問題詳情
24.某個應力狀態表示為σx = -20MPa，σ y = 90MPa，τ xy = 60MPa。則最大主應力面與 x 軸的角度約為何？【提示：經由 
計算，可得 
】
(A) - 23.7°
(B) 66.3°
(C) - 47.5°
(D) 42.5°
參考答案
無參考答案
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