圆截面杆ABC轴向受力如图5-5所示。已知杆BC的直径d=100mm,AB杆的直径为2d。杆的最大拉应力是()。 A. 40MPa B. 30MPa ...

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问题 圆截面杆ABC轴向受力如图5-5所示。已知杆BC的直径d=100mm,AB杆的直径为2d。杆的最大拉应力是()。
选项 A. 40MPa B. 30MPa C. 80MPa D. 120MPa
答案 A
解析 提示:求出最大轴力,按正应力公式计算。
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