[理工] 材料力學 解題
http://www.lib.ntu.edu.tw/exam/graduate/91/91265-3.htm
第三題
因為我看黃鈺寫的know why 中冊 我覺得他算錯了
我的算法是
先算出環向應力=297MPA
剪應力=-5600/(2*pi*(9.95)^2*0.1)=-90.0247MPA
將最小允許的角度設為X(因為我不會打那個符號)
70=297/2-297/2*cos(2x)+90.0247*sin(2x)
求出X=___ 計算機不能按方程式
是這樣嗎??
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