A modified Stillinger–Weber potential-based hyperelastic constitutive model for nonlinear elasticity

contents材料非线性超弹性本构模型Engineering Data 设置points材料本构参数蠕变相关单元技术单元中节点Kept（保留）OR Dropped（取消） 材料非线性 在应力水平低于比例极限时，应力应变关系为线性关系，超过这一极限后，应力应变关系为非线性关系，表现为非弹性或塑性（应变不可恢复状态） 某种材料的应力应变曲线，主要材料试验有：单轴试验、等双轴试验、平面剪切试验、体积试验、松弛试验等。 超弹性本构模型 超弹性 (hyperelastic) 是指材料存在一个弹性势能函数

One of the most important reasons that make the capsule robot cannot be used in clinic is the absence of its mechanical model, especially when the capsule robot moves at a constant velocity, which is its major working condition. An analytical frictio