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基于非调质钢48MnV的磨削强化试验,对其强化后试样的残余应力进行了测试。应用非线性瞬态有限元法计算了48MnV钢工件在移动热源作用下的温度场,然后应用热弹塑性有限元法计算了工件在热作用和磨削力耦合下的残余应力分布。结果表明,磨削强化表面存在残余压应力,并分析了存在压应力的原因;模拟结果与试验结果相比,误差在标准范围内。
Based on the grinding strengthening test of non-quenched and tempered steel 48MnV, the residual stress of the strengthened sample was tested. The nonlinear transient finite element method was used to calculate the temperature field of 48MnV steel under the action of moving heat source. Then the residual stress distribution of the workpiece under the coupling of thermal action and grinding force was calculated by using thermo-elasto-plastic finite element method. The results show that there are residual compressive stress on the grinding surface and the reason of compressive stress is analyzed. Compared with the experimental results, the error is within the standard range.