Fragmentation of two-fiber hybrid microcomposites: stress concentration factors and interfacial adhesion

Tipo de material: Texto

TextoSeries ; Composites Science and Technology, 60(3), p.367-377, 2000Trabajos contenidos:

Zhou, X.-F
Wagner, H.D

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Resumen: Stress concentration profiles resulting from the progressive fragmentation of a single fiber, and fiber/polymer interfacial adhesion, were assessed by testing a two-fiber hybrid microcomposite. The specimen consisted of a highly pre-stressed E-glass fiber and a lightly stressed Kevlar fiber, embedded in an epoxy film. The large pre-stress ensured saturation of the fragmentation process in the glass fiber. The interfacial adhesion was quantified by an energy balance approach as well as by a conventional stress balance (Kelly±Tyson)scheme. The stress concentration profiles induced in the Kevlar fiber by breaks in the nearby E-glass fiber were measured by micro-Raman spectroscopy, using several interfiber distances. The experimental results were compared with an extension of our earlier theoretical scheme for the stress concentration factor profile. # 2000 Elsevier Science Ltd. All rights reserved.

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Stress concentration profiles resulting from the progressive fragmentation of a single fiber, and fiber/polymer interfacial adhesion, were assessed by testing a two-fiber hybrid microcomposite. The specimen consisted of a highly pre-stressed E-glass fiber and a lightly stressed Kevlar fiber, embedded in an epoxy film. The large pre-stress ensured saturation of the fragmentation process in the glass fiber. The interfacial adhesion was quantified by an energy balance approach as well as by a conventional stress balance (Kelly±Tyson)scheme. The stress concentration profiles induced in the Kevlar fiber by breaks in the nearby E-glass fiber were measured by micro-Raman spectroscopy, using several interfiber distances. The experimental results were compared with an extension of our earlier theoretical scheme for the stress concentration factor profile. # 2000 Elsevier Science Ltd. All rights reserved.

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