期刊
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
卷 22, 期 4, 页码 1039-1054出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1099636218779420
关键词
Mixed-mode bending; low temperature; sandwich; face; core interface; fracture toughness; fatigue crack propagation
类别
资金
- Office of Naval Research [N00014-14-1-0253]
This paper experimentally investigates the effects of low temperature on fracture toughness and fatigue debond growth rate in foam core sandwich composites. Mixed-mode bending specimens were statically and cyclically tested inside a climatic chamber at a low temperature (-20 degrees C) and at room temperature (23 degrees C) as a reference. Testing was conducted in mode I (opening) and mixed-mode I/II (opening-sliding) mode mixities. The fatigue tests results are presented according to the modified Paris-Erdogan relation. Results showed substantial fracture toughness reduction due to low temperature. Low temperature furthermore elevated the cyclic crack growth rate.
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