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    Synthesis of C0 Path Generating Contact Aided Compliant Mechanisms Using the Material Mask Overlay Method

    Source: Journal of Mechanical Design:;2016:;volume( 138 ):;issue: 006::page 62301
    Author:
    Kumar, Prabhat
    ,
    Sauer, Roger A.
    ,
    Saxena, Anupam
    DOI: 10.1115/1.4033393
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Contactaided compliant mechanisms (CCMs) are synthesized via the material mask overlay strategy (MMOS) to trace desired nonsmooth paths. MMOS employs hexagonal cells to discretize the design region and engages negative circular masks to designate material states. To synthesize CCMs, the modified MMOS presented herein involves systematic mutation of five mask parameters through a hill climber search to evolve not only the continuum topology but also to position the rigid, interacting surfaces within some masks. To facilitate analysis with contact, boundary smoothing is performed by shifting boundary nodes of the evolving continuum. Various geometric singularities are subdued via hexagonal cells, and the Vnotches at the continuum boundaries are alleviated. Numerous hexagonal cells get morphed into concave subregions as a consequence. Large deformation finiteelement formulation with meanvalue coordinates based shape functions is used to cater to the generic hexagonal shapes. Contact analysis is accomplished via the Newton–Raphson (NR) iteration with load incrementing in conjunction with the augmented Lagrange multiplier method and active set constraints. An objective function based on Fourier shape descriptors (FSDs) is minimized subject to suitable design constraints. Two examples of pathgenerating CCMs are presented, their performance compared with a commercial software and fabricated to establish the efficacy of the proposed synthesis method.
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      Synthesis of C0 Path Generating Contact Aided Compliant Mechanisms Using the Material Mask Overlay Method

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    contributor authorKumar, Prabhat
    contributor authorSauer, Roger A.
    contributor authorSaxena, Anupam
    date accessioned2017-05-09T01:31:01Z
    date available2017-05-09T01:31:01Z
    date issued2016
    identifier issn1050-0472
    identifier othermd_138_06_062303.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/161796
    description abstractContactaided compliant mechanisms (CCMs) are synthesized via the material mask overlay strategy (MMOS) to trace desired nonsmooth paths. MMOS employs hexagonal cells to discretize the design region and engages negative circular masks to designate material states. To synthesize CCMs, the modified MMOS presented herein involves systematic mutation of five mask parameters through a hill climber search to evolve not only the continuum topology but also to position the rigid, interacting surfaces within some masks. To facilitate analysis with contact, boundary smoothing is performed by shifting boundary nodes of the evolving continuum. Various geometric singularities are subdued via hexagonal cells, and the Vnotches at the continuum boundaries are alleviated. Numerous hexagonal cells get morphed into concave subregions as a consequence. Large deformation finiteelement formulation with meanvalue coordinates based shape functions is used to cater to the generic hexagonal shapes. Contact analysis is accomplished via the Newton–Raphson (NR) iteration with load incrementing in conjunction with the augmented Lagrange multiplier method and active set constraints. An objective function based on Fourier shape descriptors (FSDs) is minimized subject to suitable design constraints. Two examples of pathgenerating CCMs are presented, their performance compared with a commercial software and fabricated to establish the efficacy of the proposed synthesis method.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleSynthesis of C0 Path Generating Contact Aided Compliant Mechanisms Using the Material Mask Overlay Method
    typeJournal Paper
    journal volume138
    journal issue6
    journal titleJournal of Mechanical Design
    identifier doi10.1115/1.4033393
    journal fristpage62301
    journal lastpage62301
    identifier eissn1528-9001
    treeJournal of Mechanical Design:;2016:;volume( 138 ):;issue: 006
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian