论文部分内容阅读
借助于商用非线性分析软件MSC.SuperForm,用弹塑性有限元法建立宽厚板热矫直与冷却过程的三维热力耦合复合模型,并对该过程进行模拟仿真,得到了钢板热矫和冷却之后的残余应力分布。分析了热矫直和冷却过程两者共同作用对钢板残余应力的影响。分析表明,热矫直后的钢板经冷却到常温状态,残余应力不仅在数值上增大,且分布规律也与热矫后有很大的差别。因此相对热矫直过程,冷却过程对残余应力的影响较大;沿板宽方向温度梯度大的地方,残余应力的分布波动有较大变化,梯度越大残余应力的值越大。
With the help of MSC.SuperForm, a commercial non-linear analysis software, a three-dimensional thermo-mechanical coupling model of hot plate straightening and cooling process was established by using the elasto-plastic finite element method. The simulation and simulation of the process showed that the hot plate straightening and cooling Residual stress distribution. The effects of the hot straightening and cooling processes on the residual stress of the steel plate are analyzed. The analysis shows that the hot straightened steel plate is cooled to normal temperature, the residual stress not only increases in value, but also has a great difference between the distribution and the hot straightening. Therefore, relative to the thermal straightening process, the cooling process has a greater impact on the residual stress. Where the temperature gradient is large along the width of the slab, the distribution of residual stress fluctuates greatly. The larger the gradient, the larger the residual stress.