主应力轴旋转情况下土的各向异性理论研究进展

Theoretical Progress of Soil's Anisotropy Study Under Principal Stress Rotation

从理论方面,对国内外主应力轴旋转情况下土的各向异性研究进行了对比和总结,并提出了一些研究建议。指出在理论方面,应当对屈服面方程采用应力分量表示的模型在三维空间里进行屈服面性状的描述,同时考虑不同加载方向下屈服面的变化特性以及旋转硬化的问题,并应开展对加载方向变化时土体屈服面变化特性的实验研究及理论验证。

Theoretically, this paper has compared and summarized soil＇s anisotropy under principal stress rotation Inome and abroad and proposed some research suggestions. It pointes out that in theory, the three-dimentioual description of the yield suface of constitutive model whose yield snrface equation is expressed by stess components should be described and the yield surfaces under different load directions as well as rotational hardening shonld be taken into account. Meanwhile, to verify the theoretical research, experimental studies of the variable characteristics of yield surfaces under different load directions are also put into consideration.