Normalization of Shear Test Data for Rate-independent Compressible Fabrics
Normalization of Shear Test Data for Rate-independent Compressible Fabrics
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DOI：
10.1177/0021998308095367
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发表时间：
2008-08
影响因子：
2.9
通讯作者：
P. Harrison;J. Wiggers;A. Long
中科院分区：
文献类型：
--
作者：
P. Harrison;J. Wiggers;A. Long
本文介绍了一种同时使用画框（PF）和偏置拉伸（BE）试验来准确表征工程织物在低面内张力条件下格子抗剪性能的方法。已经开发了自动图像分析软件，以减少准确解释BE数据所需的费力的手动分析量。本文提出了与速率无关的可压缩织物PF和BE试验的归一化方法。PF测试结果的标准化相对简单，而BE测试结果与PF数据直接比较的标准化则更为复杂。归一化方法使用了一些简单的假设来解释测试过程中在BE样品上引起的不均匀剪切应变场。对不同纵横比的样品进行了BE测试，并对归一化结果进行了比较，验证了理论。
This article describes a method of using both picture frame (PF) and bias extension (BE) tests together to characterize accurately the trellis shearing resistance of engineering fabrics under low in-plane tension conditions. Automated image analysis software has been developed to reduce the amount of laborious manual analysis required to interpret BE data accurately. Normalization methods for both PF and BE tests on rate-independent compressible fabrics are presented. Normalization of PF test results is relatively straightforward while normalization of BE test results for direct comparison with PF data is more complicated. The normalization method uses a number of simple assumptions to account for the nonuniform shear strain field induced across BE samples during testing. Normalized results from BE tests on samples of different aspect ratios are compared and provide validation of the theory.