On the needs of enhancement of energy absorption at various oblique angle under high speed impact

This study proposed to enhanced the capability of energy absorption on fixed target plate at different oblique angle under high speed impact. The bullet impact on the fixed target plate quite severe at the normal and oblique angle of impact. Thus, the presence of extra mechanism such damper was vital to deal with this severe impact. The high speed impact on 6.0 mm thick high strength steel with polyurethane as damper were simulated using specific dynamic software under Johnson-Cook model and Mooney-Rivlin model for bullet of 7.62 x 63 mm APM2 and damper. The different angle, which are range between 0' up to 60' obliquity from Y-axis and the impact velocity was 830m/s in all test. Result showed that the energy absorbed by the the plate was proportional with the increment of angle from 0' to 45' which is 871.66J, 965.07J and 1704.5J when using the damper. At 45', the energy absorb was the highest and at 60' the energy absorbs decrease to 1217.7J. In conclusion, this study provides an initial idea on how to reduce the bullet impact and determination of better angle for high energy absorption during the impact.