Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 41, Issue 1, Pages 108-115Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2009.09.025
Keywords
Thermosetting resin; Residual/internal stress; Thermal analysis; Thermomechanical
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A thermal, theological and mechanical material characterization of an aeronautic epoxy resin from commercial prepreg is reported in this article. The kinetic of the crosslinking reaction of the resin is characterized and modeled. The specific heat, the glass transition temperature, the thermal expansion the chemical shrinkage coefficients and the thermo-mechanical properties have been inves-coefficients, tigated as a function of temperature and degree of cure. Dynamic mechanical measurements are used to determine the gel point. Finally, the residual stresses developed during the curing process are calculated using a finite element simulation, taking into account the material properties evolutions according to proposed models. The results highlight the importance of the characterization accuracy and the associated models. (C) 2009 Elsevier Ltd. All rights reserved.
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