Fracture properties of PMR-15/graphite-fiber composites

Alamgir Farouk; Noshir Langrana

doi:10.1016/0266-3538(92)90088-K

Fracture properties of PMR-15/graphite-fiber composites

Alamgir Farouk, Noshir Langrana

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

The fracture properties of PMR-15/graphite-fiber-fabric composites have been investigated in this study. Processing parameters such as pressure application time and pressure magnitude have been varied systematically to simulate processing defects. Upon testing these composite specimens, insight is gained into the processing/property relations. The fracture specimens are of the single-edge-notched simple beam type, loaded in Mode I or opening mode, with the notch transverse to the plane of the laminate, resulting in translaminar crack propagation. Crack growth initiation is detected by monitoring acoustic emission, which may be qualitatively related to crack extension. The study leads to a better understanding of (a) the failure process or nature of failure of these composites, (b) the correlation between fracture properties and structural variables (void content, etc.) and (c) the correlation between fracture properties and process variables.

Original language	English (US)
Pages (from-to)	265-277
Number of pages	13
Journal	Composites Science and Technology
Volume	45
Issue number	3
DOIs	https://doi.org/10.1016/0266-3538(92)90088-K
State	Published - Jan 1 1992

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Engineering(all)

Keywords

J-integral
PMR-15
acoustic emission
fiber pull-out
fracture-failure
translaminar crack

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10.1016/0266-3538(92)90088-K

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title = "Fracture properties of PMR-15/graphite-fiber composites",

abstract = "The fracture properties of PMR-15/graphite-fiber-fabric composites have been investigated in this study. Processing parameters such as pressure application time and pressure magnitude have been varied systematically to simulate processing defects. Upon testing these composite specimens, insight is gained into the processing/property relations. The fracture specimens are of the single-edge-notched simple beam type, loaded in Mode I or opening mode, with the notch transverse to the plane of the laminate, resulting in translaminar crack propagation. Crack growth initiation is detected by monitoring acoustic emission, which may be qualitatively related to crack extension. The study leads to a better understanding of (a) the failure process or nature of failure of these composites, (b) the correlation between fracture properties and structural variables (void content, etc.) and (c) the correlation between fracture properties and process variables.",

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author = "Alamgir Farouk and Noshir Langrana",

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AU - Langrana, Noshir

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N2 - The fracture properties of PMR-15/graphite-fiber-fabric composites have been investigated in this study. Processing parameters such as pressure application time and pressure magnitude have been varied systematically to simulate processing defects. Upon testing these composite specimens, insight is gained into the processing/property relations. The fracture specimens are of the single-edge-notched simple beam type, loaded in Mode I or opening mode, with the notch transverse to the plane of the laminate, resulting in translaminar crack propagation. Crack growth initiation is detected by monitoring acoustic emission, which may be qualitatively related to crack extension. The study leads to a better understanding of (a) the failure process or nature of failure of these composites, (b) the correlation between fracture properties and structural variables (void content, etc.) and (c) the correlation between fracture properties and process variables.

AB - The fracture properties of PMR-15/graphite-fiber-fabric composites have been investigated in this study. Processing parameters such as pressure application time and pressure magnitude have been varied systematically to simulate processing defects. Upon testing these composite specimens, insight is gained into the processing/property relations. The fracture specimens are of the single-edge-notched simple beam type, loaded in Mode I or opening mode, with the notch transverse to the plane of the laminate, resulting in translaminar crack propagation. Crack growth initiation is detected by monitoring acoustic emission, which may be qualitatively related to crack extension. The study leads to a better understanding of (a) the failure process or nature of failure of these composites, (b) the correlation between fracture properties and structural variables (void content, etc.) and (c) the correlation between fracture properties and process variables.

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