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Composite Interfaces, Vol.22, No.4, 233-248, 2015
Experimental study of CFRP patches bonded on a cracked aluminum alloy panel
An experimental study was conducted to arrest a crack in 1.0-mm-thick 6061-T6 aluminum single-edge-notch tension specimen. The specimen was repaired by symmetrical bonding of carbon fiber-reinforced polymer patches made of several plies. Although J-integral was reduced drastically, the specimen failed at one of the leading edges through separation at the interface. The separation was suppressed by tapering all the four leading edges of the patches. The specimens did not fail in the patched area when loaded up to the far field stress of 272MPa, which was higher than the yield stress, 265MPa of the aluminum plate.