Modeling the Curing Kinetics of an Epoxy Binder with Disturbed Stoichiometry for a Composite Material of Aerospace Purpose
Results of an experimental study and numerical simulation of the curing kinetics of an epoxy binder under the conditions of violation of the stoichiometric equilibrium of its components are presented. The object of research is a two-component composition of an L epoxy resin and an EPH 161 hardener,...
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Published in | Mechanics of composite materials Vol. 57; no. 3; pp. 361 - 372 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.07.2021
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Results of an experimental study and numerical simulation of the curing kinetics of an epoxy binder under the conditions of violation of the stoichiometric equilibrium of its components are presented. The object of research is a two-component composition of an L epoxy resin and an EPH 161 hardener, certified as a binder for composite materials of aerospace purpose. As the basic model, we used a system of two ordinary differential equations describing the behavior of the resin and hardener during the curing process. The values of material parameters necessary for calculations were obtained by a rheological method, where the viscosity of binder was analyzed as a function of polymerization time and hardener concentration. The estimates of model parameters obtained by processing data of full-scale experiments are presented. The effective values of kinetic parameters at which the calculated time of yield loss is in good agreement with the experimental one are determined. The adequacy of the model was confirmed by direct measurements using the IR spectroscopy. |
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ISSN: | 0191-5665 1573-8922 |
DOI: | 10.1007/s11029-021-09960-3 |