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Entropy-damage mechanics for the failure investigation of plain weave fabric composites

机译：纯织物复合材料故障调查的熵损伤力学

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摘要

Experimental investigation of recent research shows that the accumulated generated entropy during low-cycle fatigue due to irreversible thermodynamic processes could be a constant value as a material property in metals and composite laminates. The present study aims to evaluate the constancy of accumulated generated entropy in static loading in plain weave fabric composites. A unit-cell-based model, considering different defects, is assembled with continuum damage mechanics (CDM) at the tows level. Equivalent elastic properties of a layer, the initiation, and evolution of damage, as well as irreversible deformation in uniaxial tension and in-plane shear, are simulated in a meaningful physical scale up to the final failure. The obtained results will confirm that Accumulated Entropy Generation (AEG) can be an intrinsic material property in static loading and a measure of the final failure, which can be used in mixed loading conditions.
机译：近期研究的实验研究表明，由于不可逆的热力学过程引起的低循环疲劳期间的累积产生的熵可能是金属和复合层压材料中的材料性能的恒定值。本研究旨在评估普通织物复合材料中静载累积产生熵的恒定。考虑不同缺陷的基于单元基于单元的模型，在拖动水平上用连续损伤力学（CDM）组装。损伤的层，启动和损伤的增速以及单轴张力和面内剪切中的不可逆变形的等效弹性性质被用有意义的物理规模模拟到最终失败。所得结果将确认累积熵生成（AEG）可以是静态负载中的固有物质性质和最终失效的量度，其可用于混合负载条件。

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