Abstract
The thermomechanical response model of chemically decomposing composites is established. Mass loss due to thermochemical decomposition is modeled by the Arrhenius equation. Phenomenological shrinkage models are proposed and the pore formation due to mass loss is examined from a micro-mechanical point of view. The effect of gas pore pressure caused by decomposition on the deformation of the composite is considered based on the thermal effective stress laws for linearly poroelastic composites. The coupling between the thermochemical decomposition and thermomechanical deformation is made clear throughout the formulation. The results of laboratory tests known as free thermal expansion tests and restrained thermal growth tests are theoretically predicted by the obtained model.
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