The standard center-cracked tensile specimens M(T)with different widths made of aluminum alloy from high-speed train were designed for fatigue crack propagation rate testing.
An experiment study was carried out to investigate the temperature field evolution of the extruded AZ31B magnesium alloy specimens under high cyclic fatigue(HCF)load basing on infrared thermographic m
As the speed of high-speed trains on electrified railways is continually increasing,malfunctions happened occasionally such as broken line accident.
The fatigue behavior of AZ31B magnesium alloy butt welded joint during high cycles fatigue testing was investigated by infrared thermography.
This paper presents an experimental approach to predict fatigue life ofAZ31B magnesium alloy butt joints based on infrared thermography.The thermographic technique is used to monitor the temperature e
Simplified FEA model for turbine groove of aircraft engine was established in this paper,dependence of material parameters on temperature was considered in the present calculation.Based on Zencrack FE
在试验所设计的焊接参数(焊速度恒为60 mm/min,搅拌头旋转速度分别为:400 r/min、600 r/min、800 r/min、1000 r/min、1200 r/min)下,对7050铝合金进行搅拌摩擦焊接(Friction Stir Welding,FSW)。之后借助MM-W1立式万能磨损试验机,采用销-盘式摩擦磨损方式,在室温干摩擦磨损及润滑摩擦磨损条件下,对比性地研究了7050铝合
电阻点焊技术广泛应用在现代机械制造中,如汽车、机车、地铁等车辆车身结构。经过多年的研究,点焊焊接接头疲劳强度和寿命预测方法的研究日趋成熟,由于点焊接头应力及疲劳分析的复杂性,目前仍然没有有效的解决手段。
采用基于断裂力学的Walker裂纹扩展公式代替Verity方法中的Paris公式,得到一种新的考虑了平均应力影响的等效结构应力Sg.焊接结构中存在着高值残余应力,平均应力对于焊接接头的疲劳寿命影响不显著,但对于非焊接缺口件,平均应力的影响是显著的.
Low cycle fatigue(LCF)tests at strain amplitude from ±0.3%to ±1.2%were performed to investigate fatigue life and fracture morphology of a 900 MPa grade high strength steel.