对某不锈钢结构点焊车体吊挂区域,通过有限元软件HypreMesh建模,基于BS EN 12663:2000标准的疲劳工况和网格不敏感结构应力法计算出模型的疲劳寿命,结果表明:结构焊点不能满足要求。设计采用加密焊点的方法,来满足点焊接头的疲劳寿命要...
详细信息
对某不锈钢结构点焊车体吊挂区域,通过有限元软件HypreMesh建模,基于BS EN 12663:2000标准的疲劳工况和网格不敏感结构应力法计算出模型的疲劳寿命,结果表明:结构焊点不能满足要求。设计采用加密焊点的方法,来满足点焊接头的疲劳寿命要求,并通过实测加速度反应谱及雨流技术的损伤评估,证明了吊挂区域疲劳性能达到设计要求。
Using previously developed and validated finite element (FE) models, an investigation into the behaviour of stainless steel bolted connections has been carried *** net section rupture and bearing failure were *** main...
详细信息
Using previously developed and validated finite element (FE) models, an investigation into the behaviour of stainless steel bolted connections has been carried *** net section rupture and bearing failure were *** main parameters affecting net section rupture were found to be edge distance e2 and bolt configuration. It was shown thatthe ductility of stainless steel is sufficient to ensure a failure at the full fracture load (netarea x ultimate tensile strength) for both thick and thin material and hence no reduction factor is required in the design equation. This was confirmed by reliability analysis and asuitable partial safety factor has been derived. The investigation into bearing behaviour showed that the deformation response of stainless steel connections is different from that of carbon steel connections, with stainless steel exhibiting pronounced strain hardening. Thelocations of fracture initiation obtained from the numerical models match those observed during experimental studies of carbon steel and stainless steel connections. The results ofthe parametric study were utilised as the basis for the development of design provisions forbearing failure in stainless steel bolted connections, covering both cases in which deformation controls and those for which ultimate strength is the only criterion.
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