Stresses Arising During Cure of the Composite Wound on the Cylindrical Surface of an Element of Exhaust System

The interaction between an anisotropic composite ring and a metal mandrel with reference to the problem of repair of the exhaust system of road cars by means of composite materials is investigated. The axisymmetric problem on determination of the stress-strain state of the composite ring upon its cooling on the cylindrical mandrel is solved. Expressions describing the distribution of stresses and strains across the thickness of the ring and mandrel in the case of elastic statement of the problem are obtained. The cases of emergence of tension between the mandrel and composite ring are analyzed. It is shown that an increase in thickness of the unidirectional anisotropic composite ring can lead to the emergence of tensile stresses as a result of which the ring can separate from the mandrel. A criterion of solidity of the structure ensuring tension of the composite on the mandrel is put forward.