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Validation of low velocity impact modelling on different stacking sequences of CFRP laminates and influence of fibre failure

机译:低速冲击模型对CFRP层压板不同堆叠顺序的验证以及纤维破坏的影响

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摘要

This paper presents a validation of low-velocity impact Finite Element (FE) modelling. Based on switching ply location of reference layup [02,452,902,-452]s T700GC/M21 laminated plates from Bouvet et al. (2012) [1], twelve possible layups under a constraint of double-ply, mirror-symmetric, balanced, and quasi- isotropic are allowed. However only seven layups are chosen for the study and one of them reveals the importance of longitudinal fibre compressive failure during impact events. Therefore, the second aspect of this work is the introduction of a fibre compressive failure law associated with fracture damage development. This makes it possible to improve the simulation for all seven different layups. Good correspondence is achieved between simulation and experiment for aspects such as delamination areas/shapes and force–displacement responses. The influence of the addition of fibre compressive failure according to fracture toughness in mode I is discussed.
机译:本文提出了对低速冲击有限元(FE)建模的验证。基于参考叠层[02,452,902,-452]的Bouvet等人的T700GC / M21叠层板的切换层位置。 (2012)[1],允许在双层,镜像对称,平衡和准各向同性的约束下进行十二种可能的叠层。但是,只选择了七个铺层进行研究,其中之一表明了在冲击事件期间纵向纤维压缩破坏的重要性。因此,这项工作的第二个方面是引入了与断裂破坏发展有关的纤维压缩破坏定律。这样就可以改善所有七个不同布局的仿真。模拟和实验之间在分层区域/形状和力-位移响应等方面都取得了良好的对应关系。讨论了在模式I下纤维压缩破坏的增加对断裂韧性的影响。

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