Journal ArticleDOI
Interlaminar Fracture Behavior and Fiber Bridging of Glass-Epoxy Composite Under Mode I Static and Cyclic Loadings:
Woonbong Hwang,K.S. Han +1 more
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In this paper, the interlaminar fracture behavior of composite materials under static and cyclic loadings has been studied using a width tapered double cantilever beam specimen and the fracture energy is evaluated by compliance, beam and area methods.Abstract:
Interlaminar fracture behavior of composite materials under static and cyclic loadings has been studied using a width tapered double cantilever beam specimen. The fracture energy is evaluated by compliance, beam and area methods. The comparison results show that the initial fracture energy could be evaluated either by beam or area method while the crack growth resistance could be calculated by compliance method. Increases in the criti cal load and fracture energy due to fiber bridging are predicted by a power function of fracture area. The interlaminar fatigue crack growth behavior is studied through the con stant cyclic strain energy release rate range test. A modification of Paris' power law is made to interpret fatigue crack growth under the influence of fiber bridging. The predicted fatigue life by the modified power law is reasonably close to the experimental data. Frac tography study shows that the interlaminar failure mechanism of a composite beam in volves fiber breakage, matrix tearing and transv...read more
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Journal ArticleDOI
Self-healing structural composite materials
TL;DR: In this paper, a self-healing fiber-reinforced structural polymer matrix composite material is demonstrated, where a microencapsulated healing agent and a solid chemical catalyst are dispersed within the polymer matrix phase.
Journal ArticleDOI
The path towards delamination-free drilling of composite materials
Hong Hocheng,C.C. Tsao +1 more
TL;DR: In this paper, the path towards delamination-free drilling of composite materials is reviewed and the major scenes are illustrated including the aspects of the analytical approach, the practical use of special drill bits, pilot hole and back-up plate, and the employment of non-traditional machining method.
Journal ArticleDOI
Self-activated healing of delamination damage in woven composites
TL;DR: In this article, a study of the healing of delamination damage in woven E-glass/epoxy composites is performed, with the ultimate goal of self-healing in mind, two types of healing processes are studied.
Journal ArticleDOI
Mode II interfacial toughening through discontinuous interleaves for damage suppression and control
TL;DR: In this paper, an investigation concerning the interaction of propagating interlaminar cracks with embedded strips of interleaved materials in E-glass fiber reinforced epoxy composites is described.
References
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Journal ArticleDOI
The fracture of epoxy- and elastomer-modified epoxy polymers in bulk and as adhesives
TL;DR: In this article, the effect of adding carboxy-terminated butadiene-acrylonitrile (CTBN) elastomer to a piperidine/bisphenol A diglycidyl ether (A) resin was investigated.
Book ChapterDOI
Moisture and Temperature Effects on the Mixed-Mode Delamination Fracture of Unidirectional Graphite/Epoxy
AJ Russell,KN Street +1 more
Journal ArticleDOI
A Double Cantilever Beam Test for Characterizing Mode I Delamination of Composite Materials
TL;DR: In this article, the double cantilever beam test is examined as a candidate for measuring in terlaminar fracture resistance as related to normal stress induced delamina tion, and a number of approaches to data reduction schemes used in conjunction with this test method for determining critical strain energy release rate are discussed.
Book ChapterDOI
Characterizing delamination growth in graphite-epoxy
TL;DR: In this paper, coupon specimens have been developed to measure the fundamental static fracture and subcritical growth behavior of delaminations of graphite-epoxy composites, and two basic designs, one for the tensile opening mode (Mode I) and one for forward shear mode (mode II), are described.
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