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Residual stress evaluation in composites using a modified layer removal method

机译:使用改进的层去除方法评估复合材料中的残余应力

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摘要

The layer removal method is often used for measurement of internal stresses in homogeneous polymeric materials. In order to extend the use of this method to laminated composites certain refinements are needed. These include: (i) use of varying material properties (elastic moduli) through the thickness of the composite plate; (ii) use of geometric non-linear analysis to account for large deformations; and (iii) measurement not only of curvatures but also of strains. These refinements are necessary because a non-symmetric laminate is created when layers are removed, which shows large curvatures.
机译:层去除法通常用于测量均质聚合物材料中的内部应力。为了将这种方法的用途扩展到层压复合材料,需要进行某些改进。其中包括:(i)通过复合板的厚度使用变化的材料特性(弹性模量); (ii)使用几何非线性分析来解释大变形; (iii)不仅测量曲率,而且测量应变。这些改进是必要的,因为在移除层时会产生不对称的层压板,从而显示出较大的曲率。

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