In this paper, an inertia-based stabilizing method is proposed to overcome the loss of numerical convergence in quasi-static simulations of fracture problems with unstable (fast or dynamic) crack propagation. The method guarantees unconditional convergence as the time increment step progressively decreases and it does not need any numerical damping or other solution enhancement parameters. It has been demonstrated, through direct simulations of several numerical examples with severe local or global instabilities, that the proposed method can effectively and efficiently overcome severe instability points unconditionally and regain stability if there exist mechanisms for stable crack propagation after passing through such instability points. In all the numerical tests, the new method outperforms other solution enhancement techniques, such as numerical damping, arc-length method, and implicit dynamic simulation method, in the solution accuracy and numerical robustness.
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October 2015
Research-Article
An Inertia-Based Stabilizing Method for Quasi-Static Simulation of Unstable Crack Initiation and Propagation
Y. C. Gu,
Y. C. Gu
Department of Civil Engineering,
Zhejiang University,
Zijingang Campus,
Hangzhou 310058, China
Zhejiang University,
Zijingang Campus,
Hangzhou 310058, China
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J. Jung,
J. Jung
Department of Mechanical and
Aerospace Engineering,
University of Miami,
Coral Gables, FL 33124
Aerospace Engineering,
University of Miami,
Coral Gables, FL 33124
Search for other works by this author on:
Q. D. Yang,
Q. D. Yang
Department of Mechanical and
Aerospace Engineering,
University of Miami,
Coral Gables, FL 33124
e-mail: qdyang@miami.edu
Aerospace Engineering,
University of Miami,
Coral Gables, FL 33124
e-mail: qdyang@miami.edu
Search for other works by this author on:
W. Q. Chen
W. Q. Chen
Department of Civil Engineering,
Zhejiang University,
Zijingang Campus,
Hangzhou 310058, China;
Zhejiang University,
Zijingang Campus,
Hangzhou 310058, China;
Department of Engineering Mechanics,
Zhejiang University,
Yuquan Campus,
Hangzhou 310027, China
Zhejiang University,
Yuquan Campus,
Hangzhou 310027, China
Search for other works by this author on:
Y. C. Gu
Department of Civil Engineering,
Zhejiang University,
Zijingang Campus,
Hangzhou 310058, China
Zhejiang University,
Zijingang Campus,
Hangzhou 310058, China
J. Jung
Department of Mechanical and
Aerospace Engineering,
University of Miami,
Coral Gables, FL 33124
Aerospace Engineering,
University of Miami,
Coral Gables, FL 33124
Q. D. Yang
Department of Mechanical and
Aerospace Engineering,
University of Miami,
Coral Gables, FL 33124
e-mail: qdyang@miami.edu
Aerospace Engineering,
University of Miami,
Coral Gables, FL 33124
e-mail: qdyang@miami.edu
W. Q. Chen
Department of Civil Engineering,
Zhejiang University,
Zijingang Campus,
Hangzhou 310058, China;
Zhejiang University,
Zijingang Campus,
Hangzhou 310058, China;
Department of Engineering Mechanics,
Zhejiang University,
Yuquan Campus,
Hangzhou 310027, China
Zhejiang University,
Yuquan Campus,
Hangzhou 310027, China
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received June 5, 2015; final manuscript received July 6, 2015; published online July 22, 2015. Editor: Yonggang Huang.
J. Appl. Mech. Oct 2015, 82(10): 101010
Published Online: July 22, 2015
Article history
Received:
June 5, 2015
Revision Received:
July 6, 2015
Citation
Gu, Y. C., Jung, J., Yang, Q. D., and Chen, W. Q. (July 22, 2015). "An Inertia-Based Stabilizing Method for Quasi-Static Simulation of Unstable Crack Initiation and Propagation." ASME. J. Appl. Mech. October 2015; 82(10): 101010. https://doi.org/10.1115/1.4031010
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