Abstract

This paper is focused on specification of conditions at failure in bovine cortical bone. Both experimental and analytical studies are conducted. The experimental part includes a series of novel direct shear tests which examine the sensitivity of shear strength to the applied normal stress for different orientations of the sample microstructure. These experiments are supplemented by standard axial compression and tension tests in order to define and quantify a general form of failure criterion. The analytical part examines two different methodologies, viz. critical plane approach and microstructure tensor approach, for defining the anisotropic strength criterion. A procedure for identification of material parameters is outlined which is based on the results of the performed material tests.

中文翻译：

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牛皮质骨各向异性强度特性的实验和分析研究。

摘要

本文着眼于牛皮质骨破坏条件的规范。进行了实验和分析研究。实验部分包括一系列新颖的直接剪切测试，这些测试针对样品微观结构的不同方向，检查了剪切强度对施加的法向应力的敏感性。这些实验辅以标准的轴向压缩和拉伸试验，以定义和量化失效准则的一般形式。分析部分考察了两种不同的方法，即。临界平面法和微结构张量法，用于定义各向异性强度准则。概述了基于执行的材料测试结果的材料参数识别程序。