... and width varied in order to assess the dependence of constraint on the geometry. It was found that, owing to delaminations occurring perpendicular to short transverse direction and local fracture path deviation from Mode I, a relaxation of the degree of thickness constraint inside the material takes place...

..., when the specimens exhibited extensive delaminations on the fracture surface, the compact specimens had a higher fracture toughness than the short bar specimens. The difference in fracture toughness measured by the two procedures is explained in terms of the alloys' crack growth behavior...

... Matrix cracking and multiple level delaminations around fastener holes in aircraft composite components can be associated with the overtorquing of fasteners. The damage can be repaired using a resin injection procedure. To determine the effectiveness of the procedure, an improved ultrasonic...

... plane strain, finite element model was modified to predict stress states at the laminate interior and free edges. Finite element results demonstrated that the weave geometry reduces edge stresses at low temperatures. Delamination edge stresses in woven laminates are more sensitive to small changes...

... are compared with numerical results available in the literature and with values obtained by an experimental program conducted on angle-ply glass/epoxy laminates. composite materials interlaminar stresses angle-ply delaminations stress analysis composite laminates Paolo Conti^ and Antonio De...

... The effect of delaminations on the stiffness-controlled behavior of laminated composites is investigated. Four panels of [±45,0,90] 2s quasi-isotropic layup are fabricated from the T300/Narmco 5208 material system, three with prescribed delaminations of different rectangular shapes...

... using this technique are presented for pin-loaded holes and impact areas. In the case of the pin-loaded holes the extent of fiber bundle fractures in the internal laminae are shown to be a function of increasing loads. For impact-damaged areas the delaminations between the various laminae were marked...

... and delaminations. Presence of fiber fractures can be inferred from the matrix cracking patterns. stereo X-ray radiography tetrabromoethane composite materials graphite/epoxy composites delaminations matrix cracks fiber fractures nondestructive evaluation G. P. Sendeckyj,1 G. E. Maddux,1 and E...

... by microcracking and delamination) under tension fatigue. Preliminary experimental results are also presented on the response of a full-size [71.1-cm (28-in.)-wide] scarf joint in the skin of a box beam structural component simulating a foil structure. composite materials graphite composites hybrid...

... The results of an experimental study of holographic interferometry and tetrabromoethane (TBE)-enhanced X-ray photography for damage detection in composite materials are presented. The results show that holographic interferometry using thermal loading can accurately track delamination growth...

..., after a given period of service, to establish new bounds for fail-safe applications. The analysis considers delaminations in a cantilevered, laminated beam at arbitrary locations along the length of the beam and through its thickness. For an initial flaw size, the critical load at which the debond tends...