The Influence of Honeycomb Sandwich Structure on Hypervelocity Impact Damage

Paper number

IAC-11,A6,3,19,x10778

Author

Mr. Zhaoxia Ma, China Aerodynamics Research and Development Center, China

Coauthor

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

Coauthor

Mr. Fawei Ke, China Aerodynamics Research and Development Center, China

Coauthor

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

Coauthor

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

Year

2011

Abstract

Debris cloud generated by projectile impacting front panel of honeycomb sandwich is the main reason causing damage in honeycomb sandwich under hypervelocity impact. To research the influences of impact position, the honeycomb core side length, height, and arrangement of honeycomb core on the damage of honeycomb sandwich, a numerical model is built, which is validated by normal impact and oblique impact with impact velocity of 5km/s. Validate tests agrees well with numerical simulation results in the damage form and size of honeycomb core and honeycomb panel, which means the numerical model is feasible.

	Using this model, the influences of above factors on the distribution of debris and the damage of whole structure are studied. The research results show that: 

	1) The influence of impact position is relatively small on honeycomb sandwich damage, in 3km/s-7km/s, the difference of impact position leads the difference of critical projectile diameter, which can be 0.4mm at most.

	2) The honeycomb core side has some influence on the damage level. The longer the honeycomb core side, the bigger the bump area of the rear panel, but the lighter the damage in rear panel. 

	3) The honeycomb core height has some influence on the damage level, too. The duration of debris moving in honeycomb core becomes longer with increase of core height and the debris cloud is obstructed more strongly, so the bump area of rear panel becomes larger with the damage reduced.

	4) The arrangement of honeycomb core has a great influence on the damage level. For double-layer honeycomb sandwich, the debris cloud is blocked by the medial panel, some debris is spattered in reverse, thus the rear panel damage is more lighter; Compared with single-layer honeycomb sandwich the rear panel damage of double-layer honeycomb sandwich is reduced but the effect is not evident compared with normal impact.

	Key words: Honeycomb sandwich, Hypervelocity impact, Structure

Abstract document

IAC-11,A6,3,19,x10778.brief.pdf

Manuscript document

IAC-11,A6,3,19,x10778.pdf (🔒 authorized access only).

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