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Compression, Tension and Shear Testing of Fibrous Composite with the Split Hopkinson Bar Technique

机译:纤维复合材料与劈开霍普金森棒技术的压缩,张力和剪切试验

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The Split Hopkinson Bar (SHB) technique is used for high strain rate testing of T800/F3900 composite in compression, tension and shear. Digital Image Correlation (DIC) is used for measuring the full-field deformation on the surface of the specimen by using Shimadzu HPV-X2 high-speed video camera. Compression tests have been done on specimens machined from a unidirectional laminate in the 0° and 90° directions. Tensile tests were done in the 90° direction. Shear tests were done by using a notched specimen in a compression SHB apparatus. To study the effect of strain rate, quasi-static testing was also done using DIC and specimens with the same geometry as in the SHB tests. The results show that the DIC technique provides accurate strain measurements even at strains that are smaller than 1%. No strain rate effect is observed in compression in the 0° direction and significant strain rate effects are observed in compression and tension in the 90° direction, and in shear.
机译:拆分霍普金森棒(SHB)技术用于压缩,张力和剪切中T800 / F3900复合材料的高应变速率测试。数字图像相关(DIC)用于测量样品表面的全场变形,通过使用Shimadzu HPV-X2高速摄像机。已经在0°和90°方向上从单向层压板加工的试样上完成压缩测试。拉伸试验在90°方向上进行。通过使用压缩SHB装置中的缺口样品来完成剪切试验。为了研究应变速率的影响,还使用与SHB测试相同的几何形状的DIC和试样进行准静态测试。结果表明,即使在小于1%的菌株,DIC技术也能提供精确的应变测量。在0°方向上的压缩中没有观察到应变速率效应,并且在90°方向上的压缩和张力和剪切中观察到显着的应变速率效应。

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