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Determination of impact events on a plate-like composite structure

Published online by Cambridge University Press:  11 May 2016

L. Xu ,
Y. Wang ,
Y. Cai ,
Z. Wu  and
W. Peng
L. Xu*
Affiliation:
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, China
Y. Wang
Affiliation:
School of Aerospace Engineering, Xiamen University, Xiamen, China
Y. Cai
Affiliation:
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, China
Z. Wu*
Affiliation:
State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, China
W. Peng
Affiliation:
Beijing Aerospace System Engineering Institute, Beijing, China
*
xltfly@mail.dlut.edu.cn
wuzhj@dlut.edu.cn
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Abstract

Composite materials have been increasingly used in aircraft structures. However, these composite structures are susceptible to damage from external low-velocity impacts. In this paper, an impact identification algorithm is proposed to estimate the impact location and force time history simultaneously. A localisation method based on basis vectors is proposed, and the impact force time history is reconstructed by simplified transfer functions. The basis vector stands for the relationship between the impact location and the sensor signals, and the transfer function shows the relationship of the sensor signal and the force time history. An experiment is conducted on a flat glass fibre-epoxy matrix composite plate to verify the developed algorithm using only four sensors. The soft impactor and hard impactor are two typical impactors for impact events; therefore, the impact experiment is performed by the rubber and the steel impactors, respectively. The experimental results indicate that the proposed algorithm is feasible for the identification of impact events on plate-like composite structures.

Keywords

impact locationimpact forcebasis vectorplateaircraft
Type
Research Article
Information
The Aeronautical Journal , Volume 120 , Issue 1228 , June 2016 , pp. 984 - 1004
Copyright
Copyright © Royal Aeronautical Society 2016 

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