Fractography and Fracture Criteria of the Delamination Process

Johannesson T; Blikstad M

doi:10.1520/STP36317S

SYMPOSIA PAPER Published: 01 January 1985

STP36317S

Fractography and Fracture Criteria of the Delamination Process

Source

Angle-ply laminates of T300/1034 graphite/epoxy were loaded in tension. Prior to ultimate failure the interlaminar out-of-plane stresses cause edge delamination. The onset of delamination is determined by the strain energy release rate in the interlaminar region. Values of the critical strain energy release rate (G_c) for edge delamination calculated from the strain at delamination onset were fitted to a geometrical fracture criterion. It is seen that G_c increases with the K_III/K_I ratio in the interlaminar region. The delamination fracture surfaces exhibit hackle formation, and the tilt of the hackles is characteristic of the interlaminar state of stress.

Author Information

T, Johannesson

Linköping Institute of Technology, Linköping, Sweden

M, Blikstad

Linköping Institute of Technology, Linköping, Sweden

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Details

Developed by Committee: E08

Pages: 411–423

DOI: 10.1520/STP36317S

ISBN-EB: 978-0-8031-4941-0

ISBN-13: 978-0-8031-0414-3

Fractography and Fracture Criteria of the Delamination Process

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