The contact problems are non-linear problems, which relate to stress concentration, local boundary nonlinear, no-reversibility of shear force, and so on.
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.
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。
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