Test and Numerical Simulation of Multilayer Mesh Bumper under Hypervelocity Impact

Paper number

IAC-11,A6,3,17,x10769

Author

Mr. Hong Chen, China Aerodynamics Research and Development Center, China

Coauthor

Ms. Jie Huang, China Aerodynamics Research and Development Center, China

Coauthor

Mr. Zhixuan Zhou, China Aerodynamics Research and Development Center, China

Coauthor

Mr. Leisheng Ren, China Aerodynamics Research and Development Center, China

Coauthor

Dr. Sen Liu, China Aerodynamics Research and Development Center, China

Year

2011

Abstract

To study the performance of the shield configuration based on mesh bumper, hypervelocity impact test and numerical simulation were carried out on 4 types of aluminum mesh bumper. The target was a Whipple configuration. The bumper was a stack of one type meshes fixed by a square frame; the rear wall was a 2.5mm thickness aluminum plate. There were 4 types of aluminum meshes, mesh A(14\begin{math}*\end{math}14), mesh B(18\begin{math}*\end{math}16), mesh C(24\begin{math}*\end{math}24) and mesh D(30\begin{math}*\end{math}30). Respectively, the wire diameters of the 4 types mesh were 0.38mm, 0.25mm, 0.25mm and 0.25mm. The areal densities of the 4 bumper were 0.123g/cm\begin{math}^\end{math}2, 0.115g/cm\begin{math}^\end{math}2, 0.115g/cm\begin{math}^\end{math}2 and 0.120g/cm\begin{math}^\end{math}2. In the test, the projectile was aluminum sphere with diameter of 5mm and velocity ranged from 5.0km/s to 5.1km/s. Test results showed that:

a. The mesh bumper constructed by mesh D had the best performance in disrupting projectile;

b. With the same wire diameter, the closer between the neighbors strings the more effective in disrupting projectile.

Using AUTODYN3D program with SPH processor, the four tests were simulated with same condition. Respectively, the strength models of the projectile and aluminum mesh were Elastic Plastic model and Johnson Cook model. The equations of state of both projectile and aluminum mesh was MieGruneisen EOS. Numerical simulation showed that:

a. The length of largest fragments were 5.4mm, 3.8mm, 3.4mm and 2.6mm when the targets were constructed by mesh A, mesh B, mesh C and mesh D, the mass of the largest were 0.028g, 0.018g, 0.013g and 0.010g;

b. The peak value of the impact load were 32131kg/s/m, 26215kg/s/m, 25557kg/s/m and 22259kg/s/m, when the targets were constructed by mesh A, mesh B, mesh C and mesh D;

c. When the target was constructed by mesh D, the fragments number was the most; when the target was constructed by mesh A the fragments number was the least. 

Both numerical simulation and impact tests shows that the multilayer meshes that constructed by mesh D had the best ability in disrupting projectile and dispersing fragments.

Keywords: Multilayer meshes bumper; Hypervelocity impact; Numerical simulation.

Abstract document

IAC-11,A6,3,17,x10769.brief.pdf

Manuscript document

IAC-11,A6,3,17,x10769.pdf (🔒 authorized access only).

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