THERMAL-DAMAGE EFFECTS ON MODE-II INTERLAMINAR FATIGUE-CRACK PROPAGATION OF GRAPHITE-EPOXY COMPOSITES

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/27107

Title:	THERMAL-DAMAGE EFFECTS ON MODE-II INTERLAMINAR FATIGUE-CRACK PROPAGATION OF GRAPHITE-EPOXY COMPOSITES
Authors:	HWANG,JR;LEE,AS
Contributors:	機械工程學系
Keywords:	DELAMINATION
Date:	1994
Issue Date:	2010-06-29 18:07:55 (UTC+8)
Publisher:	中央大學
Abstract:	The relative change in mode II interlaminar crack propagation performance of graphite/epoxy specimens was determined as a function of isothermal over-heating up to 300-degrees-C. Various periods up to 30 min were chosen to simulate a fire-extinguishing procedure. End-notched flexure (ENF) specimens of 24-ply unidirectional graphite/epoxy laminates with a starter film, Teflon, introduced at the mid-thickness of the laminate were prepared. The mode II cyclic delamination growth rate and interlaminar shear strength were determined. The mode II strain energy release rate was calculated from load-displacement results. The interlaminar shear strength change in the response of thermal damage was determined according to ASTM D2344 standard. Fracture surfaces were also examined using a SEM in order to identify the microfailure modes and clarify the mechanisms of degradation.
Relation:	COMPOSITE STRUCTURES
Appears in Collections:	[Graduate Institute of Mechanical Engineering] journal & Dissertation

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