Martín-Béjar; Francisco Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado. Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy. Applied Sciences 2020, 10, 1049 .
AMA StyleSergio Martín-Béjar, Francisco Javier Trujillo Vilches, Carolina Bermudo Gamboa, Lorenzo Sevilla Hurtado. Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy. Applied Sciences. 2020; 10 (3):1049.
Chicago/Turabian StyleSergio Martín-Béjar; Francisco Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado. 2020. "Cutting Speed and Feed Influence on Surface Microhardness of Dry-Turned UNS A97075-T6 Alloy." Applied Sciences 10, no. 3: 1049.
Nowadays, localized forming operations, such as incremental forming processes, are being developed as an alternative to conventional machining or forming techniques. An indentation process is the main action that takes places in these forming activities, allowing small, localized deformations. It is essential to have the knowledge of the material behavior under the punch and the transmitted forces to achieve correct control of the entire procedure. This paper presents the work carried out with the digital image correlation (DIC) technique applied to the study of the material flow that takes place under an indentation process. The material flow analysis is performed under 2D and 3D conditions, establishing the methodology for the calibration and implementation for each alternative. Two-dimensional DIC has been proven to be a satisfactory technique compared with the 3D method, showing results in good agreement with experimental tests and models developed by the finite element method. Notwithstanding, part of the indented material flows under the punch, emerging on the front surface and generating a dead zone that can only be addressed with a 3D technique. So, the main objective is to carry out a comparison between the 2D and 3D techniques to identify if the 3D application could be mandatory for this type of process. Also, a 2D–3D mix analysis is proposed for study cases in which it is necessary to know the material flow in that specific area of the workpiece.
Carolina Bermudo Gamboa; Sergio Martín-Béjar; F. Javier Trujillo Vilches; G. Castillo López; Lorenzo Sevilla Hurtado. 2D–3D Digital Image Correlation Comparative Analysis for Indentation Process. Materials 2019, 12, 4156 .
AMA StyleCarolina Bermudo Gamboa, Sergio Martín-Béjar, F. Javier Trujillo Vilches, G. Castillo López, Lorenzo Sevilla Hurtado. 2D–3D Digital Image Correlation Comparative Analysis for Indentation Process. Materials. 2019; 12 (24):4156.
Chicago/Turabian StyleCarolina Bermudo Gamboa; Sergio Martín-Béjar; F. Javier Trujillo Vilches; G. Castillo López; Lorenzo Sevilla Hurtado. 2019. "2D–3D Digital Image Correlation Comparative Analysis for Indentation Process." Materials 12, no. 24: 4156.
Macro-geometrical deviations play a very important role in the functionality and reliability of structural parts for aircraft. The use of environmentally friendly techniques, such as dry machining, may negatively affect these deviations. Despite its importance, there is a lack of research that analyzes them as a function of the cutting parameters in the case of aluminum alloys for aeronautical purpose. In this work, the cutting speed and feed influence on several macro-geometrical deviations (parallelism, straightness, circular run-out, roundness, concentricity, total circular run-out and cylindricity) in dry turning of UNS A97075 alloy was analyzed. The main novelty of this work lies in the use of high slenderness parts used in further fatigue tests. The results showed that feed seems to be the most influential parameter in most of the deviations studied. In addition, the parts with lower rigidity exhibited higher sensitivity to change with the cutting parameters. Finally, different parametric models were proposed to obtain the geometrical deviations as a function of the cutting parameters.
Sergio Martín Béjar; Francisco Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado. Parametric Analysis of Macro-Geometrical Deviations in Dry Turning of UNS A97075 (Al-Zn) Alloy. Metals 2019, 9, 1141 .
AMA StyleSergio Martín Béjar, Francisco Javier Trujillo Vilches, Carolina Bermudo Gamboa, Lorenzo Sevilla Hurtado. Parametric Analysis of Macro-Geometrical Deviations in Dry Turning of UNS A97075 (Al-Zn) Alloy. Metals. 2019; 9 (11):1141.
Chicago/Turabian StyleSergio Martín Béjar; Francisco Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado. 2019. "Parametric Analysis of Macro-Geometrical Deviations in Dry Turning of UNS A97075 (Al-Zn) Alloy." Metals 9, no. 11: 1141.
In this work, the analysis of the cutting speed and feed rate influence on tool wear and cutting forces in Ti6Al4V alloy dry machining is presented. The study has been focused on the machining in a transient state. The tool wear mechanisms, tool wear intensity and cutting forces evolution have been analyzed as a function of the cutting parameters. Experimental results show that the main cutting force amplitude exhibits a general trend to increase with both cutting parameters. Crater wear was more evident at high cutting speeds, whereas flank wear was present on the whole interval of the cutting parameters analyzed. Furthermore, the cutting speed shows a slightly higher influence on crater wear and the feed rate shows a higher influence on flank wear. Finally, several experimental parametric models have been obtained. These models allow predicting the evolution of crater and flank tool wear, as well as the cutting forces, as a function of the cutting parameters. Additionally, a model that allows monitoring the tool wear on the machining transient state as a function of the main cutting force amplitude has been developed.
Yezika Sánchez Hernández; F. Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado; Sánchez Hernández; Trujillo Vilches; Bermudo Gamboa; Sevilla Hurtado. Online Tool Wear Monitoring by the Analysis of Cutting Forces in Transient State for Dry Machining of Ti6Al4V Alloy. Metals 2019, 9, 1014 .
AMA StyleYezika Sánchez Hernández, F. Javier Trujillo Vilches, Carolina Bermudo Gamboa, Lorenzo Sevilla Hurtado, Sánchez Hernández, Trujillo Vilches, Bermudo Gamboa, Sevilla Hurtado. Online Tool Wear Monitoring by the Analysis of Cutting Forces in Transient State for Dry Machining of Ti6Al4V Alloy. Metals. 2019; 9 (9):1014.
Chicago/Turabian StyleYezika Sánchez Hernández; F. Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado; Sánchez Hernández; Trujillo Vilches; Bermudo Gamboa; Sevilla Hurtado. 2019. "Online Tool Wear Monitoring by the Analysis of Cutting Forces in Transient State for Dry Machining of Ti6Al4V Alloy." Metals 9, no. 9: 1014.
Any research in any field needs an initial background, and in the same way, any decision should be supported by previous knowledge and study of the problem and its context. In the case of the industrial heritage, both the study of the typology and the decision making about the actions of conservation and reutilization of its assets must be based on a deep knowledge of the set of elements that the typology includes. All of that refers to the corresponding territory being analyzed, since the intensity and productive tradition will be different between each territory, region, or country. In that context, this paper represents the continuation of the main research line of the authors, and exposes their efforts to develop a useful tool for the study, management, and cultural promotion of the assets related to industrial heritage in Spain through the development of a multi-criteria catalogue of assets. Thus, based on the initial catalogue developed by some of the authors, this paper significantly increases the number of assets considered. In addition, it includes new classification criteria, reviews the observed trends, and establishes the future lines of work and suitable strategies for these kinds of initiatives.
Juan Claver; Amabel García-Domínguez; Lorenzo Sevilla; Miguel A. Sebastián. A Multi-Criteria Cataloging of the Immovable Items of Industrial Heritage of Andalusia. Applied Sciences 2019, 9, 275 .
AMA StyleJuan Claver, Amabel García-Domínguez, Lorenzo Sevilla, Miguel A. Sebastián. A Multi-Criteria Cataloging of the Immovable Items of Industrial Heritage of Andalusia. Applied Sciences. 2019; 9 (2):275.
Chicago/Turabian StyleJuan Claver; Amabel García-Domínguez; Lorenzo Sevilla; Miguel A. Sebastián. 2019. "A Multi-Criteria Cataloging of the Immovable Items of Industrial Heritage of Andalusia." Applied Sciences 9, no. 2: 275.
The coatings with fluoropolymer resins rich in fluorinated ethylene propylene (FEP) and polytetrafluoroethylene (PTFE) are applied as anti-adherent coatings on aluminum–magnesium substrates for use in food containers. In many cases, due to wear, they must be stripped for the application of a new coating on the same substrate. There are several processes for this: blasting, plasma, pyrolysis, chemical processes, laser, high pressure water, and combinations of these. This work focuses on the characterization of the main factors that condition the FEP coating removal process by a continuous wave (CW) Nd:YAG laser, and on the determination of the efficiency of this type of technology used for this purpose. Stripping surface per unit of time and energy consumption per unit area has been determined among other efficiency indicators. Regarding the characterization of the coating object of study, its thickness, surface roughness, contact angle, microhardness and absorbance-reflectance responses have been determined, and the results have been compared with those obtained in the case of PTFE. In addition, to evaluate the mechanical damage caused in the substrate after coating removal by (CW) Nd:YAG laser, the tensile strength, Vickers hardness, Ra and Rz roughness, and the substrate thickness have been measured and analyzed.
Óscar Rodríguez-Alabanda; Pablo E. Romero; Carlos Soriano; Lorenzo Sevilla; Guillermo Guerrero-Vaca. Study on the Main Influencing Factors in the Removal Process of Non-Stick Fluoropolymer Coatings Using Nd:YAG Laser. Polymers 2019, 11, 123 .
AMA StyleÓscar Rodríguez-Alabanda, Pablo E. Romero, Carlos Soriano, Lorenzo Sevilla, Guillermo Guerrero-Vaca. Study on the Main Influencing Factors in the Removal Process of Non-Stick Fluoropolymer Coatings Using Nd:YAG Laser. Polymers. 2019; 11 (1):123.
Chicago/Turabian StyleÓscar Rodríguez-Alabanda; Pablo E. Romero; Carlos Soriano; Lorenzo Sevilla; Guillermo Guerrero-Vaca. 2019. "Study on the Main Influencing Factors in the Removal Process of Non-Stick Fluoropolymer Coatings Using Nd:YAG Laser." Polymers 11, no. 1: 123.
"Academic Lives in Industrial Engineering" is one of the different initiatives developed by PATRIF, a Working Group of the Manufacturing Engineering Society (MES) / Sociedad de Ingeniería de Fabricación (SIF). This activity intends to create a sound recording archive with interview format, in order to disseminate the trajectory of great professors of the Spanish Industrial Engineers Faculties. It seeks to preserve and bring closer the professors experiences and the personality to the new generations, with a story told in first person. This work aims to show the this activity characteristics, presenting the interviewees profile, pointing out the most outstanding aspects of their interventions, carrying out an analysis of the broadcasted interviews and assessing their impact. Despite other engineering areas that are covered in this initiative, present work limit its analysis to the professors group who have developed their academic and professional life within the Manufacturing Engineering. Also, this study wants to serve as tribute and recognition to their trajectories and dedication to the Spanish Manufacturing Engineering.
L. Sevilla; Juan Claver; M.A. Sebastián. Sound recordings of leading professors of Spanish Manufacturing Engineering. Analysis of contents. Procedia Manufacturing 2019, 41, 690 -697.
AMA StyleL. Sevilla, Juan Claver, M.A. Sebastián. Sound recordings of leading professors of Spanish Manufacturing Engineering. Analysis of contents. Procedia Manufacturing. 2019; 41 ():690-697.
Chicago/Turabian StyleL. Sevilla; Juan Claver; M.A. Sebastián. 2019. "Sound recordings of leading professors of Spanish Manufacturing Engineering. Analysis of contents." Procedia Manufacturing 41, no. : 690-697.
In this work, new analytical method‐based computer‐aided manufacturing (CAM) software tool developed for educational purposes is introduced. The software has been conceived for the designing, analysis, and optimization of the multi‐step wiredrawing industrial process. The software was used during four sessions and the student's feedback has been measured by a usability/suitability survey. This paper presents the complete study of the previous situation in the Area of Manufacturing Processes in the Superior Polytechnic School (University of Cordoba, Spain). The positive results from the students encouraged us for the integration of new practical activities supported in the use of this type of software tools, to reinforce the professional skills of students, and show that the new CAM software presents a great potential for competency‐based learning objectives.
Oscar Rodríguez-Alabanda; Guillermo Guerrero-Vaca; Pablo E. Romero; Lorenzo Sevilla. Educational software tool based on the analytical methodology for design and technological analysis of multi-step drawing processes. Computer Applications in Engineering Education 2018, 27, 38 -48.
AMA StyleOscar Rodríguez-Alabanda, Guillermo Guerrero-Vaca, Pablo E. Romero, Lorenzo Sevilla. Educational software tool based on the analytical methodology for design and technological analysis of multi-step drawing processes. Computer Applications in Engineering Education. 2018; 27 (1):38-48.
Chicago/Turabian StyleOscar Rodríguez-Alabanda; Guillermo Guerrero-Vaca; Pablo E. Romero; Lorenzo Sevilla. 2018. "Educational software tool based on the analytical methodology for design and technological analysis of multi-step drawing processes." Computer Applications in Engineering Education 27, no. 1: 38-48.
The Ti6Al4V alloy is included in the group of difficult-to-cut materials. Segmented chips are generated for a wide range of cutting parameters. This kind of chip geometry leads to the periodic variation of machining forces, tool vibrations, and work part-tolerance inaccuracies. Therefore, the analysis of chip morphology and geometry becomes a fundamental machinability criterion. However, few studies propose experimental parametric relationships that allow predicting chip-geometry evolution as a function of cutting parameters. In this work, an experimental analysis of the influence of cutting speed and feed rate on various chip-geometric parameters in dry machining of the Ti6Al4V alloy was carried out. In addition, the chip morphology and chip microstructure were studied. A clear dependence of certain chip-geometric parameters on the cutting parameters studied was found. From the experimental data, several parametric relationships were developed. These relationships were able to predict the evolution of different geometric parameters as a function of cutting speed and feed, within the tested range of values. The differences between the proposed models and the experimental data were also highlighted. These parametric equations allowed quantifying the value of parameters in which the trend was clear.
Yezika Sánchez Hernández; Francisco Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado. Experimental Parametric Relationships for Chip Geometry in Dry Machining of the Ti6Al4V Alloy. Materials 2018, 11, 1260 .
AMA StyleYezika Sánchez Hernández, Francisco Javier Trujillo Vilches, Carolina Bermudo Gamboa, Lorenzo Sevilla Hurtado. Experimental Parametric Relationships for Chip Geometry in Dry Machining of the Ti6Al4V Alloy. Materials. 2018; 11 (7):1260.
Chicago/Turabian StyleYezika Sánchez Hernández; Francisco Javier Trujillo Vilches; Carolina Bermudo Gamboa; Lorenzo Sevilla Hurtado. 2018. "Experimental Parametric Relationships for Chip Geometry in Dry Machining of the Ti6Al4V Alloy." Materials 11, no. 7: 1260.
In this work, the design and implementation of a set of practical activities in a flexible manufacturing cell is exposed, as well as the teaching methodology used, both in programming cell manually (guided programming) or remotely (off-line, using simulation software). These activities have been designed for a progressive learning, starting with simple tasks, like programming a robot arm movement between different points in space, and concluding with more complex tasks, such as programming of palletizing cycles or manufacturing a part by machining.
F.J. Trujillo; R. Dorado; R. López-García; Lorenzo Sevilla; Lorenzo Sevilla Hurtado. Design and Implementation of a Practical Learning Methodology for the Control and Programming of a Flexible Manufacturing Cell. Materials Science Forum 2017, 903, 1 -8.
AMA StyleF.J. Trujillo, R. Dorado, R. López-García, Lorenzo Sevilla, Lorenzo Sevilla Hurtado. Design and Implementation of a Practical Learning Methodology for the Control and Programming of a Flexible Manufacturing Cell. Materials Science Forum. 2017; 903 ():1-8.
Chicago/Turabian StyleF.J. Trujillo; R. Dorado; R. López-García; Lorenzo Sevilla; Lorenzo Sevilla Hurtado. 2017. "Design and Implementation of a Practical Learning Methodology for the Control and Programming of a Flexible Manufacturing Cell." Materials Science Forum 903, no. : 1-8.
The present work shows the material flow analysis in indentation by the numerical two dimensional Finite Elements (FEM) method and the experimental two-dimensional Digital Image Correlation (DIC) method. To achieve deep indentation without cracking, a ductile material, 99% tin, is used. The results obtained from the DIC technique depend predominantly on the pattern conferred to the samples. Due to the absence of a natural pattern, black and white spray painting is used for greater contrast. The stress-strain curve of the material has been obtained and introduced in the Finite Element simulation code used, DEFORM™, allowing for accurate simulations. Two different 2D models have been used: a plain strain model to obtain the load curve and a plain stress model to evaluate the strain maps on the workpiece surface. The indentation displacement load curve has been compared between the FEM and the experimental results, showing a good correlation. Additionally, the strain maps obtained from the material surface with FEM and DIC are compared in order to validate the numerical model. The Von Mises strain results between both of them present a 10–20% difference. The results show that FEM is a good tool for simulating indentation processes, allowing for the evaluation of the maximum forces and deformations involved in the forming process. Additionally, the non-contact DIC technique shows its potential by measuring the superficial strain maps, validating the FEM results.
Carolina Bermudo; Lorenzo Sevilla; Germán Castillo López. Material Flow Analysis in Indentation by Two-Dimensional Digital Image Correlation and Finite Elements Method. Materials 2017, 10, 674 .
AMA StyleCarolina Bermudo, Lorenzo Sevilla, Germán Castillo López. Material Flow Analysis in Indentation by Two-Dimensional Digital Image Correlation and Finite Elements Method. Materials. 2017; 10 (6):674.
Chicago/Turabian StyleCarolina Bermudo; Lorenzo Sevilla; Germán Castillo López. 2017. "Material Flow Analysis in Indentation by Two-Dimensional Digital Image Correlation and Finite Elements Method." Materials 10, no. 6: 674.
The application of incremental processes in the manufacturing industry is having a great development in recent years. The first stage of an Incremental Forming Process can be defined as an indentation. Because of this, the indentation process is starting to be widely studied, not only as a hardening test but also as a forming process. Thus, in this work, an analysis of the indentation process under the new Modular Upper Bound perspective has been performed. The modular implementation has several advantages, including the possibility of the introduction of different parameters to extend the study, such as the friction effect, the temperature or the hardening effect studied in this paper. The main objective of the present work is to analyze the three hardening models developed depending on the material characteristics. In order to support the validation of the hardening models, finite element analyses of diverse materials under an indentation are carried out. Results obtained from the Modular Upper Bound are in concordance with the results obtained from the numerical analyses. In addition, the numerical and analytical methods are in concordance with the results previously obtained in the experimental indentation of annealed aluminum A92030. Due to the introduction of the hardening factor, the new modular distribution is a suitable option for the analysis of indentation process.
Carolina Bermudo; Lorenzo Sevilla; Francisco Martín; Francisco Javier Trujillo. Hardening Effect Analysis by Modular Upper Bound and Finite Element Methods in Indentation of Aluminum, Steel, Titanium and Superalloys. Materials 2017, 10, 556 .
AMA StyleCarolina Bermudo, Lorenzo Sevilla, Francisco Martín, Francisco Javier Trujillo. Hardening Effect Analysis by Modular Upper Bound and Finite Element Methods in Indentation of Aluminum, Steel, Titanium and Superalloys. Materials. 2017; 10 (5):556.
Chicago/Turabian StyleCarolina Bermudo; Lorenzo Sevilla; Francisco Martín; Francisco Javier Trujillo. 2017. "Hardening Effect Analysis by Modular Upper Bound and Finite Element Methods in Indentation of Aluminum, Steel, Titanium and Superalloys." Materials 10, no. 5: 556.
In this work, the study of the influence of cutting parameters (cutting speed, feed, and depth of cut) on the tool wear used in in the dry turning of cylindrical bars of the UNS A97075 (Al-Zn) alloy, has been analyzed. In addition, a study of the physicochemical mechanisms of the secondary adhesion wear has been carried out. The behavior of this alloy, from the point of view of tool wear, has been compared to similar aeronautical aluminum alloys, such as the UNS A92024 (Al-Cu) alloy and UNS A97050 (Al-Zn) alloy. Furthermore, a first approach to the measurement of the 2D surface of the adhered material on the rake face of the tool has been conducted. Finally, a parametric model has been developed from the experimental results. This model allows predicting the intensity of the secondary adhesion wear as a function of the cutting parameters applied.
Francisco Javier Trujillo; Lorenzo Sevilla; Mariano Marcos. Experimental Parametric Model for Indirect Adhesion Wear Measurement in the Dry Turning of UNS A97075 (Al-Zn) Alloy. Materials 2017, 10, 152 .
AMA StyleFrancisco Javier Trujillo, Lorenzo Sevilla, Mariano Marcos. Experimental Parametric Model for Indirect Adhesion Wear Measurement in the Dry Turning of UNS A97075 (Al-Zn) Alloy. Materials. 2017; 10 (2):152.
Chicago/Turabian StyleFrancisco Javier Trujillo; Lorenzo Sevilla; Mariano Marcos. 2017. "Experimental Parametric Model for Indirect Adhesion Wear Measurement in the Dry Turning of UNS A97075 (Al-Zn) Alloy." Materials 10, no. 2: 152.
Aluminum alloys are widely used in the manufacturing of structural parts for aircraft, frequently in combination with other materials such as CFRP (Carbon Fiber Reinforced Polymer), to form FML (Fiber Metal Laminates) structures (CFRP/Al). The dry machining of these structures presents several problems, some of which are related to chip evacuation, either when machining aluminum alloys as an isotropic material, or during hybridization with composites. In this work, a study of the way in which cutting parameters influence the chip morphology in the dry machining of UNS A97075-T6 (Al-Zn) and UNS A92024-T3 (Al-Cu) alloys, is performed. Thus, different geometric parameters of the chip morphology have been obtained, and their evolution with feed has been analysed. Finally, the different relationships which occur between these geometric parameters and feed, have been obtained. These relationships allow a prediction of the evolution of some of the geometric parameters of the chip, as a function of feed.
Francisco Javier Trujillo Vilches; Lorenzo Sevilla Hurtado; Francisco Martín Fernández; Carolina Bermudo Gamboa. Analysis of the Chip Geometry in Dry Machining of Aeronautical Aluminum Alloys. Applied Sciences 2017, 7, 132 .
AMA StyleFrancisco Javier Trujillo Vilches, Lorenzo Sevilla Hurtado, Francisco Martín Fernández, Carolina Bermudo Gamboa. Analysis of the Chip Geometry in Dry Machining of Aeronautical Aluminum Alloys. Applied Sciences. 2017; 7 (2):132.
Chicago/Turabian StyleFrancisco Javier Trujillo Vilches; Lorenzo Sevilla Hurtado; Francisco Martín Fernández; Carolina Bermudo Gamboa. 2017. "Analysis of the Chip Geometry in Dry Machining of Aeronautical Aluminum Alloys." Applied Sciences 7, no. 2: 132.
C. Bermudo; F. Martín; L. Sevilla. Temperature implementation for the Modular Upper Bound application in indentation processes. Procedia Manufacturing 2017, 13, 243 -250.
AMA StyleC. Bermudo, F. Martín, L. Sevilla. Temperature implementation for the Modular Upper Bound application in indentation processes. Procedia Manufacturing. 2017; 13 ():243-250.
Chicago/Turabian StyleC. Bermudo; F. Martín; L. Sevilla. 2017. "Temperature implementation for the Modular Upper Bound application in indentation processes." Procedia Manufacturing 13, no. : 243-250.
L. Sevilla; M.A. Sebastián; J. Claver. Design, analysis and evaluation of the activity “10 images about …” for the identification and study of assets of the Spanish industrial heritage. Procedia Manufacturing 2017, 13, 1413 -1420.
AMA StyleL. Sevilla, M.A. Sebastián, J. Claver. Design, analysis and evaluation of the activity “10 images about …” for the identification and study of assets of the Spanish industrial heritage. Procedia Manufacturing. 2017; 13 ():1413-1420.
Chicago/Turabian StyleL. Sevilla; M.A. Sebastián; J. Claver. 2017. "Design, analysis and evaluation of the activity “10 images about …” for the identification and study of assets of the Spanish industrial heritage." Procedia Manufacturing 13, no. : 1413-1420.
Tribological conditions can change drastically during heavy loaded regimes as experienced in metal forming; this is especially critical when lubrication can only be applied at the early stage of the process because the homogeneous lubricant layer can break along the die-workpiece interface. In these cases, adopting a constant friction factor for the lubricant-surface pair may not be a valid assumption. This paper presents a procedure based on the use of dual friction factor maps to determine friction factors employed in heavy loaded regimes. A finite element (FE) simulation is used to obtain the friction factor map for the alloy UNS A96082. Experiments were conducted using four lubricants (aluminum anti-size, MoS2 grease, silicone oil, and copper paste) to determine the actual friction curves. The experimental procedure is based on the application of lubricant only at the beginning of the first stage of ring compression, and not at intermediate stages as is usual in typical ring compression tests (RCTs). The results show that for small reductions (rh < 20%), the conventional RCT can be applied because the tribological conditions remain similar. For large reductions (rh > 20%), it is recommended to obtain an average value of the friction factor for every lubricant-surface pair in the range of deformation considered.
Ana María Camacho; Mariano Veganzones; Juan Claver; Francisco Martín; Lorenzo Sevilla; Miguel Ángel Sebastián. Determination of Actual Friction Factors in Metal Forming under Heavy Loaded Regimes Combining Experimental and Numerical Analysis. Materials 2016, 9, 751 .
AMA StyleAna María Camacho, Mariano Veganzones, Juan Claver, Francisco Martín, Lorenzo Sevilla, Miguel Ángel Sebastián. Determination of Actual Friction Factors in Metal Forming under Heavy Loaded Regimes Combining Experimental and Numerical Analysis. Materials. 2016; 9 (9):751.
Chicago/Turabian StyleAna María Camacho; Mariano Veganzones; Juan Claver; Francisco Martín; Lorenzo Sevilla; Miguel Ángel Sebastián. 2016. "Determination of Actual Friction Factors in Metal Forming under Heavy Loaded Regimes Combining Experimental and Numerical Analysis." Materials 9, no. 9: 751.