Study on the blunt impact effects of rifle bullet penetrating the back through human torso targets wear ballistic insert plate

DOI:	10.11809/bqzbgcxb2024.04.015
Keywords:	blunt injuries; ballistic insert plate; numerical simulation; rifle bullet; human torso
Abstract:	In view of the blunt injury of the spine and spinal cord caused by gun bullets penetrating into the human back of body armor, a numerical model of the DBP10 type 5.8 mm rifle bullet penetrating into the NIJ III level SiC/UHMWPE bulletproof insert plate was established, using the JHB constitutive and secondary development based on Abaqus, the VUMAT constitutive model simulates SiC ceramics and UHMWPE laminates respectively; a numerical simulation of a 5.8 mm rifle bullet penetrating into an NIJ Level III SiC/UHMWPE bulletproof insert was carried out, and the accuracy of the numerical model was verified through a comparison of ballistic experimental results based on high speed photography; Based on the numerical simulation results of a bullet penetrating a bulletproof insert, a numerical simulation of a 58 mm rifle bullet penetrating a hard protected human torso target on the back at a target entry speed of 910 m/s was carried out, and the pressure wave after the rifle bullet hit the body armor was clarified. The conduction law within the muscle spinal column restores the stress wave transmission process of typical organs of the human body (heart, liver, lungs, stomach) during the penetration of bullets. The results show that the human back will produce instantaneous high stress on the vertebrae of the spine under the blunt impact of a bullet, which may lead to vertebral fractures, intervertebral disc herniation and spinal instability. The maximum stress of the spinal cord behind the T10 vertebral body was 1.04 MPa, which may lead to changes in the spinal cord. The linear regression analysis of stress and acceleration on the spinal cord showed that there was a positive correlation between pressure and acceleration.
Published:	2024-04-30
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