请大神指点一下,小弟计算完温差场,求解热应力的时候,计算出的应力值有点偏大。热应力除了受温度梯度的影响,还有那些因素影响啊?是不是与物性参数的设置也有很大关系啊?麻烦大神指点一下,怎么样才能计算出来的值低一些。计算出来的应力值与屈服强度差不多啊3.18E8帕
MPTEMP,1,20,100,250,400,550,700,
MPTEMP,7,850,1000,1200,1400,1600,2600, !定义材料属性温度范围
MPDATA,EX,1,1,2.08E11,2.05E11,2.00E11,1.86E11,1.79E11,1.62E11, !弹性模量(Pa)
MPDATA,EX,1,7,1.27E11,1.78E10,0.78E10,10E6,5E6,1E6,
MPDATA,NUXY,1,1,0.30,0.30,0.31,0.31,0.31,0.31, !泊松比
MPDATA,NUXY,1,7,0.31,0.32,0.32,0.32,0.33,0.33,
MPDATA,ALPX,1,1,12.8E-6,12.8E-6,13.5E-6,13.9E-6,14.2E-6,14.4E-6, !热膨胀系数
MPDATA,ALPX,1,7,15.1E-6,16.1E-6,16.1E-6,16.2E-6,16.5E-6,17.0E-6,
TB,BISO,1,6,2,
TBTEMP,25
TBDATA,,3.08E8,4.08E9,,,,
TBTEMP,315
TBDATA,,2.46E8,1.86E9,,,,
TBTEMP,760
TBDATA,,2.07E8,1.62E9,,,,
TBTEMP,1200
TBDATA,,0.65E8,0.78E8,,,,
TBTEMP,1400
TBDATA,,0.05E8,0.01E6,,,,
TBTEMP,2600
TBDATA,,0.01E8,0.05E6,,,, |