A continuum damage mechanics (CDM) based viscoplastic constitutive model is established in this study to describe the fully coupling of creep and fatigue behavior. The most significant improvement is the introduction of a continuum damage variable into the constitutive equations, instead of considering creep damage and fatigue damage separately. The CDM-based viscoplastic constitutive material model is implemented using a user-defined subroutine (UMAT). A standard specimen is used for carrying out uniaxial creep, fatigue, and creep–fatigue interaction tests to validate the material model. In addition, to further demonstrate the capability of the material model to predict the complex material behavior, a complex strain-control loading test is performed to validate the material model. The simulated and measured results are in good agreement at different temperatures and loadings, in particular for rapid cyclic softening behavior following crack initiation and propagation.
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September 2016
Research-Article
A Continuum Damage Mechanics-Based Viscoplastic Model of Adapted Complexity for High-Temperature Creep–Fatigue Loading
Weizhe Wang,
Weizhe Wang
Key Lab of Education Ministry for
Power Machinery and Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
Power Machinery and Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
Gas Turbine Research Institute,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: wangwz0214@sjtu.edu.cn
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: wangwz0214@sjtu.edu.cn
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Patrick Buhl,
Patrick Buhl
Material Testing Institute (MPA),
University of Stuttgart,
Pfaffenwaldring 32,
Stuttgart D-70569, Germany
e-mail: Patrick.Buhl@mpa.uni-stuttgart.de
University of Stuttgart,
Pfaffenwaldring 32,
Stuttgart D-70569, Germany
e-mail: Patrick.Buhl@mpa.uni-stuttgart.de
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Andreas Klenk,
Andreas Klenk
Material Testing Institute (MPA),
University of Stuttgart,
Pfaffenwaldring 32,
Stuttgart D-70569, Germany
e-mail: Andreas.Klenk@mpa.uni-stuttgart.de
University of Stuttgart,
Pfaffenwaldring 32,
Stuttgart D-70569, Germany
e-mail: Andreas.Klenk@mpa.uni-stuttgart.de
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Yingzheng Liu
Yingzheng Liu
Key Lab of Education Ministry for
Power Machinery and Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
Power Machinery and Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
Gas Turbine Research Institute,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: yzliu@sjtu.edu.cn
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: yzliu@sjtu.edu.cn
Search for other works by this author on:
Weizhe Wang
Key Lab of Education Ministry for
Power Machinery and Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
Power Machinery and Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
Gas Turbine Research Institute,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: wangwz0214@sjtu.edu.cn
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: wangwz0214@sjtu.edu.cn
Patrick Buhl
Material Testing Institute (MPA),
University of Stuttgart,
Pfaffenwaldring 32,
Stuttgart D-70569, Germany
e-mail: Patrick.Buhl@mpa.uni-stuttgart.de
University of Stuttgart,
Pfaffenwaldring 32,
Stuttgart D-70569, Germany
e-mail: Patrick.Buhl@mpa.uni-stuttgart.de
Andreas Klenk
Material Testing Institute (MPA),
University of Stuttgart,
Pfaffenwaldring 32,
Stuttgart D-70569, Germany
e-mail: Andreas.Klenk@mpa.uni-stuttgart.de
University of Stuttgart,
Pfaffenwaldring 32,
Stuttgart D-70569, Germany
e-mail: Andreas.Klenk@mpa.uni-stuttgart.de
Yingzheng Liu
Key Lab of Education Ministry for
Power Machinery and Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
Power Machinery and Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China;
Gas Turbine Research Institute,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: yzliu@sjtu.edu.cn
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: yzliu@sjtu.edu.cn
1Corresponding author.
Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received May 10, 2015; final manuscript received December 19, 2015; published online March 22, 2016. Assoc. Editor: Herman Shen.
J. Eng. Gas Turbines Power. Sep 2016, 138(9): 092501 (10 pages)
Published Online: March 22, 2016
Article history
Received:
May 10, 2015
Revised:
December 19, 2015
Citation
Wang, W., Buhl, P., Klenk, A., and Liu, Y. (March 22, 2016). "A Continuum Damage Mechanics-Based Viscoplastic Model of Adapted Complexity for High-Temperature Creep–Fatigue Loading." ASME. J. Eng. Gas Turbines Power. September 2016; 138(9): 092501. https://doi.org/10.1115/1.4032679
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