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Nanopattern replication of complex structures by plastic injection is a challenge that requires simulations to define the right processing parameters. Previous work managed to simulate replication for single cavities in 2D and 3D, showing high performance requirements of CPU to simulate periodic trenches in 2D. This paper presents two ways to approach the simulation of replication of complex 3D hydrophobic surfaces. The first approach is based on previous CFD Ansys Fluent and compared to FE based CFD Polyflow software for the analysis of laminar flows typical in polymer processing and glass forming as well as other applications. The results showed that Polyflow was able to reduce computing time from 72 h to only 5 min as desired in the project. Furthermore, simulations carried out with Polyflow showed that higher injection and mold temperature lead to better replication of hydrophobicity in agreement with the experiments. Polyflow simulations are proved to be a good tool to define process parameters such as temperature and cycle times for nanopattern replication.
Tomás Baldi-Boleda; Ehsan Sadeghi; Carles Colominas; Andrés García-Granada. Simulation Approach for Hydrophobicity Replication via Injection Molding. Polymers 2021, 13, 2069 .
AMA StyleTomás Baldi-Boleda, Ehsan Sadeghi, Carles Colominas, Andrés García-Granada. Simulation Approach for Hydrophobicity Replication via Injection Molding. Polymers. 2021; 13 (13):2069.
Chicago/Turabian StyleTomás Baldi-Boleda; Ehsan Sadeghi; Carles Colominas; Andrés García-Granada. 2021. "Simulation Approach for Hydrophobicity Replication via Injection Molding." Polymers 13, no. 13: 2069.
The Fused-Deposition Modelling (FDM) technique has transformed the manufacturing discipline by simplifying operational processes and costs associated with conventional technologies, with polymeric materials being indispensable for the development of this technology. A lack of quantification of viscoelastic/plastic behavior has been noted when addressing FDM parts with Polyetherimide (PEI), which is currently being investigated as a potential material to produce functional end-products for the aerospace and health industry. Primary and secondary creep along with stress relaxation tests have been conducted on FDM PEI specimens by applying stresses from 10 to 40 MPa for 100 to 1000 min. Specimens were 3D printed by varying the part build orientation, namely XY, YZ, and XZ. Creep results were fitted to the Generalized Time Hardening equation (GTH), and then this model was used to predict stress relaxation behavior. FDM PEI parts presented an isotropic creep and stress relaxation performance. The GTH model was proven to have a significant capacity to fit viscoelastic/plastic performances for each single build orientation (r > 0.907, p < 0.001), as well as a tight prediction of the stress relaxation behavior (r > 0.998, p < 0.001). Averaged-orientation coefficients for GTH were also closely correlated with experimental creep data (r > 0.958, p < 0.001) and relaxation results data (r > 0.999, p < 0.001). FDM PEI parts showed an isotropic time-dependent behavior, which contrasts with previous publications arguing the significant effect of part build orientation on the mechanical properties of FDM parts. These findings are strengthened by the high correlation obtained between the experimental data and the averaged-coefficient GTH model, which has been proven to be a reliable tool to predict time-dependent performance in FDM parts.
A. G. Salazar-Martín; A. A. García-Granada; G. Reyes; G. Gomez-Gras; J. M. Puigoriol-Forcada. Time-Dependent Mechanical Properties in Polyetherimide 3D-Printed Parts Are Dictated by Isotropic Performance Being Accurately Predicted by the Generalized Time Hardening Model. Polymers 2020, 12, 678 .
AMA StyleA. G. Salazar-Martín, A. A. García-Granada, G. Reyes, G. Gomez-Gras, J. M. Puigoriol-Forcada. Time-Dependent Mechanical Properties in Polyetherimide 3D-Printed Parts Are Dictated by Isotropic Performance Being Accurately Predicted by the Generalized Time Hardening Model. Polymers. 2020; 12 (3):678.
Chicago/Turabian StyleA. G. Salazar-Martín; A. A. García-Granada; G. Reyes; G. Gomez-Gras; J. M. Puigoriol-Forcada. 2020. "Time-Dependent Mechanical Properties in Polyetherimide 3D-Printed Parts Are Dictated by Isotropic Performance Being Accurately Predicted by the Generalized Time Hardening Model." Polymers 12, no. 3: 678.
Glass forming to produce perfume bottles with specific thickness distribution profiles is based on trial and error and requires several tests in production line. These tests are expensive and time‐consuming, which increases time to market. The use of a numerical model aims to reduce the number of prototypes by performing virtual tests of the mold equipment and the process conditions. This article presents results of numerical simulations of the blow and blow forming process to predict glass thickness distribution. Correlation of the simulation results of the glass temperature with experimental infrared measurements on the glass skin and experimental validation of glass forming simulations and influence of the blank mold cavity in the thickness distributions of perfume bottles are provided. Finally validation of the results of axisymmetrical and three‐dimensional models for axisymmetric bottles defining a useful technique to use the right blank mold for desired thickness distribution while reducing the trial and error testing. This article is protected by copyright. All rights reserved.
Adrià Biosca; Salvador Borrós; Vicenç Pedret Clemente; Matthew R. Hyre; Andrés‐Amador García Granada. Numerical and experimental study of blow and blow for perfume bottles to predict glass thickness and blank mold influence. International Journal of Applied Glass Science 2019, 10, 569 -583.
AMA StyleAdrià Biosca, Salvador Borrós, Vicenç Pedret Clemente, Matthew R. Hyre, Andrés‐Amador García Granada. Numerical and experimental study of blow and blow for perfume bottles to predict glass thickness and blank mold influence. International Journal of Applied Glass Science. 2019; 10 (4):569-583.
Chicago/Turabian StyleAdrià Biosca; Salvador Borrós; Vicenç Pedret Clemente; Matthew R. Hyre; Andrés‐Amador García Granada. 2019. "Numerical and experimental study of blow and blow for perfume bottles to predict glass thickness and blank mold influence." International Journal of Applied Glass Science 10, no. 4: 569-583.
Nanostructured gratings fabricated on silicon chips have been successfully transferred to polypropylene plastic parts by means of injection molding. Different sets of experiments were carried out along with a repeatability analysis in order to study the effect in the replication of process parameters such as maximum injection pressure, injection time, charge and polymer temperature, geometric factors such as width and separation between lines of the gratings and flow direction as well as demolding conditions. Among all factors, the one with a larger effect is the separation between consecutive trenches, which was studied in detail through Computational Fluid Dynamics simulations. In addition, a previously not reported sinking effect in the nanostructured area and a shrinking of the pattern period were characterized and simulated.
Olga Muntada-López; Jordi Pina-Estany; Carles Colominas; Jordi Fraxedas; Francesc Pérez-Murano; Andres García-Granada. Replication of nanoscale surface gratings via injection molding. Micro and Nano Engineering 2019, 3, 37 -43.
AMA StyleOlga Muntada-López, Jordi Pina-Estany, Carles Colominas, Jordi Fraxedas, Francesc Pérez-Murano, Andres García-Granada. Replication of nanoscale surface gratings via injection molding. Micro and Nano Engineering. 2019; 3 ():37-43.
Chicago/Turabian StyleOlga Muntada-López; Jordi Pina-Estany; Carles Colominas; Jordi Fraxedas; Francesc Pérez-Murano; Andres García-Granada. 2019. "Replication of nanoscale surface gratings via injection molding." Micro and Nano Engineering 3, no. : 37-43.
The aim of this paper is to explore the watertightness behaviour for high pressure applications using Multi Jet Fusion technology and polyamide 12 as a material. We report an efficient solution for manufacturing functional prototypes and final parts for water pressure applications and provide manufacturing rules for engineers in the pressurized product development process for up to 10 MPa of nominal pressure. The research findings show manufacturers the possibility of using additive manufacturing as an alternative to traditional manufacturing. Water leakage was studied using different printing orientations and wall thicknesses for a range of pressure values. An industrial ball valve was printed and validated with the ISO 9393 standard as also meeting tolerance requirements. This paper is a pioneering approach to the additive manufacturing of high-performance fluid handling components. This approach solves the problem of leakage caused by porosity in additive manufacturing technologies.
Sergio Morales-Planas; Joaquim Minguella-Canela; Jordi Lluma-Fuentes; Jose Antonio Travieso-Rodriguez; Andrés-Amador García-Granada. Multi Jet Fusion PA12 Manufacturing Parameters for Watertightness, Strength and Tolerances. Materials 2018, 11, 1472 .
AMA StyleSergio Morales-Planas, Joaquim Minguella-Canela, Jordi Lluma-Fuentes, Jose Antonio Travieso-Rodriguez, Andrés-Amador García-Granada. Multi Jet Fusion PA12 Manufacturing Parameters for Watertightness, Strength and Tolerances. Materials. 2018; 11 (8):1472.
Chicago/Turabian StyleSergio Morales-Planas; Joaquim Minguella-Canela; Jordi Lluma-Fuentes; Jose Antonio Travieso-Rodriguez; Andrés-Amador García-Granada. 2018. "Multi Jet Fusion PA12 Manufacturing Parameters for Watertightness, Strength and Tolerances." Materials 11, no. 8: 1472.
The aim of this paper is to explore the watertightness behaviour for high pressure applications using Multijetfusion technology and polyamide 12 as a material. It reports an efficient solution for manufacturing functional prototypes and final parts for water pressure applications. It provides manufacturing rules to engineers in the pressurized product development process up to 10 MPa of nominal pressure. The research findings show manufacturers the possibility of using additive manufacturing as an alternative to traditional manufacturing. Water leakage was studied using different printing orientations and wall thickness for a range of pressure values. An industrial ball valve was printed and validated with the ISO 9393 standard also meeting tolerance requirements. This paper is a pioneering approach to the additive manufacturing of high performance fluid handling components. This approach solves the problem of leakage caused by porosity in additive manufacturing technologies
Sergio Morales-Planas; Joaquim Minguella-Canela; Jordi Lluma-Fuentes; Jose Antonio Travieso-Rodriguez; Andrés-Amador García-Granada. Multijetfusion Manufacturing Parameters for Watertightness, Strength and Tolerances. 2018, 1 .
AMA StyleSergio Morales-Planas, Joaquim Minguella-Canela, Jordi Lluma-Fuentes, Jose Antonio Travieso-Rodriguez, Andrés-Amador García-Granada. Multijetfusion Manufacturing Parameters for Watertightness, Strength and Tolerances. . 2018; ():1.
Chicago/Turabian StyleSergio Morales-Planas; Joaquim Minguella-Canela; Jordi Lluma-Fuentes; Jose Antonio Travieso-Rodriguez; Andrés-Amador García-Granada. 2018. "Multijetfusion Manufacturing Parameters for Watertightness, Strength and Tolerances." , no. : 1.
This paper presents an experimental investigation on the influence of process parameters such as part orientation, air gap and number of contours along with their interactions on the creep behaviour of fused deposition modelling (FDM) processed polycarbonate (PC) parts. Due to the lack of creep curve data with parts processed by FDM, this research gives a first quantitative approach to the time-dependent mechanical properties. This study not only varies significant process parameters viz., part build orientation, raster to raster air gap and number of contours, but also applies different loads to the samples to further understand primary and secondary creep behaviour for PC, providing the creep curves. Furthermore, two mathematical models are used to fit the experimental data, which can be used in numerical modelling. The first model is the well-documented and commonly used Bailey-Norton equation. As a second model, the fractional Voigt Maxwell in series (FVMS) is proposed to use. This model applies fractional calculus to reduce the number of parameters to be calculated. Conclusions obtained about how process parameters affect the creep behaviour are in agreement with previous research in mechanical properties of FDM parts.
Antonio Gabino Salazar Martín; Marco A. Pérez; Andrés-Amador García-Granada; Guillermo Reyes; Josep M. Puigoriol-Forcada. A study of creep in polycarbonate fused deposition modelling parts. Materials & Design 2018, 141, 414 -425.
AMA StyleAntonio Gabino Salazar Martín, Marco A. Pérez, Andrés-Amador García-Granada, Guillermo Reyes, Josep M. Puigoriol-Forcada. A study of creep in polycarbonate fused deposition modelling parts. Materials & Design. 2018; 141 ():414-425.
Chicago/Turabian StyleAntonio Gabino Salazar Martín; Marco A. Pérez; Andrés-Amador García-Granada; Guillermo Reyes; Josep M. Puigoriol-Forcada. 2018. "A study of creep in polycarbonate fused deposition modelling parts." Materials & Design 141, no. : 414-425.
Eric Dimla; Josep Rull-Trinidad; Andres Amador García-Granada; Guillermo Reyes. Thermal Comparison of Conventional and Conformal Cooling Channel Designs for a Non-Constant Thickness Screw Cap. Journal of the Korean Society for Precision Engineering 2018, 35, 95 -101.
AMA StyleEric Dimla, Josep Rull-Trinidad, Andres Amador García-Granada, Guillermo Reyes. Thermal Comparison of Conventional and Conformal Cooling Channel Designs for a Non-Constant Thickness Screw Cap. Journal of the Korean Society for Precision Engineering. 2018; 35 (1):95-101.
Chicago/Turabian StyleEric Dimla; Josep Rull-Trinidad; Andres Amador García-Granada; Guillermo Reyes. 2018. "Thermal Comparison of Conventional and Conformal Cooling Channel Designs for a Non-Constant Thickness Screw Cap." Journal of the Korean Society for Precision Engineering 35, no. 1: 95-101.
J. Pina-Estany; A.A. García-Granada. Molecular dynamics simulation method applied to nanocavities replication via injection moulding. International Communications in Heat and Mass Transfer 2017, 87, 1 -5.
AMA StyleJ. Pina-Estany, A.A. García-Granada. Molecular dynamics simulation method applied to nanocavities replication via injection moulding. International Communications in Heat and Mass Transfer. 2017; 87 ():1-5.
Chicago/Turabian StyleJ. Pina-Estany; A.A. García-Granada. 2017. "Molecular dynamics simulation method applied to nanocavities replication via injection moulding." International Communications in Heat and Mass Transfer 87, no. : 1-5.
The purpose of this paper is to shed light on how and when 3D simulations are preferable over 2D simulations in order to predict the replicated height of nanocavities via plastic injection moulding. Simulations are necessary since not all the cavity is copied depending on geometrical and injection conditions. A 3D simulation is preferable over a 2D simulation in two cases: (i) when the heat transfer through the walls parallel to the simulated domain is not negligible and (ii) when the polymer final shape is relevant. This work explains when 2D simulations like the more commonly found in the literature are not enough to obtain reliable results and how to obtain such results by means of a 3D simulation.
J. Pina-Estany; A. A. García-Granada. 3D Simulation of Nanostructures Replication via Injection Molding. International Polymer Processing 2017, 32, 483 -488.
AMA StyleJ. Pina-Estany, A. A. García-Granada. 3D Simulation of Nanostructures Replication via Injection Molding. International Polymer Processing. 2017; 32 (4):483-488.
Chicago/Turabian StyleJ. Pina-Estany; A. A. García-Granada. 2017. "3D Simulation of Nanostructures Replication via Injection Molding." International Polymer Processing 32, no. 4: 483-488.
Andres Amador García-Granada; Giovanni Gomez-Gras; Ramón Jerez-Mesa; J. Antonio Travieso-Rodriguez; Guillermo Reyes. Ball-burnishing effect on deep residual stress on AISI 1038 and AA2017-T4. Materials and Manufacturing Processes 2017, 32, 1279 -1289.
AMA StyleAndres Amador García-Granada, Giovanni Gomez-Gras, Ramón Jerez-Mesa, J. Antonio Travieso-Rodriguez, Guillermo Reyes. Ball-burnishing effect on deep residual stress on AISI 1038 and AA2017-T4. Materials and Manufacturing Processes. 2017; 32 (11):1279-1289.
Chicago/Turabian StyleAndres Amador García-Granada; Giovanni Gomez-Gras; Ramón Jerez-Mesa; J. Antonio Travieso-Rodriguez; Guillermo Reyes. 2017. "Ball-burnishing effect on deep residual stress on AISI 1038 and AA2017-T4." Materials and Manufacturing Processes 32, no. 11: 1279-1289.
J. Pina-Estany; C. Colominas; Jordi Fraxedas; J. Llobet; F. Perez-Murano; Josep M. Puigoriol-Forcada; D. Ruso; A.A. Garcia-Granada. A statistical analysis of nanocavities replication applied to injection moulding. International Communications in Heat and Mass Transfer 2017, 81, 131 -140.
AMA StyleJ. Pina-Estany, C. Colominas, Jordi Fraxedas, J. Llobet, F. Perez-Murano, Josep M. Puigoriol-Forcada, D. Ruso, A.A. Garcia-Granada. A statistical analysis of nanocavities replication applied to injection moulding. International Communications in Heat and Mass Transfer. 2017; 81 ():131-140.
Chicago/Turabian StyleJ. Pina-Estany; C. Colominas; Jordi Fraxedas; J. Llobet; F. Perez-Murano; Josep M. Puigoriol-Forcada; D. Ruso; A.A. Garcia-Granada. 2017. "A statistical analysis of nanocavities replication applied to injection moulding." International Communications in Heat and Mass Transfer 81, no. : 131-140.
Josep M. Puigoriol-Forcada; Andres Amador Garcia Granada; Reyna Mercedes Peña Aguilar; Guillermo Reyes Pozo. ANÁLISIS DE RIGIDEZ DE UN SISTEMA DE INTERIOR DE AUTOMÓVIL. EXPERIENCIA DOCENTE EN EL MARCO EEES. DYNA 2016, 91, 272 -276.
AMA StyleJosep M. Puigoriol-Forcada, Andres Amador Garcia Granada, Reyna Mercedes Peña Aguilar, Guillermo Reyes Pozo. ANÁLISIS DE RIGIDEZ DE UN SISTEMA DE INTERIOR DE AUTOMÓVIL. EXPERIENCIA DOCENTE EN EL MARCO EEES. DYNA. 2016; 91 (1):272-276.
Chicago/Turabian StyleJosep M. Puigoriol-Forcada; Andres Amador Garcia Granada; Reyna Mercedes Peña Aguilar; Guillermo Reyes Pozo. 2016. "ANÁLISIS DE RIGIDEZ DE UN SISTEMA DE INTERIOR DE AUTOMÓVIL. EXPERIENCIA DOCENTE EN EL MARCO EEES." DYNA 91, no. 1: 272-276.
Josep M. Puigoriol-Forcada; Andres Amador Garcia Granada; Ferran Lopez Navarro; Guillermo Reyes Pozo. IMPLEMENTACIÓN DE UN DISEÑO DE EXPERIMENTOS PARA UNA MEJORA ESTRUCTURAL DE UN ASIDERO APOYAPIERNAS. DYNA 2016, 91, 392 -396.
AMA StyleJosep M. Puigoriol-Forcada, Andres Amador Garcia Granada, Ferran Lopez Navarro, Guillermo Reyes Pozo. IMPLEMENTACIÓN DE UN DISEÑO DE EXPERIMENTOS PARA UNA MEJORA ESTRUCTURAL DE UN ASIDERO APOYAPIERNAS. DYNA. 2016; 91 (1):392-396.
Chicago/Turabian StyleJosep M. Puigoriol-Forcada; Andres Amador Garcia Granada; Ferran Lopez Navarro; Guillermo Reyes Pozo. 2016. "IMPLEMENTACIÓN DE UN DISEÑO DE EXPERIMENTOS PARA UNA MEJORA ESTRUCTURAL DE UN ASIDERO APOYAPIERNAS." DYNA 91, no. 1: 392-396.
Building end-use functional parts with additive manufacturing (AM) technologies is a challenging task. Several factors influence their surface finish, dimensional accuracy, mechanical properties and cost. Their orientation inside the building chamber is one of the most significant factors in AM processes. When using Fused Deposition Modeling (FDM) to build such parts, additional factors must be considered. This paper aims to accomplish two purposes: finding a good model to simulate FDM parts and correlating a finite element analysis (FEA) simulation with physical testing. The first objective was achieved by experimental tensile test of specimens to determine the nine mechanical constants that defines the stiffness matrix of an orthotropic material. Three Young’s modulus, three Poisson’s ratio and three shear modulus were experimentally obtained as well as yield tensile and ultimate strength of each specimen. A simple part was designed and manufactured in different orientations to be physically tested and simulated to achieve the second objective. Polycarbonate (PC) was used as part material. Combined loading including bending and torsion was used. Differences on mechanical response were observed during the physical test of the parts depending on the building direction. Conclusions comment results and the convenience of using a different constitutive model depending on the design and use specifications.
Miquel Domingo-Espin; Josep M. Puigoriol-Forcada; Andres Amador Garcia Granada; Jordi Llumà; Salvador Borros; Guillermo Reyes. Mechanical property characterization and simulation of fused deposition modeling Polycarbonate parts. Materials & Design 2015, 83, 670 -677.
AMA StyleMiquel Domingo-Espin, Josep M. Puigoriol-Forcada, Andres Amador Garcia Granada, Jordi Llumà, Salvador Borros, Guillermo Reyes. Mechanical property characterization and simulation of fused deposition modeling Polycarbonate parts. Materials & Design. 2015; 83 ():670-677.
Chicago/Turabian StyleMiquel Domingo-Espin; Josep M. Puigoriol-Forcada; Andres Amador Garcia Granada; Jordi Llumà; Salvador Borros; Guillermo Reyes. 2015. "Mechanical property characterization and simulation of fused deposition modeling Polycarbonate parts." Materials & Design 83, no. : 670-677.
A new method to calculate damping properties of rigid materials to be used in Finite Elements calculations is presented. Its relevance relies in its simplicity regarding the amount of materials data, mathematical treatment and experimental equipment needed. Its application allows more realistic calculation of mechanical parts and structures under dynamic loading. In most of those calculations very unreal assumptions are done when simulating with Finite Elements software to assure stability of the solution. The main reason for that situation is the lack of information of damping properties of materials in databases and the complexity of the reported methodology to calculate or measure them. Another reason is the common development time for new products in industry encouraging engineers to quickly evaluate mechanical performance of the product. Recommendations to select initial parameters are presented. Critical parameters to achieve good mathematical fits of the experimental data are identified. Theoretical treatment, fitting algorithm and experimental procedure are described and proved. Several materials: plastics and ferrous and nonferrous metals are studied to demonstrate the validity of the proposed method. Finally, the method is proved in a complex hyperstatic three-dimensional structure under dynamic loading; including working under resonance conditions. Results obtained prove the validity of the method and its application to real world situations.
Armando Pérez-Peña; Andrés A García-Granada; Joaquín Menacho; José J Molins; Guillermo Reyes. A methodology for damping measurement of engineering materials: application to a structure under bending and torsion loading. Journal of Vibration and Control 2014, 22, 2471 -2481.
AMA StyleArmando Pérez-Peña, Andrés A García-Granada, Joaquín Menacho, José J Molins, Guillermo Reyes. A methodology for damping measurement of engineering materials: application to a structure under bending and torsion loading. Journal of Vibration and Control. 2014; 22 (10):2471-2481.
Chicago/Turabian StyleArmando Pérez-Peña; Andrés A García-Granada; Joaquín Menacho; José J Molins; Guillermo Reyes. 2014. "A methodology for damping measurement of engineering materials: application to a structure under bending and torsion loading." Journal of Vibration and Control 22, no. 10: 2471-2481.
Fused deposition modeling (FDM) is one of the most important additive manufacturing technologies nowadays. However, there is a need to get more insight in the relationship between the process parameters and the final performance. Several studies have already identified some of these relationships, considering only the mechanical behavior of uniaxial tensile specimen under static loading. Yet, FDM technology is also designed to produce final parts that might be used in machinery or transportation applications. In such cases, dynamic loading is the most common situation and should be considered. The present article focuses on understanding the influence of three process parameters (nozzle diameter, number of contours, and raster-to-raster air gap) on the mechanical behavior under dynamic loading at specified conditions. A dynamic mechanical analysis apparatus has been used to characterize the polycarbonate mechanical behavior. On the other hand, a Taguchi approach and an analysis of variance have been used in order to quantify the influence of the parameters on such mechanical behavior.
Miquel Domingo-Espin; Salvador Borros; Nuria Agullo; Andres Amador Garcia Granada; Guillermo Reyes. Influence of Building Parameters on the Dynamic Mechanical Properties of Polycarbonate Fused Deposition Modeling Parts. 3D Printing and Additive Manufacturing 2014, 1, 70 -77.
AMA StyleMiquel Domingo-Espin, Salvador Borros, Nuria Agullo, Andres Amador Garcia Granada, Guillermo Reyes. Influence of Building Parameters on the Dynamic Mechanical Properties of Polycarbonate Fused Deposition Modeling Parts. 3D Printing and Additive Manufacturing. 2014; 1 (2):70-77.
Chicago/Turabian StyleMiquel Domingo-Espin; Salvador Borros; Nuria Agullo; Andres Amador Garcia Granada; Guillermo Reyes. 2014. "Influence of Building Parameters on the Dynamic Mechanical Properties of Polycarbonate Fused Deposition Modeling Parts." 3D Printing and Additive Manufacturing 1, no. 2: 70-77.
This paper reviews how biomedical engineers, in collaboration with physicians, biologists, chemists, physicists, and mathematicians, have developed models to explain how the impact of vascular interventions on blood flow predicts subsequent vascular repair. These models have become increasingly sophisticated and precise, propelling us toward optimization of cardiovascular therapeutics in general and personalizing treatments for patients with cardiovascular disease.
Jordi Martorell; Pablo Santomá; José J. Molins; Andrés A. García‐Granada; José A. Bea; Elazer Edelman; Mercedes Balcells. Engineered arterial models to correlate blood flow to tissue biological response. Annals of the New York Academy of Sciences 2012, 1254, 51 -56.
AMA StyleJordi Martorell, Pablo Santomá, José J. Molins, Andrés A. García‐Granada, José A. Bea, Elazer Edelman, Mercedes Balcells. Engineered arterial models to correlate blood flow to tissue biological response. Annals of the New York Academy of Sciences. 2012; 1254 (1):51-56.
Chicago/Turabian StyleJordi Martorell; Pablo Santomá; José J. Molins; Andrés A. García‐Granada; José A. Bea; Elazer Edelman; Mercedes Balcells. 2012. "Engineered arterial models to correlate blood flow to tissue biological response." Annals of the New York Academy of Sciences 1254, no. 1: 51-56.
A.A. Garcia-Granada; V.D. Lacarac; D.J. Smith; M.J. Pavier. A new procedure based on Sachs’ boring for measuring non-axisymmetric residual stresses: experimental application. International Journal of Mechanical Sciences 2001, 43, 2753 -2768.
AMA StyleA.A. Garcia-Granada, V.D. Lacarac, D.J. Smith, M.J. Pavier. A new procedure based on Sachs’ boring for measuring non-axisymmetric residual stresses: experimental application. International Journal of Mechanical Sciences. 2001; 43 (12):2753-2768.
Chicago/Turabian StyleA.A. Garcia-Granada; V.D. Lacarac; D.J. Smith; M.J. Pavier. 2001. "A new procedure based on Sachs’ boring for measuring non-axisymmetric residual stresses: experimental application." International Journal of Mechanical Sciences 43, no. 12: 2753-2768.
The cold expansion of fastener holes in aircraft components is a standard technique to improve fatigue life. There is concern that the beneficial residual stresses arising from cold expansion may relax due to creep. This paper describes experimental measurement and finite element prediction of cold expansion residual stresses and their redistribution after creep, with and without additional mechanical load. Experimental measurements of near-surface stresses used an X-ray diffraction technique while average through-the-thickness stresses were measured using a new method based on Sachs’ boring. This new method allowed non-axisymmetric residual stresses to be measured, as was the case when creep relaxation occurred with mechanical load. Axisymmetric and three dimensional finite element analyses were used to predict the stress distribution through the thickness of the component showing good agreement with measurement. Creep relaxation of residual stress does indeed occur, but some benefit of the cold expansion remains, particularly when creep relaxation is combined with the application of mechanical load.
A. A. García-Granada; V. D. Lacarac; P. Holdway; D. J. Smith; M. J. Pavier. Creep Relaxation of Residual Stresses Around Cold Expanded Holes. Journal of Engineering Materials and Technology 2000, 123, 125 -131.
AMA StyleA. A. García-Granada, V. D. Lacarac, P. Holdway, D. J. Smith, M. J. Pavier. Creep Relaxation of Residual Stresses Around Cold Expanded Holes. Journal of Engineering Materials and Technology. 2000; 123 (1):125-131.
Chicago/Turabian StyleA. A. García-Granada; V. D. Lacarac; P. Holdway; D. J. Smith; M. J. Pavier. 2000. "Creep Relaxation of Residual Stresses Around Cold Expanded Holes." Journal of Engineering Materials and Technology 123, no. 1: 125-131.