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ansys求解出的熱應(yīng)力偏大 已有1人參與
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請大神指點(diǎn)一下,小弟計算完溫差場,求解熱應(yīng)力的時候,計算出的應(yīng)力值有點(diǎn)偏大。熱應(yīng)力除了受溫度梯度的影響,還有那些因素影響啊?是不是與物性參數(shù)的設(shè)置也有很大關(guān)系啊?麻煩大神指點(diǎn)一下,怎么樣才能計算出來的值低一些。計算出來的應(yīng)力值與屈服強(qiáng)度差不多啊3.18E8帕![]() ![]() MPTEMP,1,20,100,250,400,550,700, MPTEMP,7,850,1000,1200,1400,1600,2600, !定義材料屬性溫度范圍 MPDATA,EX,1,1,2.08E11,2.05E11,2.00E11,1.86E11,1.79E11,1.62E11, !彈性模量(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, !熱膨脹系數(shù) 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,,,, |
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