非调质钢48MnV磨削强化残余应力场的试验研究及有限元仿真
Experimental Research and Simulation on Grind-hardening Residual Stress Field of 48MnV Steel
李曙生，肖冰，龚圣来
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作者单位：（1. 南京航空航天大学 机电学院，南京， 210016；2.泰州职业技术学院 机电技术学院，泰州，江苏，225300）
中文关键字：ANSYS；48MnV；磨削强化；残余应力
英文关键字：ANSYS; 48MnV; grind-hardening; residual stress
中文摘要：基于非调质钢48MnV的磨削强化试验，对其强化后残余应力进行了测试分析。利用ANSYS有限元分析软件，首先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。试验及仿真结果表明，磨削强化表面存在的残余压应力，并分析了存在压应力的原因。模拟结果与试验结果相比，误差可以接受。
英文摘要：Based on non-quenched and tempered steel 48MnV grind-hardening experiment, the residual stress of 48MnV was analyzed. By using ANSYS, the temperature distribution in workpiece of steel 48MnV under the actions of a moving thermal source, is first carried out by FEM for non-linear transient temperature field. On this basis, the residual stress distribution in the workpiece under the action of temperature variation and moving grinding loads is determined by FEM for thermo elastic-plasticity. The result shows that the existent residual stress on surface of grinding hardening is press. The reason of this is discussed. The difference between the simulated value and measured value of grind-hardening stress is acceptable.