Deformation and Failure Modes of Soft Steel Projectiles Impacting Harder Steel Targets at Increasing Velocity |
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Authors: | X W Chen G Chen F J Zhang |
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Institution: | (1) Institute of Structural Mechanics, China Academy of Engineering Physics, P.O. Box 919-414, Mianyang City, Sichuan, 621900, People’s Republic of China |
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Abstract: | The present paper describes an experimental and numerical study concerning the impact of blunt steel projectiles against harder
steel plates, at impact velocities between 200 and 800 m/s. In contrast with previously published observations, three modes
of deformation and failure of the soft steel projectiles were observed in the present study. These included: Taylor cylinder
mushrooming, sunflower-like petalling and plugging perforation. Individual velocity ranges and the transitions between the
deformation/failure modes are identified by both experiments and numerical simulations. Complex material failure mechanisms
of projectile and target play conflicting roles in the various penetration stages. Johnson–Cook models of strength and accumulative
damage failure are employed in 3D numerical simulation to describe material behavior of both projectile and target. Computational
evolutions of each scenario are offered in detail to understand the deformation and failure of projectile and target plate. |
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Keywords: | Taylor impact Mushrooming Sunflower-like petalling Plugging perforation |
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