nullnull材 料 力 学习 题 课 (4)null舞低杨柳楼心月歌尽桃花扇底风null应力状态
分析
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习题解答 null8-2(a)解:解毕null8-2(b)解:解毕null8-2(c)解:解毕null8-6解:解毕null8-8(a)解:解毕null8-9已知:解:求: (1)A,B,C处的应力图 (2)各点主应力的大小和方向 null主应力的方向为水平方向,铅垂方向及垂直于屏幕方向. A点:nullB点:nullnullC点:解毕null8-11(a)解:解毕求主应力,最大正应力和最大切应力null8-11(b)解:解毕求主应力,最大正应力和最大切应力屏幕平面内的两个主应力为:另一个主应力为:null8-14解:已知:求:null8-14解:已知:求:解毕null8-16 对如图均匀变形的板，求：
① 厚度的改变量；
② 板面积的改变量；
③ 体积的改变量。板中各方向上的应变null厚度的改变量板面积的改变量体积的改变量解毕null8-17求:解:解毕nullSolve : Suppose C is an abtrary point on the line AB , its state of stress can be shown in the follows figure .8-20 A bar was acted by an axial force P shown follows , known E and v of the material , determine the tension of line AB . nullAcoorging to the generalized Hook’s law , follows result can be attained . Because C is an abtrary point on the line AB , so the normal strain along the line AB is uniform . Acoorging to the difinition of normal strain we can get : nullThe tension of line AB is :nullSolve : The stat of stress at point K is pure shearing .nullAcoorging to the generalized Hook’s law , follows result can be attained . null
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