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Hygrothermal influence on delamination behavior of graphite/epoxy laminatesThe hygrothermal effect on the fracture behavior of graphite-epoxy laminates was investigated to develop a methodology for damage tolerance predictions in advanced composite materials. Several T300/934 laminates were tested using a number of specimen configurations to evaluate the effects of temperature and humidity on delamination fracture toughness under mode 1 and mode 2 loading. It is indicated that moisture has a slightly beneficial influence on fracture toughness or critical strain energy release rate during mode 1 delamination, but has a slightly deleterious effect on mode 2 delamination, and mode 1 transverse cracking. The failed specimens are examined by SEM and topographical differences due to fracture modes are identified. It is concluded that the effect of moisture on fracture topography can not be distinguished.
Document ID
19850067657
Document Type
Reprint (Version printed in journal)
Authors
Garg, A. (NASA Ames Research Center Moffett Field, CA, United States)
Ishai, O. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Engineering Fracture Mechanics
Volume: 22
Issue: 3, 19
ISSN: 0013-7944
Subject Category
COMPOSITE MATERIALS
Distribution Limits
Public
Copyright
Other