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    Optimization of Composite Fracture Properties: Method, Validation, and Applications

    Source: Journal of Applied Mechanics:;2016:;volume( 083 ):;issue: 007::page 71006
    Author:
    Gu, Grace X.
    ,
    Dimas, Leon
    ,
    Qin, Zhao
    ,
    Buehler, Markus J.
    DOI: 10.1115/1.4033381
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A paradigm in nature is to architect composites with excellent material properties compared to its constituents, which themselves often have contrasting mechanical behavior. Most engineering materials sacrifice strength for toughness, whereas natural materials do not face this tradeoff. However, biology's designs, adapted for organism survival, may have features not needed for some engineering applications. Here, we postulate that mimicking nature's elegant use of multimaterial phases can lead to better optimization of engineered materials. We employ an optimization algorithm to explore and design composites using soft and stiff building blocks to study the underlying mechanisms of nature's tough materials. For different applications, optimization parameters may vary. Validation of the algorithm is carried out using a test suite of cases without cracks to optimize for stiffness and compliance individually. A test case with a crack is also performed to optimize for toughness. The validation shows excellent agreement between geometries obtained from the optimization algorithm and the brute force method. This study uses different objective functions to optimize toughness, stiffness and toughness, and compliance and toughness. The algorithm presented here can provide researchers a way to tune material properties for a vast number of engineering problems by adjusting the distribution of soft and stiff materials.
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      Optimization of Composite Fracture Properties: Method, Validation, and Applications

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    http://yetl.yabesh.ir/yetl1/handle/yetl/160270
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    contributor authorGu, Grace X.
    contributor authorDimas, Leon
    contributor authorQin, Zhao
    contributor authorBuehler, Markus J.
    date accessioned2017-05-09T01:25:45Z
    date available2017-05-09T01:25:45Z
    date issued2016
    identifier issn0021-8936
    identifier othercnd_011_04_041022.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/160270
    description abstractA paradigm in nature is to architect composites with excellent material properties compared to its constituents, which themselves often have contrasting mechanical behavior. Most engineering materials sacrifice strength for toughness, whereas natural materials do not face this tradeoff. However, biology's designs, adapted for organism survival, may have features not needed for some engineering applications. Here, we postulate that mimicking nature's elegant use of multimaterial phases can lead to better optimization of engineered materials. We employ an optimization algorithm to explore and design composites using soft and stiff building blocks to study the underlying mechanisms of nature's tough materials. For different applications, optimization parameters may vary. Validation of the algorithm is carried out using a test suite of cases without cracks to optimize for stiffness and compliance individually. A test case with a crack is also performed to optimize for toughness. The validation shows excellent agreement between geometries obtained from the optimization algorithm and the brute force method. This study uses different objective functions to optimize toughness, stiffness and toughness, and compliance and toughness. The algorithm presented here can provide researchers a way to tune material properties for a vast number of engineering problems by adjusting the distribution of soft and stiff materials.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleOptimization of Composite Fracture Properties: Method, Validation, and Applications
    typeJournal Paper
    journal volume83
    journal issue7
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.4033381
    journal fristpage71006
    journal lastpage71006
    identifier eissn1528-9036
    treeJournal of Applied Mechanics:;2016:;volume( 083 ):;issue: 007
    contenttypeFulltext
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