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• W3026095414 abstract "The adaptive finite element material point method (AFEMP) takes advantages of both finite element method (FEM) and material point method (MPM), suitable for dealing with extreme deformation problems. Use AFEMP to simulate the penetration of steel spheres and bullets into ballistic gelatin at high velocities to better understand the damage effects caused by the projectiles to biological soft tissue. Gelatin are initially divided into finite elements and then the elements are converted into MPM particles using the characteristic length ratio and the main direction maximum stretch ratio of element as conversion criteria in order to avoid elements distortion during the solution process. The effect of the background grid size on the calculation results is studied, and the background grid should be slightly smaller than finite element so that it can better describe the severely compressed gelatin. Numerical results are presented to validate the accuracy of AFEMP program of this work, and it can better simulate the temporary cavity than the commercial software LS-DYNA. The propagation of pressure wave can cause crushing and tearing damage of the gelatin. The damaged area caused by pressure wave is larger than the temporary cavity, and its shape is closer to the cylinder with the increase of the speed of the steel sphere. The velocity and shape of projectile play a decisive role in the damage effects." @default.
• W3026095414 created "2020-05-29" @default.
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• W3026095414 date "2020-08-01" @default.
• W3026095414 modified "2023-09-25" @default.
• W3026095414 title "The adaptive finite element material point method for simulation of projectiles penetrating into ballistic gelatin at high velocities" @default.
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• W3026095414 doi "https://doi.org/10.1016/j.enganabound.2020.03.022" @default.
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