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Determination of the fracture toughness of debonded asymmetric sandwich beams with a thin-walled skin considering plastic deformation

机译:考虑塑性变形,用薄壁皮肤粘固不对称夹层梁的断裂韧性

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This paper analyzes the delamination behavior of thin-walled asymmetric sandwich beams. DCB tests are used for the calculation of fracture toughness values and show a high dependency of the delamination behavior on the damage configuration and geometry. The thickness of the sandwich skin and the position of the delamination relative to the adhesive layer prove to be crucial. The skin's plastic deformation is quantified by estimation using graphical and semi-analytical methods. Plastic strains occur over most of the cross section of the delaminated bending aluminum skin and have significant effects on the resulting fracture toughness. All results underlie significant variances due to several influences as shown. (C) 2017 Elsevier Ltd. All rights reserved.
机译:本文分析了薄壁不对称夹层梁的分层行为。 DCB测试用于计算断裂韧性值,并显示出在损坏配置和几何体上的分层行为的高依赖性。 夹层皮肤的厚度和分层相对于粘合剂层的位置是至关重要的。 通过使用图形和半分析方法估计来量化皮肤的塑性变形。 塑料应变发生在分层弯曲铝皮肤的大部分横截面上,对所得的断裂韧性产生显着影响。 所有结果都是由于若干影响而产生的显着方差。 (c)2017 Elsevier Ltd.保留所有权利。

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