摘要
采用有限元软件ABAQUS计算分析了螺帽施加扭矩拧紧法和螺栓杆部直接施加预紧力拉伸加载两种加载方法对螺栓关键部位应力值的影响,并与试验结果进行比较。结果表明:如果只关心杆部拉应力值,则可采用直接拉伸加载的方式加载,以达到减小计算量和降低收敛难度的效果;如还需要关心螺栓杆部切应力或倒角处的Mises等效应力,则两种加载方式不可以互换。
Using FEM analysis software ABAQUS to calculate and analyze the int]uence of two loading methods on the key part of bolt, which are the tightening method of applying torque on the nut and direct- ly applying pre-tightening force tensile loading on the bolt bar, and the simulation results are compared with the test results. It shows that if the stress on the bolt bar is the only consideration, the second meth- od is applicable to achieve the goal of reduce calculation quantity, and decrease the difficuhy of conver- gence; if the shearing stress and Mises equivalent stress at the chamfer should also be taken into consid- eration, then the two loading method are not changeable.
出处
《柴油机》
2014年第1期38-42,共5页
Diesel Engine
