天然纤维织物双轴向拉伸应变场的测量

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The displacement field and strain field of textile structure composite materialsnatural fiber fabricunder was studied by digital speckle correlation method during biaxial stretching process, and compare the different designs of cross＇shaped specimen to find that two-round transitional connect forms can scatter concentration in clamping stress region efficiently, thus to ensure the destruction occurring in measurement area.采用数字散斑相关方法对纺织结构复合材料的增强体――天然纤维织物，在双轴向拉伸过程中位移场和应变场进行研究，对设计成不同形状的十字试件进行比较，发现双圆角过渡连接形式可以较好地分散夹持区域的应力集中，从而保证破坏发生在测量区域内。