Abstract No.C181010-267
Author name(s): Zeping WANG1,2, Zhiqiang HU3, Kun LIU4, Gang CHEN1,5
Company: 1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, China; 2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration (CISSE), China; 3. Newcastle University, UK; 4. Jiangsu University of Science and Technology, China; 5. Marine Design & Research Institute of China, China
The application of the finite element numerical simulation technology in ship collision and grounding simulations is becoming more and more widely. How to reasonably define the failure criterion of steel plate is an important issue in finite element technology. A constitutive model based on the Johnson-Cook and Gurson- Tvergaard-Needleman (GTN) equations is implemented as a user-defined material model within code LS-DYNA. These constitutive equations include the Johnson-Cook model combined with the ductile fracture process of void nucleation and coalescence prevalent in the GTN model. Then, the updated LS-DYNA program was used to analyze the dynamic response of quasi-static tensile test and ASIS model test. By the comparison of numerical simulation results with the experiment results, it is found that the proposed model can describe the structural damage accurately, which proves the applicability in ship collision and grounding simulations.
KEY WORDS: ship grounding and collision; numerical simulation; material failure criteria; Johnson-Cook; Gurson- Tvergaard-Needleman; LS-DYNA
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