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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Engineering with computers 14 (1998), S. 81-92 
    ISSN: 1435-5663
    Keywords: Mechanical analysis ; Design process ; Geometric modelling ; Multi-representations ; Integration ; Object-oriented approach
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Here we present the high-level operators of the Mechanical Analysis Module, which is a software architecture dedicated to a better integration of the structural analysis phase within an integrated Computer-Aided Design environment. This generic module is independent of the mechanical analysis method used, and takes place in a distributed software architecture of an integrated design environment. The paper shows that the mechanical operators defined are split among geometric and mechanical treatments in order to enforce this distributed architecture. Thus, the interface between the geometric treatments and the mechanical analysis environment shows the adequacy of the boolean operators when used with mechanical analysis treatments. However, this is demonstrated for a restricted domain of the mechanical analysis, and open ended questions still exist as to when the geometry of the models is diversified. Also, requirements for new geometric treatments and extensions of the current geometric representation are listed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Engineering with computers 11 (1995), S. 114-121 
    ISSN: 1435-5663
    Keywords: Design parameters ; Design process ; Freeform surfaces ; Finite-element method ; Geometric modelling ; Geometric modelling-structure analysis coupling ; NURBS ; Optimization ; Patch blending ; Sensitivity analysis ; Surface-mesh coupling ; Technological criterion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Optimization of three-dimensional parts is viewed here as optimization of the real design parameters found in geometric modellers, thus ensuring a part is usable in any further CAD treatment. Use of such a technique within the industrial design process is discussed. The B-Rep modelling technique forms the basis for the part geometry parameters. Design parameters are chosen or built up from these. A bi-directional link between surface description and location of nodes is described and provides good compatibility between the boundary geometry and the mesh throughout the optimization loops. Thus, objective and constraint functions both come from structure analysis and geometry implications. The necessary gradient computation of a mechanical criterion with respect to node location is processed by a method using an adjoin equation and a material derivative approach. An existing industrial mechanical solver can then be used, without any change being necessary: each development is performed using CAD software.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Engineering with computers 14 (1998), S. 23-35 
    ISSN: 1435-5663
    Keywords: Collaborative engineering ; Communication tools ; Cutting patterns ; Design process ; Flattening process ; Force density method ; Free-form surfaces ; Geometric modelling ; Integrated design ; Structural analysis ; Fabric structures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract The design of fabric structures incorporates specfic aspects due to the tight interdependency between geometric, mechanical and manufacturing data used by the different professional partners. This is highlighted through the analysis of the various steps of the design process. A design approach, that takes into account the various actors, their knowledge and the techniques available within each of the previous fields has been set up. This approach relies on the identification of the flow of information and on the organization of data sets that are compatible with the design process breakdown into tasks in order to preserve their integration. Approximation methods are associated with some of this information to create design phases adapted to each actor through software tools implementing various modelling processes. The form finding process, the mechanical analysis of the structure, the determination of cutting patterns are examples of such modelling processes. The surface model of the fabric structure is one of such sets of data which has been identified and used to preserve the integration of the design process. Associated with the integrated design architecture, a collaborative environment helps to set up communication between some of the actors according to the design process organization. This environment acts as a complementary tool to help seeking compromises among the actors participating in a given phase of the design process. The communication tools work on a distributed architecture in such a manner that dialogue objects are shared among the actors.
    Type of Medium: Electronic Resource
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