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Journal of Composite Materials
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Residual Strength of an ARALL Laminate Containing a Crack

Zhi-He Jin

Center for Advanced Materials Technology Department of Mechanical and Mechatronic Engineering The University of Sydney Sydney, NSW 2006, Australia

Yiu-Wing Mai

Center for Advanced Materials Technology Department of Mechanical and Mechatronic Engineering The University of Sydney Sydney, NSW 2006, Australia

The residual tensile strength of a cracked ARALL (ARamid-fibre-reinforced-polymer/ALuminium Laminates) sandwich with an aramid-fibre/epoxy ply in the middle and two aluminium alloy plies on the outside is studied in this paper. It is assumed that both a Dugdale strip yielding zone in the aluminium layers and a strip damage zone in the fibre composite layer are developed concurrently at the crack tip. Two important parameters have been identified and these are the maximum separation displacement {delta}0 of the fibre composite damage zone and the metal deformation parameter Jc/{sigma}ys where Jc is the critical J-integral and {sigma}ys is the yielding strength of the metal. The requirement that the strength of ARALL is comparable to that of their metal counterpart can be met if {delta}0 is close to Jc/{sigma}ys

Journal of Composite Materials, Vol. 31, No. 8, 746-761 (1997)
DOI: 10.1177/002199839703100801
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