ch2 弹塑性力学

,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Tianjin University,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,Click to edit Master title style,Tianjin University,*,工程弹塑性力学,第二章 应力状态与应变状态,2.1,应力状态,2.2,应变状态,2.1,应力状态,1.,应力张量,体力：,面力：,3,2.1,应力状态,应力：,正应力：,剪应力：,2.1,应力状态,应力张量的概念：,在,o,点处取一个微元体,5,2.1,应力状态,应力张量的概念：,6,2.1,应力状态,应力张量的概念：,7,2.1,应力状态,应力张量的概念：,注意“,+,、,-”,号,8,2.1,应力状态,应力张量的概念：,在,o,点处取一个微元体,对称的二阶张量,9,2.1,应力状态,2.,已知某点的应力张量，可求此点任一平面上的应力,10,2.1,应力状态,设某平面法线的方向余弦：,总应力,P,：,11,2.1,应力状态,12,2.1,应力状态,3.,主平面、主应力、主轴,13,2.1,应力状态,14,2.1,应力状态,得三个主方向。,可证得三个主平面是互相垂直的。,以三个主方向为坐标轴，建立主坐标系。,15,2.1,应力状态,16,2.1,应力状态,4.,应力分解,17,2.1,应力状态,18,2.1,应力状态,5.,八面体上的应力状态,在,o,点的主坐标系中，与三个坐标轴成相同夹角的平面,19,2.1,应力状态,等效应力（应力强度,）：,20,2.1,应力状态,6.,斜面,上的应力状态,其法线方向：主坐标系中，与两个坐标轴成,45,度，与另一坐标轴成,90,度。,21,2.1,应力状态,7.,表示应力状态的,Lode,参数,22,2.2,应变状态,1.,应变张量,23,2.2,应变状态,24,2.2,应变状态,25,2.2,应变状态,26,2.2,应变状态,2.,应变张量的分解,27,2.2,应变状态,3.,八面体上的应变状态,28,2.2,应变状态,4.,斜面,上的应变状态,29,2.2,应变状态,5.,表示应变状态的,Lode,参数,30,谢谢！,