GH4169高温合金热机械疲劳循环损伤机理及数值模拟

张禄, 余志伟, 张磊成, 江荣, 宋迎东

Thermo-Mechanical Fatigue Cycle Damage Mechanism and Numerical Simulation of GH4169 Superalloy

ZHANG Lu, YU Zhiwei, ZHANG Leicheng, JIANG Rong, SONG Yingdong

图5 各向同性和非线性运动硬化示意图

Fig.5 Schematics of isotropic (a) and nonlinear kinematic (b) hardening behaviors (σ1, σ2, σ3—principal stress space coordinates; σy0—initial yield stress; R—increase in size of yield surface; σ—stress; εin—inelastic strain; χ—back stress; C—kinematic hardening modulus; γ—kinematic har-dening parameter)