熔敷顺序和管壁厚度对异种钢管板接头焊接残余应力与变形的影响
|
摘要
异种钢焊接接头广泛应用于机械、化工、电力和交通等领域的装备制造中,由于异种钢接头的材料不同,焊接过程中产生的残余应力分布十分复杂,但关于异种钢焊接接头残余应力的研究还很不充分。以SYSWELD有限元软件为平台,开发用于模拟异种钢焊接接头残余应力与变形的热-弹-塑性有限元计算方法。基于此方法,以异种钢管-板焊接接头为对象,研究不同熔敷顺序和管壁厚度对接头焊接残余应力与变形的影响。在数值模拟过程中,针对不同类型的材料采用不同的本构模型来模拟材料的力学行为。采用接触式三维坐标测量仪测量焊接接头特征位置的变形量,验证有限元计算方法的有效性。研究结果表明,管板接头的残余应力分布受熔敷顺序的影响十分显著,变形分布形态也在一定程度上受到了熔敷顺序的影响。随着管壁厚度的增加,圆管径向变形量反而减小,周向残余应力的峰值有所增加,同时圆管与焊缝异材界面处的周向残余应力梯度也明显增大。开发的数值模拟方法将是预测异种钢焊接接头残余应力与变形的有力工具,模拟结果将为焊接结构的健全性评价供理论支撑。
Dissimilar metal welded(DMW) joint is widely used in machinery, chemical industry, electricity and transportation. Due to different material properties of DMW joint, the residual stress distribution induced by welding is very complex. So far, the research on welding residual stress of DMW joints is still inadequate. Based on SYSWELD software, a thermal elastic plastic finite element method is developed to simulate residual stress and deformation for DMW joints. Based on the developed computational approach,the influence of deposition sequence and wall thickness of pipe on welding residual stress and deformation in a tube-plate joint is investigated. In the numerical simulations, different constitutive models are used to simulate the mechanical behavior of different types of steel. Meanwhile, the deformations of welding joint at characteristic positions are measured by using 3D contact coordinate measuring instrument, which verifies the validity of the computational approach. The results show that the residual stress distribution of the tube-plate joint is significantly affected by the deposition sequence, and the deformation distribution pattern is also affected by the deposition sequence to some extent. As the thickness of tube increases, the deformation in the radial direction decreases, and the peak value of the hoop residual stress increases. The numerical simulation method developed is a powerful tool for predicting residual stress and deformation of welding joints of different types of steel and the simulated results obtained by numerical simulation can provide theoretical support for the performance evaluation of welded structure.
Dissimilar metal welded(DMW) joint is widely used in machinery, chemical industry, electricity and transportation. Due to different material properties of DMW joint, the residual stress distribution induced by welding is very complex. So far, the research on welding residual stress of DMW joints is still inadequate. Based on SYSWELD software, a thermal elastic plastic finite element method is developed to simulate residual stress and deformation for DMW joints. Based on the developed computational approach,the influence of deposition sequence and wall thickness of pipe on welding residual stress and deformation in a tube-plate joint is investigated. In the numerical simulations, different constitutive models are used to simulate the mechanical behavior of different types of steel. Meanwhile, the deformations of welding joint at characteristic positions are measured by using 3D contact coordinate measuring instrument, which verifies the validity of the computational approach. The results show that the residual stress distribution of the tube-plate joint is significantly affected by the deposition sequence, and the deformation distribution pattern is also affected by the deposition sequence to some extent. As the thickness of tube increases, the deformation in the radial direction decreases, and the peak value of the hoop residual stress increases. The numerical simulation method developed is a powerful tool for predicting residual stress and deformation of welding joints of different types of steel and the simulated results obtained by numerical simulation can provide theoretical support for the performance evaluation of welded structure.
引文
[1]JANG C H,LEE J H,KIM J S,et al.Mechanical property variation within Inconel 82/182 dissimilar metal weld between low alloy steel and 316 stainless steel[J].International Journal of Pressure Vessels and Piping,2008,85:635-646.
[2]SONG T K,BAE H R,KIM Y J,et al.Numerical investigation on welding residual stresses in a PWRpressurizer safety/relief nozzle[J].Fatigue&Fracture of Engineering Materials&Structures,2010,33:689-702.
[3]MARLETTE S,FREYER P,SIMITH M C,et al.Simulation and measurement of through-wall residual stresses in a structural weld overlaid pressurizer nozzle[J].Journal of Pressure Vessel Technology,2014,136:1-8.
[4]明洪亮,张志明,王俭秋,等.国产核电安全端异种金属焊接件的微观结构及局部性能研究[J].金属学报,2017(1):57-69.MING Hongliang,ZHANG Zhiming,WANG Jianqiu,et al.Microstructure and local properties of a domestic safe-end dissimilar metal weld joint by using hot-wire GTAW[J].Acta Metallurgica Sinica,2017(1):57-69.
[5]DENG Dean,MURAKAWA H,LIANG Wei.Numerical and experimental investigations on welding residual stress in multi-pass butt-welded austenitic stainless steel pipe[J].Computational Materials Science,2008,42:234-244.
[6]UEDA Y,YAMAKAWA T.Analysis of thermal elasticplastic stress and strain during welding by finite element method[J].Japan Welding Society Transactions,1971,2(2):186-196.
[7]KIYOSHIMA S,DENG D,OGAWA K,et al.Influences of heat source model on welding residual stress and distortion in a multi-pass J-groove joint[J].Computational Materials Science,2009,46:987-995.
[8]YE Yanhong,CAI Jianpeng,JIANG Xiaohua,et al.Influence of groove type on welding-induced residual stress,deformation and width of ensitization region in a SUS304 steel butt elded joint[J].Advances in Engineering Software,2015,86:39-48.
[9]DENG D,OGAWA K,KIYOSHIMA S,et al.Prediction of residual stresses in a dissimilar metal welded pipe with considering cladding,buttering and post weld heat treatment[J].Computational Materials Science,2009,47:398-408.
[10]MURANSKY O,SIMITH M C,BENDEICH P J,et al.Validated numerical analysis of residual stresses in safety relief valve(SRV)nozzle mock-ups[J].Computational Materials Science,2011,50:2203-2215.
[11]DENG D,KIYOSHIMA S.FEM prediction of welding residual stresses in a SUS304 girth-welded pipe with emphasis on stress distribution near weld start/end location[J].Computational Materials Science,2010,50:612-621.
[12]Inconel-alloy-600.[2018-05-20].www.specialmetals.com/tech-center/alloy.html.
[13]SUN Jiamin,LIU Xiaozhan,TONG Yangang,et al.Acomparative study on welding temperature fields,residual stress distributions and deformations induced by laser beam welding and CO2 gas arc welding[J].Materials and Design,2014,63:519-530.
[14]DENG D.FEM prediction of welding residual stress and distortion in carbon steel considering phase transformation effects[J].Materials and Design,2009,30:359-366.
[15]邓德安.KIYOSHIMA S.退火温度对SUS304不锈钢焊接残余应力计算精度的影响[J].金属学报,2014,50(5):626-632.DENG Dean,KIYOSHIMA S.Influence of annealing temperature on calculation accuracy of welding residual stress in a SUS304 stainless steel joint[J].Acta Metallurgica Sinica,2014,50(5):626-632.
[2]SONG T K,BAE H R,KIM Y J,et al.Numerical investigation on welding residual stresses in a PWRpressurizer safety/relief nozzle[J].Fatigue&Fracture of Engineering Materials&Structures,2010,33:689-702.
[3]MARLETTE S,FREYER P,SIMITH M C,et al.Simulation and measurement of through-wall residual stresses in a structural weld overlaid pressurizer nozzle[J].Journal of Pressure Vessel Technology,2014,136:1-8.
[4]明洪亮,张志明,王俭秋,等.国产核电安全端异种金属焊接件的微观结构及局部性能研究[J].金属学报,2017(1):57-69.MING Hongliang,ZHANG Zhiming,WANG Jianqiu,et al.Microstructure and local properties of a domestic safe-end dissimilar metal weld joint by using hot-wire GTAW[J].Acta Metallurgica Sinica,2017(1):57-69.
[5]DENG Dean,MURAKAWA H,LIANG Wei.Numerical and experimental investigations on welding residual stress in multi-pass butt-welded austenitic stainless steel pipe[J].Computational Materials Science,2008,42:234-244.
[6]UEDA Y,YAMAKAWA T.Analysis of thermal elasticplastic stress and strain during welding by finite element method[J].Japan Welding Society Transactions,1971,2(2):186-196.
[7]KIYOSHIMA S,DENG D,OGAWA K,et al.Influences of heat source model on welding residual stress and distortion in a multi-pass J-groove joint[J].Computational Materials Science,2009,46:987-995.
[8]YE Yanhong,CAI Jianpeng,JIANG Xiaohua,et al.Influence of groove type on welding-induced residual stress,deformation and width of ensitization region in a SUS304 steel butt elded joint[J].Advances in Engineering Software,2015,86:39-48.
[9]DENG D,OGAWA K,KIYOSHIMA S,et al.Prediction of residual stresses in a dissimilar metal welded pipe with considering cladding,buttering and post weld heat treatment[J].Computational Materials Science,2009,47:398-408.
[10]MURANSKY O,SIMITH M C,BENDEICH P J,et al.Validated numerical analysis of residual stresses in safety relief valve(SRV)nozzle mock-ups[J].Computational Materials Science,2011,50:2203-2215.
[11]DENG D,KIYOSHIMA S.FEM prediction of welding residual stresses in a SUS304 girth-welded pipe with emphasis on stress distribution near weld start/end location[J].Computational Materials Science,2010,50:612-621.
[12]Inconel-alloy-600.[2018-05-20].www.specialmetals.com/tech-center/alloy.html.
[13]SUN Jiamin,LIU Xiaozhan,TONG Yangang,et al.Acomparative study on welding temperature fields,residual stress distributions and deformations induced by laser beam welding and CO2 gas arc welding[J].Materials and Design,2014,63:519-530.
[14]DENG D.FEM prediction of welding residual stress and distortion in carbon steel considering phase transformation effects[J].Materials and Design,2009,30:359-366.
[15]邓德安.KIYOSHIMA S.退火温度对SUS304不锈钢焊接残余应力计算精度的影响[J].金属学报,2014,50(5):626-632.DENG Dean,KIYOSHIMA S.Influence of annealing temperature on calculation accuracy of welding residual stress in a SUS304 stainless steel joint[J].Acta Metallurgica Sinica,2014,50(5):626-632.