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Computers and Concrete Volume 8, Number 1, February 2011 , pages 111-123 DOI: https://doi.org/10.12989/cac.2011.8.1.111 |
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Numerical study on concrete penetration/perforation under high velocity impact by ogive-nose steel projectile |
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Md. Jahidul Islam, Zishun Liu and Somsak Swaddiwudhipong
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| Abstract | ||
| Severe element distortion problem is observed in finite element mesh while performing numerical simulations of high velocity steel projectiles penetration/perforation of concrete targets using finite element method (FEM). This problem of element distortion in Lagrangian formulation of FEM can be resolved by using element erosion methodology. Element erosion approach is applied in the finite element program by defining failure parameters as a condition for element elimination. In this study strain parameters for both compression and tension at failure are used as failure criteria. Since no direct method exists to determine these values, a calibration approach is used to establish suitable failure strain values while performing numerical simulations of ogive-nose steel projectile penetration/perforation into concrete target. A range of erosion parameters is suggested and adopted in concrete penetration/perforation tests to validate the suggested values. Good agreement between the numerical and field data is observed. | ||
| Key Words | ||
| high velocity impact; concrete; ogive-nose projectile; perforation; penetration; element erosion. | ||
| Address | ||
| Md. Jahidul Islam: Dept. of Civil Engineering, National University of Singapore, # 1 Engineering Drive 2, Singapore 117576 Zishun Liu: Institute of High Performance Computing, Fusionopolis Way, #16-16 Connexis, Singapore 138632 Somsak Swaddiwudhipong: Dept. of Civil Engineering, National University of Singapore, # 1 Engineering Drive 2, Singapore 117576 | ||