| 基于盲孔法的水下承压结构残余应力测试研究 |
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| 引用本文： | 黄如旭,谢晓忠,张平平,祁江涛,李艳青,黄进浩.基于盲孔法的水下承压结构残余应力测试研究[J].舰船科学技术,2021(4):23-27. |
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| 作者姓名： | 黄如旭 谢晓忠 张平平 祁江涛 李艳青 黄进浩 |
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| 作者单位： | 中国船舶科学研究中心深海载人装备国家重点实验室 |
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| 基金项目： | 装备预研船舶重工联合基金资助项目(k6505)。 |
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| 摘 要： | 对盲孔法测残余应力中的等轴三角应变花应变释放系数进行有限元标定和塑性修正,得到了塑性修正后的应变释放系数;采用盲孔法对高强度钢水下承压结构典型部位的焊接残余应力进行测量,根据测试得到各测点的释放应变值,结合修正后的应变释放系数计算得到了水下承压结构典型测点的残余应力值。结果表明,水下承压结构焊缝附近纵向残余应力可达0.5倍屈服极限,周向残余应力可达0.4倍屈服极限。
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| 关 键 词： | 水下承压结构 盲孔法 三轴等角应变花 残余应力 应变释放系数 |
Research on underwater structure residual stress measurement by using blind-hole method |
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| HUANG Ru-xu,XIE Xiao-zhong,ZHANG Ping-ping,QI Jiang-tao,LI Yan-qing,HUANG Jin-hao.Research on underwater structure residual stress measurement by using blind-hole method[J].Ship Science and Technology,2021(4):23-27. |
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| Authors: | HUANG Ru-xu XIE Xiao-zhong ZHANG Ping-ping QI Jiang-tao LI Yan-qing HUANG Jin-hao |
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| Institution: | (State Key Laboratory of Deep-sea Manned Vehicles,China Ship Scientific Research Center,Wuxi 214082,China) |
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| Abstract: | The calibration and plastic correction of the strain release coefficients of triaxial equiangular strain gauge in blind-hole residual stress measurement method were presented by using finite element method. the residual stress of the high strength steel underwater structure were measured by the blind-hole method using the plastic corrected coefficients. It is shown that the longitudinal residual stress reaches approximately 0.5σs near the weld toe while the circumferential residual stress reaches approximately 0.4σs. |
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| Keywords: | underwater pressure structure blind-hole method triaxial equiangular strain gauge residual stress strain release coefficient |
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