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首页> 外文会议>SEM IX International Congress on Experimental Mechanics June 5-8, 2000 Orlando, Florida >High strain-rate deformation of polymeric materials using split hopkinson pressure bar technique
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High strain-rate deformation of polymeric materials using split hopkinson pressure bar technique

机译：使用分裂霍普金森压杆技术的聚合物材料的高应变率变形

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摘要

A specific experimental method, the Split Hopkinson Pressure Bar(SHPB) technique has been constructed to determine the effect of specimen thickness on the dynamic stress-strain relationships for polymeric materials under the impact compressive loading conditions with strain-rate of the order of 10~3/s. The dynamic stress-strain behaviors are estiamted by using the strain output from the gages attached on the incident and transmitted bars in the SHPB technique. Both the dynamic compressive maximum stresses and pseudo dynamic moduli of the tested composite materials are found to be highly sensitive to the strain rate. Furthermore, bilinear relationship between the dynamic compressive maximum stresses and the log strain rate is noted. A bilinear relationship between the pseudo dynamic elastic moduli of the composite materials and the log strain rate is also noted.
机译：构造了一种特殊的实验方法，即分裂霍普金森压力棒（SHPB）技术，以确定试样厚度对聚合物材料在冲击压缩载荷条件下应变率约为10％时动态应力-应变关系的影响。 3 /秒通过使用SHPB技术中附在入射和透射棒上的量规输出的应变来估算动态应力-应变行为。被测复合材料的动态最大压缩应力和拟动态模量均对应变率高度敏感。此外，注意到动态压缩最大应力与对数应变率之间的双线性关系。还指出了复合材料的拟动力弹性模量与对数应变率之间的双线性关系。

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