Stress analysis in unidirectional composite plates under torque loading : Experimental observation
Journal of Reinforced Plastics and Composites
Analysis of the stress state in a composite plate under torque loadings and some practical information are necessary for the engineering design. The large rotation displacement has been taken into account for the stress analysis and the experimental results have shown a good agreement with the analytical results. It is found that the normal stress due to the fiber deformation is no longer negligible if the rotation angle becomes important and we notice also that there exists a compression zone in the middle of the plate and two tension zones in each side, the ratio of the compression zone width to the total width is about 0.58. The maximum tension stress in the plate is double its compression stress. The experimental observations have shown that the shear stresses 712max and jT13m seem responsible for the material degradation under torque loadings, and the determination of these shear stresses has to use the effective torque (MAff) instead of the applied torque (M.).