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DTIC ADA266348: Micromechanical Damage Theories for Brittle Solids ... |
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by Defense Technical Information Center |
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Two-dimensional and three-dimensional statistical |
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micromechanical damage models with randomly located |
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interacting microcracks are presented to investigate the |
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overall nonlinear mechanical responses of microcrack- |
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weakened brittle solids. The macroscopic stress-strain |
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relations of elastic solids with interacting micro-cracks |
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are micromechanically derived by taking the ensemble |
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average over all possible realizations. Several different |
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approximate analytical solutions of a two-crack |
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interaction model are introduced to account for micro- |
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crack interaction among many randomly oriented and |
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distributed microcracks. The overall elastic damage |
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compliances of microcrack-weakened brittle solids are |
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also derived by further taking the volume average of the |
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ensemble-averaged stress-strain relations over the entire |
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material mesostructural domain. Some special examples are |
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investigated by using the proposed framework. At variance |
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with existing phenomenological damage models, the |
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proposed framework does not employ any fitted 'material |
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parameters'. 'Cleavage 1' microcrack growth and |
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'evolutionary damage models' within the proposed context |
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are also presented. Micromechanical damage mechanics, |
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Brittle solids, Interact microcracks, Evolutionary damage |
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models, Constitutive modelling |
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Date Published: 2018-03-11 18:01:24 |
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Identifier: DTIC_ADA266348 |
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Item Size: 87032623 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Ju, Jiann-Wen; PRINCETO... |
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# Uploaded by |
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@chris85 |
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