THERMAL SCIENCE

International Scientific Journal

THERMAL STRESS ANALYSIS OF A HYBRIDE STRUCTURE WITH CRACKS IN THE MATRIX (RESIN) COMPOSITE MATERIAL

ABSTRACT
This paper presents numerical stress calculation in the stationary temperature domain for a hybride structure with fiber composite (for example, based on the epoxy risen as matrice of prepreg) and metalic part (other part of structure or metalic mould), as different material according to their own thermical behaviour. The thermal stress analysis is based on the finite element method. A sample problem involving such a composite plate and metalic part of structure or mould at two different temperature levels, corresponding to curing process (co-curing) and operating temperatures respectively, is calculated and discussed. The specifics of composite are emphasized particularly for thermal coefficients (especially shear coefficient is different than zero, there are situations when some of coefficients could be less then zero). This composites as generalized orthotropic material are completelly different than isotropic material (for isotropic material shear coefficient is always equal zero). It was pointed out also that the calculation for the initial crack to appear in the lamellae (the most common occurrence of cracks in the matrix) can be set with a reserve of elasticity or without reserve.
KEYWORDS
PAPER SUBMITTED: 2011-02-23
PAPER REVISED: 2011-05-06
PAPER ACCEPTED: 2011-05-07
DOI REFERENCE: https://doi.org/10.2298/TSCI1102559T
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2011, VOLUME 15, ISSUE 2, PAGES [559 - 563]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence