Stress/strain submodel

Stress/strain submodel Stresses within the composite that occur during winding, as a result of heating/cooling, or upon mandrel removal are evaluated in the stress/strain submodel. 

Stress-Strain Submodel Winding and Thermal Loads... 

The fiber motion submodel yields the fiber position during processing. In filament winding, the fiber position is affected by flow of the resin matrix material, expansion of the mandrel, and expansion of the composite. In the fiber motion submodel, only changes in fiber position caused by flow of the matrix are considered. Changes caused by thermal expansion of the mandrel and composite are included in the stress-strain submodel. 

The stress submodel results in the stresses and strains in the composite. Stresses and strains are introduced by fiber tension, thermal expansion or contraction, and chemical changes. The effects of fiber tension, temperature and chemical changes may arise simultaneously however, the stresses and strains are analyzed separately. The sum of the stresses and strains caused by each of these factors is the actual stress and strain in the composite. 

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