GH4169合金多轴热机械粘塑性本构模型及验证  

Multiaxial Thermo-mechanical Viscoplastic Constitutive Model and Verification of GH4169 Alloy

作　　者：毛有胜 李桐 贾文斌 李鑫[1] 刘飞龙 方磊[1] MAO You-sheng;LI Tong;JIA Wen-bin;LI Xin;LIU Fei-long;FANG Lei(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;College of Energy Engineering,Zhejiang Universtity,Hangzhou 310027,China)

机构地区：[1]南京航空航天大学能源与动力学院,南京210016 [2]浙江大学能源工程学院,杭州310027

出　　处：《航空发动机》2024年第3期160-168,共9页Aeroengine

基　　金：中央高校基本科研业务费专项资金(1002/DLJ2102301)资助。

摘　　要：为了更加精确地描述GH4169合金的多轴热机械力学行为,以Chaboche粘塑性本构模型为基础,引入了Lemaitre损伤模型、基于临界面理论的非比例强化因子和粘塑性势函数修正系数,提出建立了一种适用于GH4169合金的多轴热机械疲劳粘塑性本构模型,来描述材料的循环软化、非比例硬化和非玛辛效应,并给出了本构模型各参数的获取方法。采用此本构模型,对GH4169合金的多轴和热机械力学行为进行了模拟研究,结果表明:在20℃时,分别对轴向加载、扭转加载、比例加载、45°非比例加载以及90°非比例加载这5种加载条件下的第200次循环的迟滞回线进行模拟,轴向的应力峰谷值均与试验值结果吻合;在650℃时,模拟比例加载、45°非比例加载和90°非比例加载这3种加载条件下的第200次循环的迟滞回线,结果与试验值基本吻合,证明了建立的模型适用于高温条件;模拟300℃、550℃和650℃这3种温度下的单轴轴向加载和圆形路径加载的迟滞回线,结果与试验值基本吻合;模拟同相位与反相位加载条件下的第200次循环迟滞回线,修正后的本构模型的模拟值与试验值吻合良好。In order to describe the multiaxial thermo-mechanical behavior of GH4169 alloy more accurately,based on the Chaboche viscoplastic constitutive model,by introducing the Lemaitre damage model,the non-proportional strengthening factor based on critical plane theory,and the viscoplastic potential function correction coefficient,a multiaxial thermo-mechanical fatigue viscoplastic constitu⁃tive model suitable for GH4169 alloy was proposed to describe cyclic softening,non-proportional hardening,and non-Masing behavior of the material,and the method for obtaining the parameters of the constitutive model was provided.This constitutive model was used to simulate the multiaxial and thermo-mechanical behavior of GH4169 alloy.The results show that at 20℃,for the simulations of the hysteresis loops of the 200th cycle under five loading conditions(axial loading,torsional loading,proportional loading,45°nonproportional loading,and 90°non-proportional loading),the results of the axial stress peaks and valleys are consistent with the experimental results;at 650℃,for the simulation of the hysteresis loops of the 200th cycle under three loading conditions(proportional loading,45°non proportional loading,and 90°non proportional loading),the results are basically consistent with the experimental results,proving that the established model is suitable for high temperature conditions;for the simulations of the hysteresis loops of uniaxial axial loading and circular path loading at 300℃,550℃,and 650℃,the results are basically consistent with the experimental values;for the simulations of the hysteresis loops of the 200th cycle under in-phase and antiphase loading conditions,the simulated values of the corrected constitutive model are in good agreement with the experimental values.

关 键 词：GH4169 多轴疲劳 热机械疲劳 Chaboche模型 Lemaitre损伤模型 临界面理论 粘塑性势函数修正系数 

分 类 号：V231.95[航空宇航科学与技术—航空宇航推进理论与工程]