Shear-induced interfacial sheath structure in isotactic polypropylene/glass fiber composites

Matrix cracking of fiber-reinforced ceramic composites in shear

The mechanics of cracking in fiber-reinforced ceramic matrix composites (CMCs) under general loadings remains incomplete. The present paper addresses one outstanding aspect of this problem: the development of matrix cracks in unidirectional plies under shear loading. To this end, we develop a model based on potential energy differences upstream and downstream of a fully bridged steady-state mat...

Influence of Fiber Surface Structure on Interfacial Structure between Fiber and Matrix in Vapor Grown Carbon Fiber Reinforced Aluminum Matrix Composites

Vapor grown carbon fiber reinforced pure aluminum matrix composites were fabricated by the hot-pressing method below the melting temperature of pure aluminum. The surface structures of the vapor grown carbon fibers and the interfacial structures between the fibers and the matrix in the composite were observed. The precipitation mechanism of crystalline aluminum carbide was also investigated. An...

Interfacial effects in composites

It is well known that the behavior of diverse multicomponent systems such as fibrous composites, particle—filled polymers, polymer blends, and pigmented coatings depends not only on the composition, morphology, and properties of the constituents, but also on the nature of the interfacial region. This paper reviews typical examples, with emphasis on interpretation of interactions between constit...

Strong Influence of a Small Fiber on Shear Stress in Fiber-Reinforced Composites

In stiff fiber-reinforced material, the high shear stress concentration occurs in the narrow region between fibers. With the addition of a small geometric change in crosssection, such as a thin fiber or a overhanging part of fiber, the concentration is significantly increased. This paper presents mathematical analysis to explain the rapidly increased growth of the stress by a small particle in ...

Relaxation of Shear-Induced Precursors in Isotactic Polypropylene and Random Propylene-Ethylene copolymers