The experimental and numerical investigation of pistol bullet penetrating soft tissue simulant.
Gelatin, a representative simulant for soft tissue of the human body, was used to study the effects of 9 mm pistol bullet's penetration. The behavior of a bullet penetrating gelatin was quantified by the temporary cavity sizes in ballistic gelatin and the pressure values of bullet's impact. A numerical simulation model of a bullet penetrating the soft tissue simulant gelatin was built using the finite element method (FEM). The model was validated by the comparison between the numerical results and the experimental results. During a bullet penetrating ballistic gelatin, four stages were clearly observed in both the experiment and the numerical simulation: a smooth attenuation stage, a rolling stage, a full penetration stage, and a stage of expansion and contraction. The cavity evolution, equivalent stress field and the strain field in gelatin were analyzed by numerical simulation. Moreover, the effects of the bullet's impact velocities and angles of incidence on the temporary cavity in gelatin, its velocity attenuation, and its rolling angle were investigated, as well as the bullet's resistance and energy variation. The physical process and the interactive mechanism during a pistol bullet penetrating gelatin were comprehensively revealed. This may be significant for research in wound ballistics.
School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, PR China. Electronic address: wangyongjuan94@gmail.com.
Yongjuan
Y
Wang
School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, PR China. Electronic address: plastbulate@163.com.
Xiaoning
X
Shi
School of Science, Nanjing University of Science & Technology, Nanjing 210094, PR China. Electronic address: chenaijun@njust.edu.cn.
Aijun
A
Chen
School of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing 210094, PR China. Electronic address: Xucheng62@njust.edu.cn.
Cheng
C
Xu
D004735:Energy Transfer; D020342:Finite Element Analysis; D044709:Forensic Ballistics; D005780:Gelatin; D006801:Humans; D008954:Models, Biological; D015233:Models, Statistical; D014948:Wounds, Gunshot
D005780:Gelatin
Cavity evolution; Energy transfer; Penetration; Tissue simulant; Wound ballistics