Evaluation of the Coefficient of Thermal Expansion of Constituents in Composite Materials using anInverse Analysis Scheme

Lim Jae Hyuk; Sohn Dongwoo

doi:10.7734/COSEIK.2014.27.5.393

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2014 Vol.27, Issue 5 Preview Page Next Page

Evaluation of the Coefficient of Thermal Expansion of Constituents in Composite Materials using anInverse Analysis Scheme 역해석기법을 이용한 복합재료 구성성분의 열팽창계수 예측

2014. pp. 393-401

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Abstract

In this paper, we propose an evaluation scheme of the coefficients of thermal expansion (CTE) of constituents in composite materials using an inverse analysis. The size of constituents typically is about a few micrometers, which makes the identification of material properties difficult as well as the measurement results inaccurate. The proposed inverse analysis scheme, which is combined with the Mori-Tanaka method for predicting an equivalent CTE of composite materials, provides the CTE of the constituents in a straightforward manner by minimizing the cost function defined in lamina scale with the steepest descent method. To demonstrate the effectiveness and accuracy of the proposed scheme, the CTEs of several fibers (glass fiber, P75, P100, and M55J) embedded in matrix are evaluated and compared with experimental results. Furthermore, we discuss the effects of uncertainty of laminar and matrix properties on the prediction of fiber properties.

복합재료 구성성분은 수 마이크로미터 수준의 크기를 가지고 있으므로 시험을 통한 정확한 물성 측정이 매우 어렵다. 그러므로 본 논문에서는 역해석을 이용하여 복합재료 구성성분의 열팽창계수를 예측할 수 있는 기법을 제안한다. 복합재료에 대한 등가 열팽창계수를 예측할 수 있는 Mori-Tanaka 기법과 결합된 역해석기법을 이용하면, 라미나 수준의 목적함수를 최소화함으로써 구성성분의 열팽창계수를 효율적으로 구할 수 있다. 본 연구에서 제안한 기법을 검증하기 위하여 다양한 섬유(glass fiber, P75, P100, M55J)에 대한 열팽창계수를 예측하고 이를 시험결과와 비교하였다. 또한 라미나와 기지 물성치에 대한 불확실성이 섬유 물성치 예측에 미치는 영향을 분석하였다.

Keywords

composite materials, CTE(coefficient of thermal expansion), Mori-Tanaka method, inverse analysis scheme

복합재료, 열팽창계수, Mori-Tanaka 기법, 역해석기법

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 27
No :5
Pages :393-401
Received Date : 2014-05-13
Revised Date : 2014-05-26
Accepted Date : 2014-05-27
DOI :https://doi.org/10.7734/COSEIK.2014.27.5.393

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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