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Residual thermal strains and stresses in organic matrix composite materials

机译:有机基复合材料中的残余热应变和应力

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Residual strain/stress may arise in organic matrix composite materials due to the intrinsic heterogeneity of their elementary constituents (polymer matrix and fibrous reinforcements), for instance, during material processing, thermal cycling, for harsh in-service conditions. This article illustrates some method to "measure" residual/internal strains/stresses of thermal origin-at both the microscopic and the mesoscopic levels-by inverse analysis of the matrix shrinkage profiles between fibers in unidirectional composite (at the microscopic scale) and the measure of the deflection (curvature) of 0/90 unsymmetric plates (mesoscopic scale). The analysis is carried out by using multiphysical phenomenological models.
机译:由于有机基质复合材料的基本成分(聚合物基质和纤维增强材料)的固有异质性,例如在材料加工,热循环以及恶劣的使用条件下,它们可能会在有机基质复合材料中产生残余应变/应力。本文介绍了一种通过微观分析单向复合材料中纤维之间的基体收缩曲线(在微观尺度上)和进行测量的方法,以“测量”微观和中观水平的热源残余/内部应变/应力。 0/90非对称板的挠曲(曲率)(介观尺度)。通过使用多物理现象学模型进行分析。

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