材料力学(单辉祖)课后习题答案.pdf

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1、第一章绪论题号页码1-3.....................................................................................................................................................11-5.................................................................................................................

2、....................................1（也可通过左侧题号书签直接查找题目与解）1-3图示矩形截面杆，横截面上的正应力沿截面高度线性分布，截面顶边各点处的正应力均为σ=100MPa，底边各点处的正应力均为零。试问杆件横截面上存在何种内力max分量，并确定其大小。图中之C点为截面形心。题1-3图解：由题图所示正应力分布可以看出，该杆横截面上存在轴力FN和弯矩Mz，其大小分别为1165F=σA=×(100×10Pa)×(0.100m×0.040m)=2.00×10N=200kNNmax22hh1133M=F(−)=Fh=

3、×(200×10N)×(0.100m)=3.33×10N⋅m=3.33kN⋅mzNN23661-5板件变形如图中虚线所示。试求棱边AB与AD的平均正应变以及A点处直角BAD的切应变。1第二章轴向拉压应力与材料的力学性能题号页码2-1.........................................................................................................................................................12-3.....

4、....................................................................................................................................................22-5..............................................................................................................................

5、...........................22-7.........................................................................................................................................................32-9..........................................................................................

6、...............................................................42-10.......................................................................................................................................................42-15......................................................

7、.................................................................................................52-16.......................................................................................................................................................62-18....................

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