Test and theoretical method for coefficients of thermal expansion of carbon fiber reinforced composite laminate

doi:10.19936/j.cnki.2096-8000.20210728.005

Abstract

Abstract: With the increase of applications of composites in airplane structures, the thermally-induced stresses become unneglected issues in composite-metal hybrid structures due to the coefficients of thermal expansion (CTE) differences of metal and composites. In order to analyze thermally-induced structural stresses, the CTEs of materials is necessary. Due to the anisotropy of CTEs of composites, which is dependent on the layer and structure of laminates, and the low CTEs along fiber direction, it results in difficulties in evaluation of CTEs for composites. Based on the ASTM E831 and ASTM E289, the CTEs of the T800 carbon fiber reinforced composites with different stack styles were tested through thermomechanical analysis (TMA) and speckle interferometry method, respectively. The CTEs for laminates in different stack sequences were studied, and the theory of in-plane CTEs for composite laminates was proposed. This work provided a fast approach for evaluation of CTEs for carbon fiber reinforced laminated composites for aircraft.

Key words: carbon fiber reinforced composite, laminate, coefficients of thermal expansion, speckle interferometry, thermomechanical analysis

CLC Number:

TB332

QIU Xue-qiong, CHEN Lin. Test and theoretical method for coefficients of thermal expansion of carbon fiber reinforced composite laminate[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(7): 28-32.

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