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An experimental investigation of the fracture behavior of tension specimens containing part-through semi-elliptic surface flaws was conducted utilizing T300/5208 graphite/epoxy laminates with a [0/±45/90]10s stacking sequence. The notched strength of the specimens was found to be influenced by the flaw aspect ratio as well as flaw depth. Using a value of fracture toughness previously obtained for this material system, linear elastic isotropic fracture mechanics predicted the influence of the flaw shape and size on the notched strength.
fracture of composites, thick laminates, part-through surface flaws, graphite/epoxy laminate
Assistant professor, Texas A&M University, College Station, TX
Professor, Virginia Polytechnic Institute and State University, Blacksburg, VA