Effect of Mold Fixture on Stress and Deformation of Composite Structure

摘要

During the process of autoclave formation of thermosetting composite structures, the temperature distribution is strongly influenced by the forming fixture, which then contributes to forming error of the composite structure. On the base of 3D thermomechanical model by the software ABAQUS, effects of mold fixture on temperature, stress and deformation are investigated. Numerical simulation results of the composite structure show that the deformation in the two sides and stress in the middle are both maximum. Compared with the composite structure, column mold fixture instead of oblique support mold fixture and vertical plate mold fixture owns the proximate temperature distribution and deformation during the process of autoclave formation. Therefore, from the viewpoint of controlling the deformation of the composite structure, the column mold fixture is better than the oblique support or vertical plate mold fixtures.