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Prof. Dr. Francesca Campana, Ph.D. In Mechanical System Design, is an associate professor in the field of design methods of industrial engineering, . Her main research field are CAD-CAE modeling and optimization, integrated product-process design, cellular materials.
For the past few decades, topology optimization (TO) has been used as a structural design optimization tool. With the passage of time, this kind of usage of TO has been extended to many application fields and branches, thanks to a better understanding of how manufacturing constraints can achieve a practical design solution. In addition, the advent of additive manufacturing and its subsequent advancements have further increased the applications of TO, raising the chance of competitive manufacturing. Design for additive manufacturing has also promoted the adoption of TO as a concept design tool of structural components. Nevertheless, the most frequent applications are related to lightweight design with or without design for assembly. A general approach to integrate TO in concept designs is still missing. This paper aims to close this gap by proposing guidelines to translate design requirements into TO inputs and to include topology and structural concerns at the early stage of design activity. Guidelines have been applied for the concept design of an inner supporting frame of an ancient bronze statue, with several constraints related to different general design requirements, i.e., lightweight design, minimum displacement, and protection of the statue’s structural weak zones to preserve its structural integrity. Starting from the critical analysis of the list of requirements, a set of concepts is defined through the application of TO with different set-ups (loads, boundary conditions, design and non-design space) and ranked by the main requirements. Finally, a validation of the proposed approach is discussed comparing the achieved results with the ones carried out through a standard iterative concept design.
Abas Ahmad; Michele Bici; Francesca Campana. Guidelines for Topology Optimization as Concept Design Tool and Their Application for the Mechanical Design of the Inner Frame to Support an Ancient Bronze Statue. Applied Sciences 2021, 11, 7834 .
AMA StyleAbas Ahmad, Michele Bici, Francesca Campana. Guidelines for Topology Optimization as Concept Design Tool and Their Application for the Mechanical Design of the Inner Frame to Support an Ancient Bronze Statue. Applied Sciences. 2021; 11 (17):7834.
Chicago/Turabian StyleAbas Ahmad; Michele Bici; Francesca Campana. 2021. "Guidelines for Topology Optimization as Concept Design Tool and Their Application for the Mechanical Design of the Inner Frame to Support an Ancient Bronze Statue." Applied Sciences 11, no. 17: 7834.
The interesting properties of Al 6061 aluminum foams have boosted the research on the correlation between foam composition and morphology and its mechanical response under dynamic conditions. In this study, ingots of an Al 6061-T4 foam were sectioned and analyzed in order to determine their microstructural and morphological characteristics, and then quasi-static and dynamic tests (10−3 to 3 × 102 s−1) were carried out to determine the material mechanical behavior. Dynamic tests, carried out by using the split Hopkinson bar, highlighted that the studied foam is characterized by a very good energy absorption capability, due to its ductile behavior. Nevertheless, the conducted research showed that cell morphology and distribution affect its mechanical behavior in dynamic conditions in which localized cell collapse may result in a decreased energy absorption and efficiency of the foam.
Francesca Campana; Edoardo Mancini; Daniela Pilone; Marco Sasso. Failure Mechanisms of an Al 6061 Alloy Foam under Dynamic Conditions. Materials 2021, 14, 1349 .
AMA StyleFrancesca Campana, Edoardo Mancini, Daniela Pilone, Marco Sasso. Failure Mechanisms of an Al 6061 Alloy Foam under Dynamic Conditions. Materials. 2021; 14 (6):1349.
Chicago/Turabian StyleFrancesca Campana; Edoardo Mancini; Daniela Pilone; Marco Sasso. 2021. "Failure Mechanisms of an Al 6061 Alloy Foam under Dynamic Conditions." Materials 14, no. 6: 1349.
Michele Bici; Francesca Campana; Edoardo Mancini; Daniela Pilone; Marco Sasso. Mesoscale Modeling of Aluminum Foams for FEA of Scattering Effects due to Cell Distribution. Computer-Aided Design and Applications 2021, 18, 1 .
AMA StyleMichele Bici, Francesca Campana, Edoardo Mancini, Daniela Pilone, Marco Sasso. Mesoscale Modeling of Aluminum Foams for FEA of Scattering Effects due to Cell Distribution. Computer-Aided Design and Applications. 2021; 18 (6):1.
Chicago/Turabian StyleMichele Bici; Francesca Campana; Edoardo Mancini; Daniela Pilone; Marco Sasso. 2021. "Mesoscale Modeling of Aluminum Foams for FEA of Scattering Effects due to Cell Distribution." Computer-Aided Design and Applications 18, no. 6: 1.
The use of continuum mechanics, especially Finite Element Analysis (FEA) has gained an extensive application in the medical field, in order to simulate soft tissues. In particular, colorectal simulations can be used to understand the interaction between colon and the surrounding tissues, and also, between colon and surgical instruments. Although several works have been introduced considering small displacements, FEA applied to colorectal surgical scenarios with large displacements is still a challenge. This work aims to investigate how FEA can describe non-linear effects induced by material properties and different approximating geometries for colon. More in detail, it shows a comparison between simulations that are performed using well-known hyperelastic models (principally Mooney-Rivlin and, in one case, Yeoh) and the linear one. These different mechanical behaviours are applied on different geometrical models (planar, cylindrical and a 3D-shape from digital acquisitions) with the aim of evaluating also the effects of geometric non-linearity. Increasing the displacements imposed by the surgical instruments, the adoption of a hyperelastic model shows lower stresses than the linear elastic one that seems to overestimate the averaged stress. Moreover, the details of the geometrical models affect the results in terms of stress-strain distribution, since it provides a better localisation of the effects related to the hypothesis of large strains.
Robinson Guachi; Fabiano Bini; Michele Bici; Francesca Campana; Franco Marinozzi; Lorena Guachi. Finite element analysis in colorectal surgery: non-linear effects induced by material model and geometry. Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization 2019, 8, 219 -230.
AMA StyleRobinson Guachi, Fabiano Bini, Michele Bici, Francesca Campana, Franco Marinozzi, Lorena Guachi. Finite element analysis in colorectal surgery: non-linear effects induced by material model and geometry. Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization. 2019; 8 (2):219-230.
Chicago/Turabian StyleRobinson Guachi; Fabiano Bini; Michele Bici; Francesca Campana; Franco Marinozzi; Lorena Guachi. 2019. "Finite element analysis in colorectal surgery: non-linear effects induced by material model and geometry." Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization 8, no. 2: 219-230.
Mechanical properties of the soft tissues and an accurate mathematical model are important to reproduce the soft tissue’s material behavior (mechanical behavior) in a virtual simulation. This type of simulations by Finite Element Analysis (FEA) is required to analyze injury mechanisms, vehicle accidents, airplane ejections, blast-related events, surgical procedures simulation and to develop and test surgical implants where is mandatory take into account the high strain-rate. This work aims to highlight the role of the hyperelastic models, which can be used to simulate the highly nonlinear mechanical behavior of soft tissues. After a description of a set of formulations that can be defined as phenomenological models, a comparison between two models is discussed according to case study that represents a process of tissues clamping.
Carlos Bustamante-Orellana; Robinson Guachi; Lorena Guachi-Guachi; Simone Novelli; Francesca Campana; Fabiano Bini; Franco Marinozzi. Biomechanics of Soft Tissues: The Role of the Mathematical Model on Material Behavior. Advances in Intelligent Systems and Computing 2019, 301 -311.
AMA StyleCarlos Bustamante-Orellana, Robinson Guachi, Lorena Guachi-Guachi, Simone Novelli, Francesca Campana, Fabiano Bini, Franco Marinozzi. Biomechanics of Soft Tissues: The Role of the Mathematical Model on Material Behavior. Advances in Intelligent Systems and Computing. 2019; ():301-311.
Chicago/Turabian StyleCarlos Bustamante-Orellana; Robinson Guachi; Lorena Guachi-Guachi; Simone Novelli; Francesca Campana; Fabiano Bini; Franco Marinozzi. 2019. "Biomechanics of Soft Tissues: The Role of the Mathematical Model on Material Behavior." Advances in Intelligent Systems and Computing , no. : 301-311.
In injection molding production, automatic inspections are needed to control defects and evaluate the assigned functional tolerances of components and dies. With the “Smart Manufacturing” approach as a point of view, this paper resumes part of a wider research aiming the integration and the automation of a Reverse Engineering inspection process in components and die set-up. The paper compares two fitting approaches for recognition of portions of cylindrical surfaces. Therefore, they are evaluated in the respect of an automatic voxel-based feature recognition of 3D dense cloud of points for tolerance inspection of injection-molded parts. The first approach is a 2D Levenberg Marquardt algorithm coupled with a first guess evaluation made by the Kasa algebraic form. The second one is a 3D fitting based on the RANdom SAmple Consensus algorithm (RANSAC). The evaluation has been made according to the ability of the approaches of working on points associated to the voxel structure that locally divides the cloud to characterize planar and curved surfaces. After the presentation of the overall automatic recognition, the cylindrical surface algorithms are presented and compared trough test cases.
Michele Bici; Francesca Campana. Comparison of Algorithms for Recognition of Cylindrical Features in a Voxel-Based Approach for Tolerance Inspection. Recent Advances in Computational Mechanics and Simulations 2019, 213 -225.
AMA StyleMichele Bici, Francesca Campana. Comparison of Algorithms for Recognition of Cylindrical Features in a Voxel-Based Approach for Tolerance Inspection. Recent Advances in Computational Mechanics and Simulations. 2019; ():213-225.
Chicago/Turabian StyleMichele Bici; Francesca Campana. 2019. "Comparison of Algorithms for Recognition of Cylindrical Features in a Voxel-Based Approach for Tolerance Inspection." Recent Advances in Computational Mechanics and Simulations , no. : 213-225.
In sheet metal forming, springback represents a major drawback increasing die set-up problems, especially for ultra-high strength steels. Finite Element Analysis is a well-established method to simulate the process during design, and multicriteria optimizations, for example, via surrogate models, are investigated in order to develop integrated design. Since to take into account also springback compensation die design may involve a large number of geometric variables, this paper presents a robust design formulation, based on the adoption of the shape function optimization, to describe springback in terms of weights directly associated to global shape variations of the die shape. Doing so, multicriteria optimization, which involves also die compensation, can be set up in a more intuitive approach, as requested in the preliminary steps of die design. After the introduction of the industrial problem, the mathematical formulation of the shape function optimization is presented together with its novel extension to Robust Design, which is based on the Dual Response Surface. Through a test case derived from the head part of a B-pillar, stamped from a Dual Phase sheet 1.5 mm thick, this novel extension investigates the effect of 6% variation from nominal values of initial yield stress and thickness. Results demonstrate the feasibility of the procedure, underlying that an optimal compensation may not be optimal in terms of process robustness.
Michele Bici; Francesca Campana; Flavio Cimolin; Leopoldo Rizzo. Robust Die Compensation in Sheet Metal Design through the Integration of Dual Response Surface and Shape Function Optimization. Mathematical Problems in Engineering 2019, 2019, 1 -12.
AMA StyleMichele Bici, Francesca Campana, Flavio Cimolin, Leopoldo Rizzo. Robust Die Compensation in Sheet Metal Design through the Integration of Dual Response Surface and Shape Function Optimization. Mathematical Problems in Engineering. 2019; 2019 ():1-12.
Chicago/Turabian StyleMichele Bici; Francesca Campana; Flavio Cimolin; Leopoldo Rizzo. 2019. "Robust Die Compensation in Sheet Metal Design through the Integration of Dual Response Surface and Shape Function Optimization." Mathematical Problems in Engineering 2019, no. : 1-12.
Computer-Aided Design and Applications is an international journal on the applications of CAD and CAM. It publishes papers in the general domain of CAD plus in emerging fields like bio-CAD, nano-CAD, soft-CAD, garment-CAD, PLM, PDM, CAD data mining, CAD and the internet, CAD education, genetic algorithms and CAD engines. The journal is aimed at all developers and users of CAD technology to ptovide CAD solutions for various stages of design and manufacturing. The journal publishes all about Computer-Aided Design and Computer-Aided technologies.
Robinson Guachi; Michele Bici; Lorena Guachi; Francesca Campana; Fabiano Bini; Franco Marinozzi. Geometrical Modelling Effects on FEA of Colorectal Surgery. Computer-Aided Design and Applications 2018, 16, 1 .
AMA StyleRobinson Guachi, Michele Bici, Lorena Guachi, Francesca Campana, Fabiano Bini, Franco Marinozzi. Geometrical Modelling Effects on FEA of Colorectal Surgery. Computer-Aided Design and Applications. 2018; 16 (4):1.
Chicago/Turabian StyleRobinson Guachi; Michele Bici; Lorena Guachi; Francesca Campana; Fabiano Bini; Franco Marinozzi. 2018. "Geometrical Modelling Effects on FEA of Colorectal Surgery." Computer-Aided Design and Applications 16, no. 4: 1.
In this paper, we aim at providing results concerning the application of desktop systems for rapid prototyping of medical replicas that involve complex shapes, as, for example, folds of a colon. Medical replicas may assist preoperative planning or tutoring in surgery to better understand the interaction among pathology and organs. Major goals of the paper concern with guiding the digital design workflow of the replicas and understanding their final performance, according to the requirements asked by the medics (shape accuracy, capability of seeing both inner and outer details, and support and possible interfacing with other organs). In particular, after the analysis of these requirements, we apply digital design for colon replicas, adopting two desktop systems. The experimental results confirm that the proposed preprocessing strategy is able to conduct to the manufacturing of colon replicas divided in self-supporting segments, minimizing the supports during printing. This allows also to reach an acceptable level of final quality, according to the request of having a 3D presurgery overview of the problems. These replicas are compared through reverse engineering acquisitions made by a structured-light system, to assess the achieved shape and dimensional accuracy. Final results demonstrate that low-cost desktop systems, coupled with proper strategy of preprocessing, may have shape deviation in the range of ±1 mm, good for physical manipulations during medical diagnosis and explanation.
Michele Bici; Valerio Cardini; Marco Eugeni; Robinson Guachi; Fabiano Bini; Francesca Campana; Franco Marinozzi; Paolo Gaudenzi. Digital Design of Medical Replicas via Desktop Systems: Shape Evaluation of Colon Parts. Journal of Healthcare Engineering 2018, 2018, 1 -10.
AMA StyleMichele Bici, Valerio Cardini, Marco Eugeni, Robinson Guachi, Fabiano Bini, Francesca Campana, Franco Marinozzi, Paolo Gaudenzi. Digital Design of Medical Replicas via Desktop Systems: Shape Evaluation of Colon Parts. Journal of Healthcare Engineering. 2018; 2018 ():1-10.
Chicago/Turabian StyleMichele Bici; Valerio Cardini; Marco Eugeni; Robinson Guachi; Fabiano Bini; Francesca Campana; Franco Marinozzi; Paolo Gaudenzi. 2018. "Digital Design of Medical Replicas via Desktop Systems: Shape Evaluation of Colon Parts." Journal of Healthcare Engineering 2018, no. : 1-10.
Nowadays, Finite Element Analysis (FEA) has highly increased its applications in medical field, for designing and improving prosthesis, orthosis, implants, preoperative plans and for simulations of surgery. In recent years, Minimally Invasive Surgery (MIS) has increased its applications, either using surgical assistant robot or following traditional (manual) way. Nevertheless, in parallel to the increase of application fields, new issues also arise. In particular, instruments must be inserted through a trocar to access the abdominal cavity, without capability of direct manipulation of tissues so that a loss of sensitivity occurs. This loss is caused by the absence of a direct force-feedback, resulting from the interaction between surgical instruments and soft tissues. More in detail, the lack of force-feedback is a problem present in several areas that are strongly linked to engineering, for instance: Preoperative planning, surgical simulator, teleoperation, and surgical robot assistant. In this field, FEA may take an important role, helping us to understand the distribution of stress-strain and the contact force in devices as well as in tissues.
Robinson Guachi; Michele Bici; Lorena Guachi; Francesca Campana; Fabiano Bini; Franco Marinozzi. Geometrical Modelling Effects on FEA of Colorectal Surgery. Proceedings of CAD'18 2018, 1 .
AMA StyleRobinson Guachi, Michele Bici, Lorena Guachi, Francesca Campana, Fabiano Bini, Franco Marinozzi. Geometrical Modelling Effects on FEA of Colorectal Surgery. Proceedings of CAD'18. 2018; ():1.
Chicago/Turabian StyleRobinson Guachi; Michele Bici; Lorena Guachi; Francesca Campana; Fabiano Bini; Franco Marinozzi. 2018. "Geometrical Modelling Effects on FEA of Colorectal Surgery." Proceedings of CAD'18 , no. : 1.
Ancient bronze statues mainly require material integrity assessment and restoration. Restoration may include also the update of the museum exhibition, defining new structural frames and fragment re-composition to preserve the statue and improve the interpretation of the original aspect. This paper proves how engineering methods (such as Finite Element Analysis, Computer Aided Design modelling, Reverse Engineering) may assist cultural heritage experts and restorers in these tasks. It presents the activities made together with the Museo Nazionale Romano and the Istituto Superiore per la Conservazione e il Restauro, on the so-called "Principe Ellenistico" (Hellenistic Prince). This bronze was found in pieces (body, left arm and right leg), at the end of 19th century during an excavation made in Rome. No visual or reference sources can say its origin and its final posture was defined by restorers at the end of the 19th century according to their hypothesis and studies. In the 20th century, a further restoration was made on the critical areas of the surface, together with some structural improvement of the inner frame. Nowadays, after a review of its position inside the Museum, new experimental and numerical analyses have been carried out to better understand surface weakness and correct left arm positioning.
M Bici; F Campana; O Colacicchi; G D’Ercoli. CAD-CAE methods to support restoration and museum exhibition of bronze statues: the “Principe Ellenistico”. IOP Conference Series: Materials Science and Engineering 2018, 364, 012014 .
AMA StyleM Bici, F Campana, O Colacicchi, G D’Ercoli. CAD-CAE methods to support restoration and museum exhibition of bronze statues: the “Principe Ellenistico”. IOP Conference Series: Materials Science and Engineering. 2018; 364 (1):012014.
Chicago/Turabian StyleM Bici; F Campana; O Colacicchi; G D’Ercoli. 2018. "CAD-CAE methods to support restoration and museum exhibition of bronze statues: the “Principe Ellenistico”." IOP Conference Series: Materials Science and Engineering 364, no. 1: 012014.
Michele Bici; Salvatore Brischetto; Francesca Campana; Carlo Giovanni Ferro; Carlo Seclì; Sara Varetti; Paolo Maggiore; Andrea Mazza. Development of a multifunctional panel for aerospace use through SLM additive manufacturing. Procedia CIRP 2018, 67, 215 -220.
AMA StyleMichele Bici, Salvatore Brischetto, Francesca Campana, Carlo Giovanni Ferro, Carlo Seclì, Sara Varetti, Paolo Maggiore, Andrea Mazza. Development of a multifunctional panel for aerospace use through SLM additive manufacturing. Procedia CIRP. 2018; 67 ():215-220.
Chicago/Turabian StyleMichele Bici; Salvatore Brischetto; Francesca Campana; Carlo Giovanni Ferro; Carlo Seclì; Sara Varetti; Paolo Maggiore; Andrea Mazza. 2018. "Development of a multifunctional panel for aerospace use through SLM additive manufacturing." Procedia CIRP 67, no. : 215-220.
Finite Element Analysis (FEA) has gained an extensive application in the medical field, such as soft tissues simulations. In particular, colorectal simulations can be used to understand the interaction with the surrounding tissues, or with instruments used in surgical procedures. Although several works have been introduced considering small displacements, as a result of the forces exerted on adjacent tissues, FEA applied to colorectal surgical scenarios is still a challenge. Therefore, this work aims to provide a sensitivity analysis on three geometric models, taking in mind different bioengineering tasks. In this way, a set of simulations has been performed using three mechanical models named Linear Elastic, Hyper-Elastic with a Mooney-Rivlin material model, and Hyper-Elastic with a YEOH material model.
Robinson Guachi; Fabiano Bini; Michele Bici; Francesca Campana; Franco Marinozzi. Finite Element Model Set-up of Colorectal Tissue for Analyzing Surgical Scenarios. Deformation Models 2017, 599 -609.
AMA StyleRobinson Guachi, Fabiano Bini, Michele Bici, Francesca Campana, Franco Marinozzi. Finite Element Model Set-up of Colorectal Tissue for Analyzing Surgical Scenarios. Deformation Models. 2017; ():599-609.
Chicago/Turabian StyleRobinson Guachi; Fabiano Bini; Michele Bici; Francesca Campana; Franco Marinozzi. 2017. "Finite Element Model Set-up of Colorectal Tissue for Analyzing Surgical Scenarios." Deformation Models , no. : 599-609.
Michele Bici; Francesca Campana; Micaela De Michelis. Mesoscale geometric modeling of cellular materials for finite element analysis. Computer-Aided Design and Applications 2017, 14, 760 -769.
AMA StyleMichele Bici, Francesca Campana, Micaela De Michelis. Mesoscale geometric modeling of cellular materials for finite element analysis. Computer-Aided Design and Applications. 2017; 14 (6):760-769.
Chicago/Turabian StyleMichele Bici; Francesca Campana; Micaela De Michelis. 2017. "Mesoscale geometric modeling of cellular materials for finite element analysis." Computer-Aided Design and Applications 14, no. 6: 760-769.
Michele Bici; Giovanni B. Broggiato; Francesca Campana; Alessandro Dughiero. Computer Aided Inspection Procedures to Support Smart Manufacturing of Injection Moulded Components. Procedia Manufacturing 2017, 11, 1184 -1192.
AMA StyleMichele Bici, Giovanni B. Broggiato, Francesca Campana, Alessandro Dughiero. Computer Aided Inspection Procedures to Support Smart Manufacturing of Injection Moulded Components. Procedia Manufacturing. 2017; 11 ():1184-1192.
Chicago/Turabian StyleMichele Bici; Giovanni B. Broggiato; Francesca Campana; Alessandro Dughiero. 2017. "Computer Aided Inspection Procedures to Support Smart Manufacturing of Injection Moulded Components." Procedia Manufacturing 11, no. : 1184-1192.
Nowadays, the most updated CAE systems include structural optimization toolbox. This demonstrates that topological optimization is a mature technique, although it is not a well-established design practice. It can be applied to increase performance in lightweight design, but also to explore new topological arrangements. It is done through a proper definition of the problem domain, which means defining functional surfaces (interface surfaces with specific contact conditions), preliminary external lengths and geometrical conditions related to possible manufacturing constraints. In this sense, its applicability is possible for all kind of manufacturing, although, in Additive Manufacturing, its extreme solutions can be obtained. In this paper, we aim to present the general applicability of topological optimization in the design workflow together with a case study, exploited according to two design intents: the lightweight criterion and the conceptual definition of an enhanced topology. It demonstrates that this method may help to decrease the design efforts, which, especially in the case of additive manufacturing, can be reallocated for other kind of product optimization
Michele Bici; Giovanni B. Broggiato; Francesca Campana. Topological Optimization in Concept Design: starting approach and a validation case study. Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020) 2016, 289 -299.
AMA StyleMichele Bici, Giovanni B. Broggiato, Francesca Campana. Topological Optimization in Concept Design: starting approach and a validation case study. Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020). 2016; ():289-299.
Chicago/Turabian StyleMichele Bici; Giovanni B. Broggiato; Francesca Campana. 2016. "Topological Optimization in Concept Design: starting approach and a validation case study." Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020) , no. : 289-299.
This paper presents the advancements of an automatic segmentation procedure based on the concept of Hierarchical Space Partitioning. It is aimed at tolerance inspection of electromechanical parts produced by injection moulding and acquired by laser scanning. After a general overview of the procedure, its application for recognising cylindrical surfaces is presented and discussed through a specific industrial test case.
Michele Bici; Francesca Campana; Alessio Trifirò. Automatic post-processing for tolerance inspection of digitized parts made by injection moulding. Computer-Aided Design and Applications 2016, 13, 835 -844.
AMA StyleMichele Bici, Francesca Campana, Alessio Trifirò. Automatic post-processing for tolerance inspection of digitized parts made by injection moulding. Computer-Aided Design and Applications. 2016; 13 (6):835-844.
Chicago/Turabian StyleMichele Bici; Francesca Campana; Alessio Trifirò. 2016. "Automatic post-processing for tolerance inspection of digitized parts made by injection moulding." Computer-Aided Design and Applications 13, no. 6: 835-844.
This paper presents a point cloud segmentation based on a spatial multiresolution discretisation that is derived from hierarchical space partitioning. Through part type recognition it aims to simplify Computer Aided Tolerance Inspection of electromechanical components avoiding cloud-CAD model registration. A voxel structure subdivides the point cloud. Then, through a suitable surface partitioning, it is linked to component volumes by means of the morphological components of the binary image that is derived from voxel attributes (‘true state’ if points are included in a specific cluster or ‘false state’ if they are not). The proposed approach is then applied on a din-rail clip of a breaker, made by injection moulding. This case study points out the suitability of the approach on box-shaped components or with normal protrusions, and its limits concerning the assumptions of the implementation.
Michele Bici; Francesca Campana; Stefano Petriaggi; Luca Tito. Study of a Point Cloud Segmentation with Part Type Recognition for Tolerance Inspection of Plastic Components via Reverse Engineering. Computer-Aided Design and Applications 2014, 11, 640 -648.
AMA StyleMichele Bici, Francesca Campana, Stefano Petriaggi, Luca Tito. Study of a Point Cloud Segmentation with Part Type Recognition for Tolerance Inspection of Plastic Components via Reverse Engineering. Computer-Aided Design and Applications. 2014; 11 (6):640-648.
Chicago/Turabian StyleMichele Bici; Francesca Campana; Stefano Petriaggi; Luca Tito. 2014. "Study of a Point Cloud Segmentation with Part Type Recognition for Tolerance Inspection of Plastic Components via Reverse Engineering." Computer-Aided Design and Applications 11, no. 6: 640-648.
Several methods are available for making metal foams. They allow to tailor their mechanical, thermal, acoustic, and electrical properties for specific applications by varying the relative density as well as the cell size and morphology. Foams have a very heterogeneous structure so that their properties may show a large scatter. In this paper, an aluminum foam produced by means of foaming of powder compacts and another one prepared via the infiltration process were analyzed and compared. Image analysis has been used as a useful tool to determine size, morphology, and distribution of cells in both foams and to correlate cell morphology with the considered manufacturing process. The results highlighted that cell size and morphology are strictly dependent upon the manufacturing method. This paper shows how some standard 2D morphological indicators may be usefully adopted to characterize foams whose structure derives from the specific manufacturing process.
A. Boschetto; F. Campana; Daniela Pilone. Comparison Through Image Analysis Between Al Foams Produced Using Two Different Methods. Journal of Materials Engineering and Performance 2013, 23, 572 -580.
AMA StyleA. Boschetto, F. Campana, Daniela Pilone. Comparison Through Image Analysis Between Al Foams Produced Using Two Different Methods. Journal of Materials Engineering and Performance. 2013; 23 (2):572-580.
Chicago/Turabian StyleA. Boschetto; F. Campana; Daniela Pilone. 2013. "Comparison Through Image Analysis Between Al Foams Produced Using Two Different Methods." Journal of Materials Engineering and Performance 23, no. 2: 572-580.
The actual foam density affects its mechanical energy absorption capabilities. Making structural elements starting from the cutting of semi-finished items may produce uneven results due to the lack of homogeneity in the foam. The subject of this work is the study of AlSi7 metallic foams, the focus being on the evaluation of the effective density distribution throughout large ingots. This is the first step required to establish a correlation between manufacturing process parameters and mechanical properties. The results highlighted that the void density increases from the centre toward the ingot outer wall and that specimens coming from different regions of the ingot have a very different mechanical behaviour. This is probably due to the difficulty in controlling temperature gradients and cooling rates throughout big mould cavities during the production process. (c) 2012 Elsevier B.V. All rights reserved
Francesca Campana; Luca Cortese; Daniela Pilone. Property variations in large AlSi7 alloy foam ingots. Materials Science and Engineering: A 2012, 556, 400 -407.
AMA StyleFrancesca Campana, Luca Cortese, Daniela Pilone. Property variations in large AlSi7 alloy foam ingots. Materials Science and Engineering: A. 2012; 556 ():400-407.
Chicago/Turabian StyleFrancesca Campana; Luca Cortese; Daniela Pilone. 2012. "Property variations in large AlSi7 alloy foam ingots." Materials Science and Engineering: A 556, no. : 400-407.