In this paper, the semi-implicit return mapping algorithm has been developed to cope the integration of the Lade-Duncan elasto-plastic constitutive model.

• 本文在深入研究了本构数值积分算法的基础上,采用了半隐式图形返回算法,对Lade-Duncan弹塑性模型,推导了该模型的半隐式算法方程式,编写了相应的计算程序。