湖南大学学报（自然科学版）2018，Vol.45Issue(6)：28-34,7.DOI:10.16339／j.cnki.hdxbzkb.2018.06.004
铸造残余应力对铝合金副车架疲劳寿命的影响*
Effect of Casting Residual Stress on Fatigue Life of Aluminum Alloy Sub-frame
摘要
Abstract
The residual stress field of aluminum alloy sub-frame was obtained through its casting process simulation by the software ProCast.Then,the residual stresses were loaded into the finite element model of aluminum alloy sub-frame for the mechanical analysis through the intermediate files as the initial condition.The fatigue life of the sub-frame was analyzed by using HyperMesh,ABAQUS,Fe-Safe and so on.The results showed that the residual stress decreased the working life in the longitudinal,lateral and vertical conditions by 48％,71.3％and 32.5％,respectively.A bench test on the sub-frame was also per-formed.The results showed that the fatigue simulation results of residual stress were closer to the results of the bench test,and the performance index of the aluminum sub-frame satisfied the practical require-ments.Therefore,the fatigue simulation considering the residual stress provides significance for the vacu-um die casting aluminum alloy sub-frame production.关键词
铝合金副车架/铸造数值模拟/残余应力/疲劳寿命Key words
aluminum alloy sub-frame/casting numerical simulation/residual stress/fatigue lifetime分类
矿业与冶金引用本文复制引用
刘金水,雷衡兵,高文理,刘后尧,吴湛方,蒲全付..铸造残余应力对铝合金副车架疲劳寿命的影响*[J].湖南大学学报（自然科学版）,2018,45(6):28-34,7.基金项目
国家自然科学基金资助项目(51474195,51271076,51474101),National Natural Science Foundation of China(51474195,51271076,51474101) （51474195,51271076,51474101）
