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Trouser tear testing of thin anisotropic polymer films and laminates
International Journal of Fracture ( IF 2.2 ) Pub Date : 2019-09-17 , DOI: 10.1007/s10704-019-00389-3
Md Shafiqul Islam , Eskil Andreasson , Sharon Kao-Walter

This research has investigated the essential work of fracture (EWF) from trouser tear test of polyethylene terephthalate (PET), low-density polyethylene (LDPE) films and their corresponding laminate using a convenient cyclic tear test method. Propagation of tear crack in these thermoplastics deflects from the initial crack path due to the material anisotropy. An improvement to a two-zone tear model for determining tear EWF was proposed for LDPE-like materials. Energy dissipation due to non-uniform bending of the trouser-legs was determined to be significant in EWF calculation of tearing and this was therefore considered in this study. To measure the tear EWF in laminates, contribution from delamination energy dissipation was accounted for.

中文翻译:

各向异性聚合物薄膜和层压板的裤子撕裂测试

本研究使用方便的循环撕裂测试方法研究了聚对苯二甲酸乙二醇酯 (PET)、低密度聚乙烯 (LDPE) 薄膜及其相应层压材料的裤子撕裂测试中断裂 (EWF) 的基本工作。由于材料的各向异性,这些热塑性塑料中撕裂裂纹的传播偏离了初始裂纹路径。对用于确定撕裂 EWF 的两区撕裂模型进行了改进,用于 LDPE 类材料。由于裤腿不均匀弯曲导致的能量耗散被确定在撕裂的 EWF 计算中很重要,因此在本研究中考虑了这一点。为了测量层压板的撕裂 EWF,考虑了分层能量耗散的贡献。
更新日期:2019-09-17
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