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Author |
Wang, Y.; Rosen, D.W. |
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Title |
Multiscale heterogeneous modeling with surfacelets |
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Journal Article |
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Year |
2010 |
Publication |
Computer-Aided Design and Applications |
Abbreviated Journal |
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7 |
Issue |
5 |
Pages |
759-776 |
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Keywords |
Design;Models; |
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Abstract |
Computational design of structures and materials requires multiscale models to represent geometry and physical properties. In this paper, we propose a multiscale heterogeneous model, dual-Rep, to represent geometry and property distribution implicitly. A new basis function, called surfacelet, is proposed to capture boundary information more efficiently than traditional wavelets. Zoom operations are defined to support multiscale design. A method of materials model reconstruction from images is also developed. © 2010 CAD Solutions, LLC. |
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P. O. Box 48693, Tampa, FL 33647-0123, United States |
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1686-4360 |
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Basis functions;Boundary information;Computational design;Computational materials;Heterogeneous modeling;Heterogeneous models;Materials model;Multi-scale design;Multiscale models;Multiscales;Wavelet; |
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Call Number |
refbase @ user @ Wang2010 |
Serial |
11918 |
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Author |
Tsai, Y.-L.; You, C.-F.; Lin, J.-Y.; Liu, K.-Y. |
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Title |
Knowledge-based engineering for process planning and die design for automotive panels |
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Journal Article |
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Year |
2010 |
Publication |
Computer-Aided Design and Applications |
Abbreviated Journal |
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7 |
Issue |
1 |
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75-87 |
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Keywords |
Bits;Case based reasoning;Computer aided design;Dies;Knowledge based systems;Process control;Process planning;Stamping; |
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Abstract |
This work automates process planning and die design in automotive panel production using a novel knowledge-based engineering (KBE) methodology. Automotive panels are more complicated than common stamped parts because automotive panels are composed of groups of freeform surfaces. Stamping process planning identifies and sequences the necessary operations, finally producing the appropriate press dies. Case-based reasoning (CBR) is integrated into ordinary process planning and die design processes to generate a hybrid KBE system. Utilizing the CBR methodology to plan stamping process and design stamping dies for automotive panels reuses existing designs to develop new designs. In the proposed flexible system, process-planning and die-design functions can adapt existing designs or generate new designs based on stamping knowledge. Tacit knowledge of stamping parts is preserved and automotive panel manufacturing is accelerated by design automation when using the proposed KBE system. © 2010 CAD Solutions, LLC. |
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P. O. Box 48693, Tampa, FL 33647-0123, United States |
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1686-4360 |
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Automotive panel;Automotive panel stamping;CBr;Design automations;Design functions;Die design;Flexible system;Free-form surface;Knowledge-based engineering;Manufacturing IS;New design;Stamping dies;Stamping part;Stamping process;Stamping process planning;Tacit knowledge; |
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Call Number |
refbase @ user @ Tsai2010 |
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11897 |
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Author |
Protopsaltis, A.I.; Fudos, I. |
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Title |
A feature-based approach to re-engineering CAD models from cross sections |
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Journal Article |
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Year |
2010 |
Publication |
Computer-Aided Design and Applications |
Abbreviated Journal |
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7 |
Issue |
5 |
Pages |
739-757 |
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Computer aided design;Curve fitting;Models;Reverse engineering;Topology; |
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We introduce a novel approach to reconstructing 3D objects from cross sections of point clouds acquired by 3D scanning. In this context cross sections are almost planar clusters of 3D points. We first thin each cluster to obtain an ordered one dimensional set of planar points. We then partition the point set to subsets that can be approximated adequately by piecewise quadratic rational Bezier curves using an optimal fitting method. For each curve we select a number of representative points that lie on the fitting curves which are then used for reconstructing the object surface. Inter-cross section and intra-cross section constraints are imposed to support parameterization and editing of the derived model. Shape and topological differences between adjacent object contours pose several issues for the 3D reconstruction process. By using the contour skeleton information we produce intermediate cross sections representing places where ramifications occur to achieve robust covering (meshing) of adjacent slices. Finally, we present a proof of concept implementation of our method and several examples that demonstrate its effectiveness and efficiency. © 2010 CAD Solutions, LLC. |
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P. O. Box 48693, Tampa, FL 33647-0123, United States |
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1686-4360 |
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3D object;3D reconstruction;3D-scanning;CAD models;Constraint-based reverse engineering;Cross section;Feature-based;Fitting curves;Object contour;Object surface;Optimal fitting;Piece-wise;Planar clusters;Point cloud;Point set;Proof of concept;Rational Bezier curves;Representative point; |
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refbase @ user @ Protopsaltis2010 |
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11802 |
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Author |
Facoetti, G.; Gabbiadini, S.; Colombo, G.; Rizzi, C. |
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Title |
Knowledge-based system for guided modeling of sockets for lower limb prostheses |
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Journal Article |
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Year |
2010 |
Publication |
Computer-Aided Design and Applications |
Abbreviated Journal |
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7 |
Issue |
5 |
Pages |
723-737 |
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Keywords |
Design;Knowledge based systems;Prosthetics; |
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This paper presents a 3D CAD system to design sockets of lower limb prostheses, both transfemoral and transtibial. The proposed system, named Virtual Socket Laboratory, can be seen as a virtual laboratory where the user has at her/his disposal virtual tools that permit to emulate the procedures applied by orthopaedic technicians during the traditional socket manufacturing. The module is centred on the digital model of the patient and is based on the specific domain knowledge to guide the user during socket modelling suggesting the most appropriate design rules and procedures. First, main steps of the new design-modelling process and system functionalities are presented. Then, for each step, procedures carried during the traditional process, how they are executed with the new module and tools specifically developed are described. © 2010 CAD Solutions, LLC. |
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P. O. Box 48693, Tampa, FL 33647-0123, United States |
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1686-4360 |
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3d socket modelling;Artificial prosthesis;CAD system;Design rules;Digital model;Domain knowledge;Lower limb prosthesis;Modelling process;New design;System functionality;Virtual laboratories;Virtual tool; |
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refbase @ user @ Facoetti2010 |
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11595 |
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Author |
Bordegoni, M.; Cugini, U. |
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Title |
Tools for industrial design: From barriers to enablers of creativity |
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Journal Article |
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Year |
2010 |
Publication |
Computer-Aided Design and Applications |
Abbreviated Journal |
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Volume |
7 |
Issue |
5 |
Pages |
711-721 |
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Abstract |
This paper presents an innovative tool based on enactive interaction for the industrial design sector. Enactive interaction is based on the action-perception paradigm where users learn how to do things by doing. Recent progresses of the research on haptics have allowed us to build an innovative tool for the modification of the shape of a digital product that includes a haptic strip as interaction device. The tool allows designers to easily and intuitively modify digital shapes just acting on the extremities of the strip. Compared to traditional design tools based on the manipulation of mathematical surfaces through geometrical manipulators and control points, this tool has proved to better exploit designers skills and creativity. © 2010 CAD Solutions, LLC. |
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P. O. Box 48693, Tampa, FL 33647-0123, United States |
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1686-4360 |
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Control point;Design tool;Digital products;Digital shapes;Enactive interaction;Haptics;Industrial design;Interaction devices;Recent progress; |
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refbase @ user @ Bordegoni2010 |
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11525 |
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