不同应力路径下旋转硬化方程的统一表示及验证

在收集到的大量试验数据的基础上,结合旋转硬化表达式,提出一个适用于不同应力路径下的旋转硬化表达式,该公式中共有两个参数,通过理论分析得到这两个参数的确定方法。将该公式导入修正剑桥模型来模拟土体在不同加载路径下的应力应变行为,将模拟结果与试验结果进行对比,结果显示,采用该旋转硬化表达式的各向异性本构模型得到的结果与试验结果均吻合较好,从而验证了该旋转硬化表达式的合理性。

Unified expression and verification of rotational hardening equations under different stress paths

Based on the collected series of experimental data and many well-known rotational hardening expressions, a rotational hardening expression for different stress paths is proposed, mainly including 2 parameters which can be determined in a direct way through analysis. The proposed rotational hardening expression has been implemented to the MCC model and adopted to represent the stress-strain behavior of clays under different loading paths. The simulations are compared with the experimental results. The comparisons show that the simulated results with this proposed method have good agreement with the experimental results, verifying the rationality of the proposed rotational hardening expression.