Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 38, Issue 4, Pages 1183-1191Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2006.06.007
Keywords
carbon-carbon composites (CCCs); honeycomb; fatigue
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The fatigue behaviour of honeycomb sandwich beams is experimentally investigated through four-point bending tests. Two kinds of specimens, initially undamaged and damaged by interface debonding, have been tested. The fatigue tests results are presented in standard SN diagrams with a best curve fit of the experimental data, while the fatigue limit is evaluated through a stair-case procedure. Two different failure mechanisms were found: undamaged specimen failure is due to collapse of the compressed face, while damaged specimen failure occurs due to the collapse of the honeycomb cell walls at the tip of the debonded portion. (c) 2006 Elsevier Ltd. All rights reserved.
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