Abstract
Stable and/or unstable crack initiation and propagation to total failure is numerically simulated, for a series of double-edge-notched unidirectional (UD) composite laminate tension specimens of T300/914C carbon-epoxy (CE) material, with different ply orientations: [0] 16, [45] 16 and [90] 16. Several candidate fracture criteria are calibrated first on the [0] 16 configuration to reproduce the experimental crack initiation load and rate of stable crack growth. These criteria are next applied to the other configurations: [0] 16 for initially stable crack growth and [45] 16 and [90] 16 for immediately unstable crack growth. The fracture criteria are compared, and an improved calibration is proposed, applicable to all orientations.
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