Ultrasonic ply-by-ply detection of matrix cracks in laminated composites

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dc.contributor.advisor Kinra , Vikram K . en_US
dc.contributor.committeeMember Ochoa , Ozden O . en_US
dc.creator Ganpatye , Atul Shridatta en_US
dc.date.accessioned 2005 -02 -17T20 :59 :00Z
dc.date.accessioned 2014 -02 -19T18 :35 :13Z
dc.date.available 2005 -02 -17T20 :59 :00Z
dc.date.available 2014 -02 -19T18 :35 :13Z
dc.date.created 2004 -12 en_US
dc.date.issued 2005 -02 -17T20 :59 :00Z
dc.identifier.uri http : / /hdl .handle .net /1969 .1 /1327
dc.description.abstract In the design of cryogenic fuel tanks for the next generation Reusable Launch Vehicles (RLVs ) , the permeability of liquid hydrogen (LH2 ) across the thickness of the tank is a critical issue . The rate of permeation of LH2 is largely dependent on the internal damage state of the composite tank wall . Damage in the form of matrix cracks in the composite material of the tank is responsible for the through -the -thickness permeation of LH2 . In this context , the detection of matrix cracks takes on an unprecedented significance . In this work , an ultrasonic technique for the ply -by -ply detection of matrix cracks in laminated composites is developed . Experimental results are presented for graphite /epoxy laminates with different lay -ups and laminate thicknesses . Matrix cracks in each of the plies of the laminated composites were detected even when there was a rather high density of cracks in all of the plies . The ultrasonic data were calibrated by comparing them with the corresponding results obtained by using the traditional methods of optical microscopy and penetrant enhanced X -radiography . Excellent quantitative correlation was observed between the results obtained with ultrasonics and the traditional methods . en_US
dc.format.extent 21370351 bytes
dc.format.medium electronic en_US
dc.format.mimetype application /pdf
dc.language.iso en _US en_US
dc.publisher Texas A &M University en_US
dc.subject Ultrasonics en_US
dc.title Ultrasonic ply -by -ply detection of matrix cracks in laminated composites en_US
dc.type Book en
dc.type.genre Electronic Thesis en_US
dc.type.material text en_US
dc.format.digitalOrigin born digital en_US

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Ultrasonic ply-by-ply detection of matrix cracks in laminated composites. Available electronically from http : / /hdl .handle .net /1969 .1 /1327 .

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