The Virtual Test of Impact Damage on Weapon SystemBased on SPH Numerical Simulation Method

doi:10.12382/bgxb.2024.0959

Abstract

Abstract:

The problem of impact damage widely exists in various types of weapons and equipment,and seriously affects their use and lifespan.Currently,there is no universally applicable basic model for virtual experimental research on impact damage.This article focuses on the construction of basic model for impact damage virtual testing,and discusses the basic principles of smooth fluid dynamics and the application of its numerical simulation method in impact damage virtual testing.An improved smoothed particle hydrodynamics(SPH)numerical calculation model is constructed,and the particle processing and material boundary treatment of physical models are discussed in detail.Simulation calculations are conducted on the impact of typical rigid particles on the impact copper target plates,verifying the reliability and accuracy of the simulation.The damage situations of target plates impacted by the rigid particles with different edges and angles are compared and analyzed,fully demonstrating the applicability of the SPH method in virtual impact damage testing.

Key words: impact damage, smoothed particle hydrodynamics, boundary treatment method, virtual experiment, numerical simulation

LI Pengfei, XIA Hongli, HOU Chuanyu, ZHOU Yuqi, MIAO Haibin. The Virtual Test of Impact Damage on Weapon SystemBased on SPH Numerical Simulation Method[J]. Acta Armamentarii, 2024, 45(S2): 208-214.

Figures/Tables 13

Fig.1 Calculated results of FEM method when α=20°

Fig.2 Calculated results of SPH method when α=20°

Table1 Material parameters of copper target plate

参数		数值
密度ρ₀/(kg·m^-3)		8960
剪切模量G/GPa		46
泊松比v		0.34
比热容C_p/( J·kg^-1·K^-1)		383
塑性模型参数/MPa	A_jc	90
	B_jc	292
	N_jc	0.31
	C_jc	0.025

Fig.3 Schematic diagram and key parameters of particle impact test

Fig.4 Imaging results of particle impact process recorded by experimental equipment

Fig.5 Simulated results of particle impact process calculated by SPH method

Fig.6 Depth curve and key parameters of pit surface

Fig.7 Measured result of pit surface depth curve

Fig.8 FEM result of pit surface depth curve test

Fig.9 SPH result of pit surface depth curve test

Table 2 Comparison of key parameters of pit surface depth curve results

主要参数	实验测量	FEM计算结果	SPH计算结果
d_max/mm	0.97	1.09	1.05
h_lip/mm	0.57	0.55	0.41

Fig.10 Impact process of rigid particles in contact with the target plate at an angle of 60 °

Fig.11 Impact process of rigid particles in contact with the target plate at an angle of 120 °

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