摘要
基于热弹塑性理论,借助有限元分析方法,建立了压路机压轮的有限元模型,模拟了压轮焊后的变形和残余应力分布;采用盲孔法测试了压轮的残余应力,并与模拟结果进行了对比。结果表明:两封口板发生焊后变形呈外凸状,最大变形量为5.732mm;压轮焊后起收弧位置和焊缝位置的残余应力大,应力峰值为416.40 MPa;随着距卷圆板自由边距离的增大,卷圆板直焊缝中心位置的残余应力先增大后减小再增大,残余应力测试值与模拟值较吻合,证明了模拟结果的准确性。
On the basis of thermo elastic plastic theory and finite element analysis method,the finite element model of the press wheel was established and the welding deformation and residual stress distributions of the pressure wheel were simulated.The residual stresses of the pressure wheel were measured by a blind-hole method and compared with those by simulation.The results show that two sealing plates had a convex shape due to the welding deformation.The maximum deformation amount was 5.732 mm.The residual stresses at the welding arc and weld seam of the pressure wheel after welding were relatively large.The peak value of stresses was 416.40 MPa.With increasing distance from the free edge of circular plate,the residual stress at the straight weld center of the circular plate first increased then decreased and then increased.The measured residual stresses coincided well with those from the simulation,indicating the accuracy of the simulation.
作者
房元斌
王勇
王灿
陆永能
FANG Yuanbin;WANG Yong;WANG Can;LU Yongneng(XCMG Jiangsu Xuzhou Engineering Machinery Research Institute, Xuzhou 221004, China;State key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery, XCMG Construction Machinery Co., Ltd., Xuzhou 221004, China;XCMG Xuzhou Mining Machinery Co., Ltd., Xuzhou 221004, China)
出处
《机械工程材料》
CSCD
北大核心
2017年第11期82-85,90,共5页
Materials For Mechanical Engineering
基金
国家科技支撑计划项目(2015BAF07B02)
关键词
压路机压轮
残余应力
有限元法
盲孔法
pressure wheel of road roller
residual stress
finite element method
blind-hole method
