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Determination of Degraded Fiber Properties of Laminated CFRP Flat Plates Using the Bivariate Gaussian Distribution Function

이변량 Gaussian 분포함수를 적용한 CFRP 적층 평판의 보강섬유 물성저하 규명

  • Kim, Gyu-Dong (Department of Civil Engineering, Andong National University) ;
  • Lee, Sang-Youl (Department of Civil Engineering, Andong National University)
  • Received : 2016.06.13
  • Accepted : 2016.10.31
  • Published : 2016.10.31

Abstract

This paper presents a method to detect the fiber property variation of laminated CFRP plates using the bivariate Gaussian distribution function. Five unknown parameters are considered to determine the fiber damage distribution, which is a modified form of the bivariate Gaussian distribution function. To solve the inverse problem using the combined computational method, this study uses several natural frequencies and mode shapes in a structure as the measured data. The numerical examples show that the proposed technique is a feasible and practical method which can prove the location of a damaged region as well as inspect the distribution of deteriorated stiffness of CFRP plates for different fiber angles and layup sequences.

Acknowledgement

Supported by : 한국연구재단

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