Study on Cyclic Constitutive Model for GH4169 Alloy

被引：0
|
作者：
Lu K.-H. [1 ]
Zhang H.-J. [1 ]
Jia P.-C. [1 ]
机构：
[1] College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2019年 / 40卷 / 02期
关键词：
Alloy; Cyclic stress; Elastic stress; Implicit integration algorithm; Loading condition; Strain curve;
D O I：
10.13675/j.cnki.tjjs.180055
中图分类号：
学科分类号：
摘要：
In order to study the inelastic response behaviors of GH4169 alloy under different loading conditions at high temperature, the uniaxial tension and low cycle fatigue tests were carried out at 650℃. The Bodner-Partom (B-P) unified constitutive theory was used to simulate the mechanical behaviors of GH4169 alloy. Through the experiment, the uniaxial tension stress-strain data and the cyclic stress-strain data at the half-strain amplitudes of 0.65%, 0.75%, and 0.85% were obtained. Based on the B-P theory and the finite element method, the new implicit integration algorithm for constitutive equations were studied by introducing a reduction factor that is between 0 and 1. The B-P model was implemented in ABAQUS software through UMAT subroutine. Numerical simulation curves of GH4169 alloy under different loading conditions were calculated. The calculated results agree well with the experimental results, indicating that the B-P model can reasonably describe such kinds of high temperature mechanical behaviors of GH4169 alloy, and verify the integrity of the B-P model and the correctness of the program. © 2019, Editorial Department of Journal of Propulsion Technology. All right reserved.
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页码：416 / 423
页数：7
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