§2-5拉(压杆内的应变能 Strain energy of Axial Forced Bar 轴向变形下的外力功 Work of external Forced in Axial Deformation: dW=dT=PN1∴W=7=m=pN故:s=「"ode Al 0 age:T=PA/= PI EA4/ 2EA21 a Ea 2E2 弹能模量 (Modulus of Resilience) o de 0 △l P8 韧性模量 Modulus of Toughness): umax=odExternal Work in Elastic Range: §2－5拉(压)杆内的应变能 Strain Energy of Axial Forced Bar 韧性模量(Modulus of Toughness) :   = = = l 0 Pd l D W T dT D l EA l EA P l T P l 2 2 2 1 2 2 D = D = = 2 2 2 1 2 2  e e E E t = = =  = e ue d e  e 0  = max 0 max e u  de 轴向变形下的外力功 Work of External Forced in Axial Deformation: ∵dW＝dT＝PdDl ∴  = = = P d Al T V T t e  e 故 0 : 弹能模量: (Modulus of Resilience)