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In situ ply strength: An initial assessmentThe in situ ply strengths in several composites were calculated using laminate fracture data for appropriate low modulus, and high modulus fiber composites were used in conjunction with the least squares method. The laminate fracture data were obtained from tests on Modmor-I graphite/epoxy, AS-graphite/epoxy, boron/epoxy and E-glass/epoxy. The results show that the calculated in situ ply strengths can be considerably different from those measured in unidirectional composites, especially the transverse strengths and those in angleplied laminates with transply cracks.
Document ID
19780013277
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chamis, C. C. (NASA Lewis Research Center Cleveland, OH, United States)
Sullivan, T. L. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1978
Subject Category
Composite Materials
Report/Patent Number
NASA-TM-73771
E-9238
Report Number: NASA-TM-73771
Report Number: E-9238
Meeting Information
Meeting: Conf. on Composite Mater.: Testing and design
Location: New Orleans
Start Date: March 20, 1978
End Date: March 22, 1978
Sponsors: Am. Soc. for Testing and Mater.
Accession Number
78N21220
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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