就分 nalysis of stress-state and strain-state四 §7-5平面应变状态分析 (Analysis of plane strain-state) D§7-6广义胡克定律 (Generalized Hooks law) §7-7复杂应力状态的变形比能 (Strain-energy density in general stress-state §7-8强度理论( Failure criteria) □§7-9莫尔强度理论 (Mohr's failure criterion)