Abstract
Specimens of a 90° cross-ply glass-reinforced polyester were tested in tension in a direction parallel to one of the directions of reinforcement. Extensive cracking of the transverse ply occurred at strains much lower than the resin failure strain. These cracks formed in a direction parallel to the transverse reinforcement and showed a remarkably even crack spacing. Results of crack spacing measurements are presented against applied stress for specimens with differing transverse-ply thicknesses. The transverse-crack spacing was found to decrease with increasing applied stress and to increase with increasing transverseply thickness. There was no evidence of debonding between the plies during cracking and a multiple cracking theory in which the plies remain elastically bonded has been presented which can account for the results.
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Garrett, K.W., Bailey, J.E. Multiple transverse fracture in 90° cross-ply laminates of a glass fibre-reinforced polyester. J Mater Sci 12, 157–168 (1977). https://doi.org/10.1007/BF00738481
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DOI: https://doi.org/10.1007/BF00738481