An exploratory discussion is presented on the application of egg-shaped function in elasto-plastic constitutive analysis for soft clay. Two main tasks of the paper are: 1) to propose a complete yield criterion based on egg-shaped function and supplement its definition in the deviatoric section, and then a yield criterion suitable for 3D stress conditions is obtained; 2) to elaborate its numerical implementation based on the drained triaxial tests. During the above discussion, a non-associated flow rule is proposed, in which the stress-dilatancy relationship in most classical theory is replaced by a linear dependence between the stress state parameter η and the rotation angle η of the plastic potential surface. Thereafter, isotropic and kinematic hardening behavior is considered by employing the hardening parameter H, which can be expressed as the function of plastic work Wp. Finally, comparisons between numerical results and test data on Taizhou soft clay are made to verify the effectiveness of the proposed model.

讨论了鸡蛋形函数在软黏土弹塑性本构分析中的应用。本文的两个主要任务是：1）提出一个基于蛋形函数的完整屈服准则，并在偏斜截面中补充其定义，然后得出适合3D应力条件的屈服准则；2）基于排水三轴试验阐述其数值实现。在上面的讨论中，提出了一种非关联流规则，其中大多数经典理论中的应力-剪胀关系被应力状态参数η与旋转角度η之间的线性相关性所代替。潜在的塑料表面。此后，通过采用硬化参数H来考虑各向同性和运动学的硬化行为，该参数可以表示为塑性功W p的函数。最后，将数值结果与台州软土的测试数据进行了比较，以验证所提模型的有效性。