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Delamination, a frequently observed failure mode in composite laminate, is a key issue in structural design and integrity consideration. In this paper, the stability of delamination crack is investigated for angle-ply laminates subjected to uniform displacement and ther mal loading. Due to the...
The results of biaxial tension tests on AS4/3501-6 carbon/epoxy are presented for a quasi-isotropic (90, ±45,0) s laminate. These tests were performed using a tubular spec imen subjected to internal pressure and axial tension. The specimen design appears to minimize stress concentrations in the...
The interlaminar fatigue crack growth behavior in a random short-fiber SMC-R50 com posite is studied. Experiments were conducted on double-cantilever-beam (DCB) composite specimens under displacement-controlled cyclic loading. Owing to large defor mation experienced in the specimen, a...
This paper describes a methodology for predicting the elastic properties of three- dimensional textile structural composites. A "Fiber Inclination Model" is established, which treats the unit cell of a composite as an assemblage of inclined unidirectional laminae. The analysis is based upon the...
The task of designing symmetric laminated beams with optimal stiffness and damping is considered by incorporating the damping model of Adams, et al. into an optimization algorithm. The design variables are the fiber orientation in each ply, the stacking se quence, and also the thickness of each...
The effect of orientation of amino group (i.e. m-DDS and p-DDS) and concentration of diamine (10 phr-50 phr) on the curing of diglycidyl ether of bisphenol-A (DGEBA) was investigated. Heat of polymerization (ΔH) increased with increasing phr of diamines up to optimum phr (37.19). Further...
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