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岩土材料广泛存在于自然界中,在重力沉积作用下表现出明显的横观各向同性。为了更好地研究横观各向同性材料的破坏机制,基于Christensen提出的破坏准则应与弹性应变能函数相协调的思想,推导了横观各向同性材料的弹性应变能,通过应变能的分解和整理,分析了应变能中各项所表示的物理意义,确定了级数展开的基,从而使得应变能函数和材料破坏准则在形式上具有一致性,最终提出了一个适用于脆性横观各向同性材料的破坏准则。该准则由5项能够与弹性应变能相协调的部分组成,仅包含5个独立且物理力学意义清晰的参数。基于常规试验给出了5个独立参数的确定方案。通过与Tsai-Wu准则及已发表的多组试验数据的对比,验证了准则的正确性。
Geomaterials are widely found in nature and show obvious transverse isotropy under gravity sedimentation. In order to study the failure mechanism of transversely isotropic materials better, based on the idea that the failure criterion proposed by Christensen should be coordinated with elastic strain energy function, the elastic strain energy of transversely isotropic material is deduced. Through the decomposition of strain energy And analyzed and sorted out the physical meanings of various expressions in the strain energy and determined the basis for the series expansion so that the strain energy function and material failure criterion are consistent in form. Finally, Guidelines for the destruction of same-sex materials. The guideline consists of five parts that can be harmonized with the elastic strain energy and contains only five independent and physically and mechanically significant parameters. Based on routine tests, five independent parameters are given. By comparing with the Tsai-Wu criterion and the published sets of experimental data, the correctness of the criterion is verified.