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| 盲孔法中应变释放系数的有限元模拟标定 | |
| 引用本文： | 马雯波,陈曙光,刘荟琼,林稳,沈玉龙,刘吉普.盲孔法中应变释放系数的有限元模拟标定[J].焊接学报,2011,32(2):97-100. |
| 作者姓名： | 马雯波 陈曙光 刘荟琼 林稳 沈玉龙 刘吉普 |
| 作者单位： | 1. 湘潭大学,机械工程学院,湘潭,411105;湖南省特种设备检测中心,长沙,410000 2. 湖南省特种设备检测中心,长沙,410000 3. 湘潭大学,机械工程学院,湘潭,411105 |
| 基金项目： | 湖南省特种设备检测中心基金资助项目(07KH/KH01049) |
| 摘 要： | 盲孔法测量焊接残余应力时,孔周围材料超过屈服状态,产生塑性变形而引入塑性附加应变,使得测量结果产生较大误差.根据应变释放系数A,B试验标定原理,对Q345R钢进行试验标定.以一定应力状态下形状改变比能系数S作为判据,对应变释放系数A,B进行修正,使得焊接等高残余应力的测量结果更为精确.基于强度理论,应用有限元软件,对Q... |
| 关 键 词： | 盲孔法 焊接残余应力 应变释放系数 标定试验 有限元法 |
| 收稿时间： | 2009/10/9 0:00:00 |
FEM simulation of calibration on strain release coefficients in blind hole method |
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| MA Wenbo,CHEN Shuguang,LIU Huiqiong,LIN Wen,SHEN Yulong and LIU Jipu.FEM simulation of calibration on strain release coefficients in blind hole method[J].Transactions of The China Welding Institution,2011,32(2):97-100. | |
| Authors: | MA Wenbo CHEN Shuguang LIU Huiqiong LIN Wen SHEN Yulong and LIU Jipu |
| Affiliation: | MA Wenbo1,2,CHEN Shuguang2,LIU Huiqiong2,LIN Wen2,SHEN Yulong1,LIU Jipu1(1.School of Mechanical Engineering,Xiangtan University,Xiangtan 411105,China,2.Hunan Special Equipment Inspection & Testing Center,Changsha 410000,China) |
| Abstract: | The significant error of the measuring result may arise when measuring welding residual stress by means of the blind hole method.Because the stress around the hole exceed the yield limit,the plastic deformation induces plastic strain.Therefore,based on the principle of the calibration experiment,the strain release coefficients A and B of the steel Q345R are determined.According to the energy parameter S,the strain release coefficient A and B can be revised by the variation formulas;by this method,the result... |
| Keywords: | blind-hole method welding residual stress strain release coefficient calibration experiment finite element method |
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