基于电子散斑干涉的载人航天器密封舱焊缝残余应力测试方法
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摘要
针对传统铝合金焊缝残余应力测试方法结果波动大的问题,采用电子散斑干涉法测量了5 mm厚载人航天器密封舱5A06铝合金变极性等离子弧对接和T型交叉焊缝的残余应力,分析了影响测量结果的因素,结果表明对接焊缝熔合线附近残余应力接近5A06屈服强度(约160 MPa);T型焊缝远离交叉区域,残余应力分布规律接近对接焊缝;在交叉区域附近,由于平行、垂直焊缝方向的残余应力的相互影响,这一区域焊缝残余应力状态十分复杂,且由于残余应力叠加,使得在部分小区域内残余应力值超过材料屈服强度。
The measurement of the residual stress in aluminum alloy weld measured by traditional method has the large fluctuation problem. So, the Electronic Speckle Pattern Interferometry method was used to measure the residual stress distribution of 5 mm thick 5 A06 aluminum alloy with variable polarity plasma arc butt and cross welds in Manned Spacecraft Cabin.The factors affecting the measurement results were analyzed. The results show that the residual stress near the fusion line of the butt weld was close to the 5 A06 yield strength(about 160 MPa);As to the T type weld, the distribution of residual stress away from the cross area iswas close to that of the butt weld.Near the cross area, the residual stress was very complex because of the interaction of residual stresses in parallel and vertical welding directions. Due to the superposition of residual stresses, the residual stress in some small areas was larger than the yield strength.
The measurement of the residual stress in aluminum alloy weld measured by traditional method has the large fluctuation problem. So, the Electronic Speckle Pattern Interferometry method was used to measure the residual stress distribution of 5 mm thick 5 A06 aluminum alloy with variable polarity plasma arc butt and cross welds in Manned Spacecraft Cabin.The factors affecting the measurement results were analyzed. The results show that the residual stress near the fusion line of the butt weld was close to the 5 A06 yield strength(about 160 MPa);As to the T type weld, the distribution of residual stress away from the cross area iswas close to that of the butt weld.Near the cross area, the residual stress was very complex because of the interaction of residual stresses in parallel and vertical welding directions. Due to the superposition of residual stresses, the residual stress in some small areas was larger than the yield strength.
引文
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[3] 潘红良, 李培宁, 李炜. 焊接残余应力测试方法的研究[J]. 压力容器, 1991(2): 36-39.Pan Hongliang, Li Peining, Li Wei. Study on the testing method of welding residual stress[J]. Pressure Vessel Technology, 1991(2): 36-39.(in Chinese)
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[5] 李华. 盲孔法测量非均匀残余应力时释放系数的研究[D].合肥:合肥工业大学,2012.Li Hua.Study on the Release Coefficient of Non Uniform Residual Stress Measured by Blind Hole Method[D]. Hefei: Hefei University of Technology, 2012.(in Chinese)
[6] 陈玲玲, 杨吟飞, 何宁, 等. 基于电子散斑干涉术的残余应力测量[J]. 传感器与微统, 2010, 29(01): 108-110+113.Chen Lingling, Yang Yinfei, He Ning, et al. Residual stress measurement based on electronic speckle pattern interferometry[J]. Transducer and Microsystem Technologies, 2010, 29(01): 108-110+113.(in Chinese)
[7] 侯海量, 朱锡, 刘润泉. 盲孔法测量焊接残余应力应变释放系数的有限元分析[J]. 机械强度, 2003(6): 632-636.Hou Hailiang, Zhu Xi, Liu Runquan. Fem analysis on the strain release factors for measuring welding residual stresses using blind-hole method[J]. Journal of Mechanical Strength, 2003(6): 632-636.(in Chinese)
[2] 赵东升, 黄震宇, 缪唐军, 等. 焊接残余应力的非接触无损测量实验[J]. 实验室科学, 2017, 20(2): 26-28.Zhao Dongsheng, Huang Zhenyu, Miao Tangjun, et al. Experiment for non-contact and nondestructive measurement of welding residual stress[J]. Laboratory Science, 2017, 20(2): 26-28.(in Chinese)
[3] 潘红良, 李培宁, 李炜. 焊接残余应力测试方法的研究[J]. 压力容器, 1991(2): 36-39.Pan Hongliang, Li Peining, Li Wei. Study on the testing method of welding residual stress[J]. Pressure Vessel Technology, 1991(2): 36-39.(in Chinese)
[4] 王庆明, 孙渊. 残余应力测试技术的进展与动向[J]. 机电工程, 2011, 28(1): 11-15+41.Wang Qingming, Sun Yuan. Research development on the test methods of residual stress[J]. Journal of Mechanical & Electrical Engineering, 2011, 28(1): 11-15+41.(in Chinese)
[5] 李华. 盲孔法测量非均匀残余应力时释放系数的研究[D].合肥:合肥工业大学,2012.Li Hua.Study on the Release Coefficient of Non Uniform Residual Stress Measured by Blind Hole Method[D]. Hefei: Hefei University of Technology, 2012.(in Chinese)
[6] 陈玲玲, 杨吟飞, 何宁, 等. 基于电子散斑干涉术的残余应力测量[J]. 传感器与微统, 2010, 29(01): 108-110+113.Chen Lingling, Yang Yinfei, He Ning, et al. Residual stress measurement based on electronic speckle pattern interferometry[J]. Transducer and Microsystem Technologies, 2010, 29(01): 108-110+113.(in Chinese)
[7] 侯海量, 朱锡, 刘润泉. 盲孔法测量焊接残余应力应变释放系数的有限元分析[J]. 机械强度, 2003(6): 632-636.Hou Hailiang, Zhu Xi, Liu Runquan. Fem analysis on the strain release factors for measuring welding residual stresses using blind-hole method[J]. Journal of Mechanical Strength, 2003(6): 632-636.(in Chinese)