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首页> 外文期刊>Pure and Applied Geophysics >A Method for Testing Dynamic Tensile Strength and Elastic Modulus of Rock Materials Using SHPB
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A Method for Testing Dynamic Tensile Strength and Elastic Modulus of Rock Materials Using SHPB

机译：SHPB测试岩石材料动态抗拉强度和弹性模量的方法

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摘要

An experimental procedure for testing dynamic tensile strength and elastic modulus of rock materials at high strain rate loading is presented in this paper. In our test the split Hopkinson pressure bar (SHPB) was used to diametrally impact the Brazilian disc (BD) and flattened Brazilian disc (FBD) specimens of marble. A tensile strain rate of about 45 1/s was achieved at the center of the specimen. In order to improve the accuracy of the analysis, the initiation time difference between the strain waves acting on the two flat ends of the FBD specimen was treated properly. Typical failure modes corresponding to different loading conditions were observed. It was verified with a finite-element simulation that the equilibrium condition was established in the specimen before its failure. This numerical simulation validates the experimental procedure and also proves the suitability of formulation for the basic equations.
机译：本文提出了一种在高应变速率载荷下测试岩石材料的动态拉伸强度和弹性模量的实验程序。在我们的测试中，使用剖分式霍普金森压力棒（SHPB）径向冲击巴西圆盘（BD）和扁平巴西圆盘（FBD）大理石样品。在样品的中心达到约45 1 / s的拉伸应变率。为了提高分析的准确性，适当处理了作用在FBD样品两个平端上的应变波之间的起始时间差。观察到对应于不同载荷条件的典型失效模式。通过有限元仿真验证了在破坏之前样本中已经建立了平衡条件。数值模拟验证了实验过程，也证明了基本方程式的适用性。

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