应变空间中的岩土屈服准则与本构关系
Geotechnical Yield Criteria and Constitutive Relations in Strain Space
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摘要: 本文从Илъюшин公设出发评述了在应变空间中研究岩土弹塑性问题的必要性和特点.建立了应力不变量与弹性应变不变量之间的关系式,实现了应力屈服面到应变屈服面的转换,导出和讨论了十二个以应力表达的屈服准则的应变表达式.应用正交法则导出了十二个与上述应变屈服准则相联系的理想塑性材料的本构关系.本文工作的结果可供实际应用,并有助于应变空间塑性理论的进一步研究.Abstract: Based on Ilyushin's postulate, this paper deals with the necessity and features of researching the geotechnical elasto-plastic theory in strain space. In the paper, we established the relations between stress in variants and elastic strain invariants, brought about the transformation from the stress yield surfaces into the strain yield surfaces, derived and discussed the strain expressions from 12 yield criteria expressed by stress. By normality rule, we also derived 12 constitutive relations for ideal plastic materials associated with the above expressions. The results presented here can be applied to practice and are helpful to the study of the plastic theory in strain space.
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