Journal of Advanced Research in Ocean Engineering

Korean Society of Ocean Engineers (한국해양공학회)
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Finite Element Model to Simulate Crack Propagation Using Interface Elements and Its Verification in Tensile Test

  • Chu, Shi (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Yu, Luo (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Zhen, Chen (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University)
  • Received : 2014.12.17
  • Accepted : 2015.02.23
  • Published : 2015.03.31
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Abstract

Since the crack generation and its propagation caused by welding defects is one of the main hull damage patterns, the simulation of crack propagation process has an important significance for ship safety. Based on interface element method, a finite element model to simulate crack propagation is studied in the paper. A Lennard-Jones type potential function is employed to define potential energy of the interface element. Tensile tests of steel flat plates with initial central crack are carried out. Surface energy density and spring critical stress that are suitable for the simulation of crack propagation are determined by comparing numerical calculation and tests results. Based on a large number of simulation results, the curve of simulation correction parameter plotted against the crack length is calculated.

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References

  1. C. Qiang, C. H. Hong and H. H. Bo, A research on the interatomic potential in molecular dynamics (MD), Journal of Tianjin Institute of Technology, 2004, 02.
  2. CHEN Xin, Fracture and Gradient Enhanced Damage Model in Interface Stress Element Method and Its Application in Engineering, PhD thesis, Tsinghua University, 2004, 56-57.
  3. H. MURAKAWA, H. SERIZAWA, Z. WU and M. SHIBAHARA, Strength Analysis of Joints between Dissimilar Materials Using Interface Elements, Transactions of JWRI, Vol.29, 2000, No.2.
  4. H. MURAKAWA, S. Hisashi and K. Kazuaki, Simple Finite Element Model to Study Influence of Microstructure upon Ductility of Duplex High Strength Steel, Transactions of JWRI, Vol.36, 2007, No.2.
  5. H. Serizawa, M. Ando, C. A. Lewinsohn, and H. Murakaw，Computational analysis of creep fracture deformation in SiC/SiC composites, Journal of Nuclear Material Vol. 289, 2001, 16-22. https://doi.org/10.1016/S0022-3115(00)00677-2
  6. SONG Dan, NUMERICAL SIMULATION OF CRACK PROPAGATION AND FRACTURE OF PLATE UNDER AXIAL TENSION, Master thesis, Shanghai Jiao Tong University, 2012.
  7. WANG Zi Qiang and CHEN Shao Hua, Advanced fracture mechanics, 2009, 5-7.