摘要
This paper presents an analytical study of the thermal residual stresses due to curing incomposites containing twisted fiber bundles. The fibers in a bundle assume the helical form.The 3-dimensional elasticity problem is formulated and solved based upon the principle ofminimum potential energy. The resulting thermal stress field is examined as functions offiber/matrix material properties and fiber bundle geometry. Significant radial stresses onthe fiber and circumferential stresses in the matrix have been identified at the fiber bundle/matrix interface. The analytical result also reveals that twisting of the fiber bundle tendsto reduce the residual stresses due to the fiber matrix differential thermal expansion.
This paper presents an analytical study of the thermal residual stresses due to curing incomposites containing twisted fiber bundles. The fibers in a bundle assume the helical form.The 3-dimensional elasticity problem is formulated and solved based upon the principle ofminimum potential energy. The resulting thermal stress field is examined as functions offiber/matrix material properties and fiber bundle geometry. Significant radial stresses onthe fiber and circumferential stresses in the matrix have been identified at the fiber bundle/matrix interface. The analytical result also reveals that twisting of the fiber bundle tendsto reduce the residual stresses due to the fiber matrix differential thermal expansion.
