Transverse Ply Cracking in Toughened and Untoughened Graphite/Epoxy and Graphite/Polycyanate Crossply Laminates

Transverse ply cracking of five toughened and untoughened graphite/epoxy and graphite/polycyanate laminates was studied using crossply laminates. Two different theoretical approaches, variational mechanics and resistance curves based on shearlag approximation, were used to analyze the data. Resistan...

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Bibliographic Details
Published in:Journal of composite materials 1991-12, Vol.25 (12), p.1653-1667
Main Authors: Yalvaç, Selim, Yats, Larry D., Wetters, Derrick G.
Format: Article
Language:English
Subjects:
Applied sciences
epoxy resins
Exact sciences and technology
Forms of application and semi-finished materials
fracture toughness
graphite
Laminates
Polymer industry, paints, wood
Technology of polymers
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Summary:Transverse ply cracking of five toughened and untoughened graphite/epoxy and graphite/polycyanate laminates was studied using crossply laminates. Two different theoretical approaches, variational mechanics and resistance curves based on shearlag approximation, were used to analyze the data. Resistance of the laminates to transverse ply cracking was determined. Both theories show the same ranking of the laminates with respect to their resistance to microcracking. These results were compared with the critical strain energy release rate data obtained on the resins and the laminates.
ISSN:0021-9983
1530-793X
DOI:10.1177/002199839102501206