Load rate effects on the crush response of laminated corrugated beams
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This experimental study addresses the progressive crushing responses of laminated corrugated beams fabricated using Newport NB321/7781 E-glass prepreg material. Stacking sequences of [0]n and [45]n where n=4,8 and 12 have been used. The progressive crushing behavior has been studied at quasi-static rates and at selected dynamic loading rates. The test data indicates that the peak load levels increase with load rate, while the sustained crushing load decreases. [0]n surpass [45]n in terms of energy absorbing capability at various loading rates by at least 30%. The failure modes in [0]n beams was observed to be rate sensitive with the number of fronds and frond fragmentation changing with test speed.
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Research completed at the Dept. of Aerospace Engineering, College of Engineering
Research completed at the Department of Aerospace Engineering, College of Engineering
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v.6