在此基础上，给出几何非线性问题元胞单元法和接触非线性问题元胞单元法较详细的计算步骤。
On the basis of it, the detailed calculation processes are given about the geometric nonlinearity cellular element method and contact nonlinearity cellular element method.
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.
接触问题是非线性问题，涉及到应力集中、局部边界非线性、切向力的不可逆性等一系列非线性问题。
The contact problems are non-linear problems, which relate to stress concentration, local boundary nonlinear, no-reversibility of shear force, and so on.
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