Finite Element Simulation on Failure of Elbow Impacted by Flat-Nosed Missile

Abstract:

Finite element model of the elbow interiorly impacted by flat-nosed missile was established using ANSYS/LS-DYNA. The Cowper-Symonds model was adopted. The rupture strain failure criterion was used to define the failure process. Numerical values were compared with experimental values obtained from the literature and the reliability of model was validated. The penetration failure mode of the elbow was analyzed. Factors of the critical rupture kinetic energy E_r were acquired. It can be seen that the penetration failure mode is plugging induced by the extrusion and scraping dominated of axis stress. The effect of D_o on E_r can be neglected. E_r increases with the increase of t/D_o, D_m/t and R/D_o when the missile mass m is invariable. The effect of m on E_r should consider the factors of m and critical rupture velocity V_r.

• Periodical: Applied Mechanics and Materials (Volumes 105-107)
• Pages: 38-42
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.105-107.38
• Online since: September 2011
• Authors: Jian Liang Yu, Xing Qing Yan, Ling Chen
• Keywords: Critical Rupture Kinetic Energy, Elbow, Flat-Nosed Missile, Penetration Failure Mode

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