Fracture modes of high modulus graphite/epoxy angleplied laminates subjected to off-axis tensile loadsAngleplied laminates of high modulus graphite fiber/epoxy were examined in several ply configurations at various tensile loading angles to the zero ply direction to determine the effects of ply orientations on tensile properties, fracture modes, and fracture surface characteristics of the various plies. Experimental results consist of stress-strain data, selected plots, fracture stresses and strains, and scanning electron microscope (SEM) photographs of fracture surfaces. It was found that the stress-strain curves were linear to fracture, and that although fracture surface characteristics for a given fracture mode are similar to those for the same fracture mode in uniaxial specimens, no simple load angle range can be associated with a given fracture mode. It was also concluded that SEM results must be supplemented with ply stress calculations in order to identify ranges of fracture modes occurring as a function of ply orientation with respect to the load direction.
Document ID
19800047899
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Sinclair, J. H. (NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Subject Category
Composite Materials
Meeting Information
Meeting: Rising to the challenge of the ''80s; Annual Conference and Exhibit