学院、系 专业班级 学号 姓名
评分标准:(1)计算外力偶矩和扭矩正确得4分; (2)计算AC段和BC段轴横截面的极惯性矩正确得4分; 求横截面边缘处剪应力正确得8分,其中切应力公式4分,结果2分; (3)求CB段横截面内边缘处的剪应力正确得4分,其中公式3分,结果1分。 六、计算题(本题满分18分) 解: ①画杆件轴力图(6分) 杆件轴力图如图 ··································································································密·封·线· ②求杆内最大正应力(6分) FNmax50????0.1Mpamax A500③求CD段轴向变形量,(6分) △l2?FN2L??40?100?6??40?10mm3EA200?10?500评分标准:(1)只计算轴力得3分,画杆件轴力图正确得6分; - 5 -