科研之友
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摘要
In previous works, a model was developed for the transition of an epoxy liquid to a cured solid as a result of the continuous formation of solid epoxy networks by crosslinking. The model accounts for volume decrease during crosslinking, thermal expansion due to heat generation, deformation and stress generation. The networks were assumed to be linear thermo-elastic isotropic solids, material properties were deduced from the literature, and the model was used to determine the stresses generated by curing in a number of examples. The purpose of the present work is to revisit the ideas on which this model is based and incorporate them into a general framework within the context of continuum mechanics. This will show the assumptions that have been made in the existing model because of the lack of experimental results and also provide a proper framework for extending the model as new experimental results are obtained. Each network is now assumed to be a nonlinear thermo-viscoelastic solid with its own properties. The assumption of small deformations is introduced to lead to a simplified model that is linear in the strains.
- 出版日期2016-12
