A General Study of Hybrid Composite Laminates.

摘要

This thesis is a general study of hybrid composite laminates that includes application of a three dimensional stress analysis approximation technique based on equilibrium considerations and free edge effects. Thermal residual stresses and effects of replacing lamina in a composite laminate with lamina composed of hybrid material were investigated. Two types of 48 ply hybrid composite laminates were tested under tensile and flexure loading. Results achieved experimentally for the moduli of elasticity were compared with values predicted by laminated plate theory and laminated beam theory. Thermal residual stresses proved to be significant and worthy of due consideration in stress analysis of test specimens. Hybridization, as studied, appeared to have little effect on the overall properties of a laminate. Hybrid composite laminates obey classical laminate theory and can, in certain ply configurations, develop considerable free edge effect stresses. (Author)