Based on the nonlinear geometry field theory of continuum mechanics, this paper analyzes the stress field due to a screw dislocation in an infinite medium.
本文以非线性连续体几何场论为理论基础，分析了无限大体中一个螺位错引起的应力场。
The model include material nonlinear, geometry nonlinear and state nonlinear.
模型包括材料非线性、几何非线性、状态非线性。
Because of material nonlinear, geometry nonlinear and contacting nonlinear, the small time step is adopted to improve convergence of the calculation.
由于计算中存在着材料非线性、几何非线性以及接触非线性问题，为了提高计算的收敛性能，采用了小时间计算步长。
Because of material nonlinear, geometry nonlinear and contacting nonlinear, the small time step is adopted to improve convergence of the calculation.
由于计算中存在着材料非线性、几何非线性以及接触非线性问题，为了提高计算的收敛性能，采用了小时间计算步长。
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