Abstract
In order to analyze the impact acceleration of the projectile impacting the aluminum foam material, a dynamic non-linear finite element model of the projectile impacting the closed-cell aluminum foam experiment device was established and verified by the experiment. It is found that the numerical simulation results of projectile impact closed-cell aluminum foam are consistent with the change of experimental results. When the projectile impacts the homogeneous closed-cell aluminum foam, the impact acceleration is trapezoidal and the impact peak and pulse width are related to the density of the aluminum foam material. With the increase of the porosity of the aluminum foam, the peak value of the acceleration rises and the pulse width of acceleration decreases.
Highlights
In recent years, with the rapid development of aviation, aerospace, and weapons industries, there are some higher requirements on new materials and certain key components
By a combination of numerical simulations and experiments, the impact acceleration of high-velocity projectiles impacting homogeneous porosity aluminum foams with different porosity are studied
The simulation results show that the peak value of the acceleration rises, the pulse width of acceleration decreases, and the absorption energy per unit volume of aluminum foam increases with the increase of porosity of aluminum foam
Summary
With the rapid development of aviation, aerospace, and weapons industries, there are some higher requirements on new materials and certain key components. There is an increasing need for impact experiment Such experiments require that equipment be capable of providing a strong shock, wide pulse impact environment. Domestic research on the design of impact experiment mainly focuses on experimental simulation under low-velocity impact environment. There are few experimental studies on strong impact and wide pulse impact environment. The wide-pulse and strong-impact parameter calibration technology of foreign gunfire missile-borne flight recorder experiment equipment is relatively advanced. SIMULATION AND EXPERIMENTAL INVESTIGATION OF HIGH-SPEED PROJECTILE IMPACTING CLOSED-CELL ALUMINUM FOAM. By a combination of numerical simulations and experiments, the impact acceleration of high-velocity projectiles impacting homogeneous porosity aluminum foams with different porosity are studied. The formation of the acceleration of the projectile provides a reference for further study of the high-peak and wide pulse acceleration
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