TY - JOUR
T1 - Fatigue life optimization for spot-welded structures of vehicle body considering uncertainty of welding spots
AU - Liu, Zhicheng
AU - Jiang, Chao
AU - Li, Yuan
AU - Bai, Yingchun
N1 - Publisher Copyright:
©, 2015, China Mechanical Engineering Magazine Office. All right reserved.
PY - 2015/9/25
Y1 - 2015/9/25
N2 - Fatigue life interval optimization analysis model with two types of welded structures: tensile-shear(TS) and modified tensile shear(MTS) spot welded joints would be constructed based on interval optimization method, considering uncertainty of the welding spots. Using the modified Manson-Coffin formula as fatigue life calculation method of spot welded structures, taking consideration of the characteristics that the uncertainty of welding torch placement during the process, the positions of the welding spots were treated as interval variables. By interval optimization of welding spot coordinates, maximum fatigue life and best welding spot coordinates of the two types of welded structures could be obtained. Further more, corresponding upper and lower fatigue life bounds of the standard sample welded structures were also demonstrated. A computing tool with function of analysis and optimal design of the fatigue life was provided, which could be applied on spot welded structures in engineering practices.
AB - Fatigue life interval optimization analysis model with two types of welded structures: tensile-shear(TS) and modified tensile shear(MTS) spot welded joints would be constructed based on interval optimization method, considering uncertainty of the welding spots. Using the modified Manson-Coffin formula as fatigue life calculation method of spot welded structures, taking consideration of the characteristics that the uncertainty of welding torch placement during the process, the positions of the welding spots were treated as interval variables. By interval optimization of welding spot coordinates, maximum fatigue life and best welding spot coordinates of the two types of welded structures could be obtained. Further more, corresponding upper and lower fatigue life bounds of the standard sample welded structures were also demonstrated. A computing tool with function of analysis and optimal design of the fatigue life was provided, which could be applied on spot welded structures in engineering practices.
KW - Interval optimization
KW - Spot welded structure
KW - Structure fatigue life
KW - Uncertainty of welding spot
UR - http://www.scopus.com/inward/record.url?scp=84945137201&partnerID=8YFLogxK
U2 - 10.3969/j.issn.1004-132X.2015.18.024
DO - 10.3969/j.issn.1004-132X.2015.18.024
M3 - Article
AN - SCOPUS:84945137201
SN - 1004-132X
VL - 26
SP - 2544
EP - 2549
JO - Zhongguo Jixie Gongcheng/China Mechanical Engineering
JF - Zhongguo Jixie Gongcheng/China Mechanical Engineering
IS - 18
ER -