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Analysis of Low Velocity Impact Damage and Compressive Strength After Impact for Laminated Composites  

Suh, Young-W. (한국항공우주연구원 공력구조팀)
Woo, Kyeong-Sik (충북대학교)
Choi, Ik-Hyun (한국항공우주연구원 공력구조팀)
Kim, Keun-Taek (한국항공우주연구원 공력구조팀)
Ahn, Seok-Min (한국항공우주연구원 항공기술실)
Publication Information
Aerospace Engineering and Technology / v.10, no.1, 2011 , pp. 183-192 More about this Journal
Abstract
The demand for weight saving and high performance of aircraft require the more uses of composite materials. However the complicate behaviors and various failure characteristics restrict usage of composite materials. Low-velocity impact damage is a major concern in the design of structures made of composite materials, because impact damage is hidden and cannot be detected by visual inspection. Especially, the reduction on compressive strength after impact is influenced by the ply delaminations introduced as damage by impact event. In this research, the numerical analysis was performed to investigate impact damage and compressive strength after impact. It was found that impact force history and compressive strength after impact calculated by the numerical analysis were compared and shown a good agreement with experimental results.
Keywords
composite materials; Low-velocity impact damage; compressive strength after impact;
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