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01661 am a22001573u 4500 |
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364958 |
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|a Bull, D.J.
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|a Spearing, S.M.
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|a Sinclair, I.
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|a Observations of damage development from compression-after-impact experiments using ex situ micro-focus computed tomography
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|c 2014-06-16.
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|z Get fulltext
|u https://eprints.soton.ac.uk/364958/1/Observations%2520of%2520damage%2520development%2520from%2520compression-after-impact%2520experiments%2520using%2520ex%2520situ%2520micro-focus%2520computed%2520tomography.txt
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|a The development of damage mechanisms leading up to compression-after-impact (CAI) failure is studied in particle-toughened and untoughened systems. Microfocus computed tomography (?CT) enabled non-destructive monitoring of the internal damage development in three-dimensions (3D) by taking scans after impact, after an application of near failure compression loads and after coupon failure. In combination with ?CT work, mechanical CAI testing and ultrasonic C-scans were conducted to determine the effect of the projected damage area on residual CAI strength and to complement the observations made from ?CT scans. The important role of the undamaged "cone" of material immediately under the impact site for out-of-plane sublaminate stability is identified. The implication of delamination growth into this region is discussed. It was found that where particle-toughened systems suppressed delamination growth into this region, greater residual CAI strength was maintained on a like-for-like projected damage area
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