功能梯度涂层滚压强化的有限元分析

Finite Element Analysis on Functionally Graded Coating Rolling Strengthening

在功能梯度涂层模型的基础上引入了刚性轧辊,建立了功能梯度涂层滚压强化的力学分析模型,并研究功能梯度涂层的非均匀材料参数、滚压速度对其涂层的等效应力和残余应力的影响,通过计算表明,非均匀材料参数对涂层前部和后部的等效应力有明显的影响,而对涂层中部基本没有影响;在整个涂层表面的残余应力是不相等的,最大等效残余应力为400MPa,最小等效残余应力为30MPa,两者相差近10倍,而滚压速度对于涂层的等效应力没有影响。这为滚压强化功能梯度涂层材料的设计提供了理论支持。

A rigid roller was introduced into the functionally graded coating modeling, and the mechanical model of functionally graded coating rolling strengthening was established, and the effect of non-uniform parameter and rolling speed on equivalent stress and residual stress of functionally graded coating was studied. The calculation results showed that nonuniform parameter affected the equivalent stress of the front and rear part of coating greatly and did not affect the central part, that the residual stresses of the whole coating surface varied, the maximum equivalent residual stress was 400MPa, and the minimum value was 30MPa, and that rolling speed had no effect on equivalent stress of coating. It provided a theoretical support for the design of rolling strengthening functionally graded coating.