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http://dx.doi.org/10.7234/composres.2013.26.3.175

The Experimental Study on the Absorbed Energy of Carbon/Epoxy Composite Laminated Panel Subjected to High-velocity Impact  

Cho, Hyun-Jun (충남대학교 항공우주공학과 대학원)
Kim, In-Gul (충남대학교 항공우주공학과)
Lee, Seokje (충남대학교 항공우주공학과 대학원)
Woo, Kyeongsik (충북대학교 토목공학부)
Kim, Jong-Heon (국방과학연구소)
Publication Information
Composites Research / v.26, no.3, 2013 , pp. 175-181 More about this Journal
Abstract
The evaluation and prediction for the absorbed energy, residual velocity, and impact damage are the key things to characterize the impact behavior of composite laminated panel subjected to high-velocity impact. In this paper, the method to predict the residual velocity and the absorbed energy of Carbon/Epoxy laminated panel subjected to high velocity impact are proposed and examined by using quasi-static perforation test and high-velocity impact test. Total absorbed energy of specimen due to the high-velocity impact can be grouped with static energy and kinetic energy. The static energy are consisted of energy due to the failure of the fiber and matrix and static elastic energy, which are related to the quasi-static perforation energy. The kinetic energy are consisted of kinetic energy of moving part of specimen, which are modelled by three modified kinetic model. The high-velocity impact test were conducted by using air gun impact facility and compared with the predicted values. The damage area of specimen were examined by C-scan image. In the high initial impact velocity above the ballistic limit, both the static energy and the kinetic energy are known to be the major contribution of the total absorbed energy.
Keywords
composite laminates; high-velocity impact; penetration energy; quasi-static perforation test; ballistic limit; absorbed energy;
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