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Fracture in complex balsa cores of fiber-reinforced polymer sandwich structures
- Source :
- Construction and Building Materials. 71:194-201
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- Fracture in the complex balsa cores of fiber-reinforced polymer (FRP) sandwich beams was analyzed. The cores were composed of high- and low-density balsa layers separated by a circular adhesive interface or FRP arch. The balsa layers were cut from panels which consisted of balsa blocks adhesively bonded together. Failure in the beams was initiated by cracks propagating through the balsa core thickness. The crack locations could be predicted using the Tsai-Wu failure criterion. Cracks initiated in the lowest density blocks due to their low fracture toughness. In mixed-mode fracture, crack propagation in the radial longitudinal (RL) plane prevailed due to the low fracture toughness in RL fracture of Mode I. In pure Mode II, propagation occurred in the RL and TL (transverse longitudinal) planes to the same extent since the toughness in RL and TL fracture is similar. Cracks were not able to propagate through the transverse adhesive joints between blocks if the bonding was good. If however the bonding was poor, interface failure occurred and cracks could propagate through the adhesive layer. (C) 2014 Elsevier Ltd. All rights reserved.
- Subjects :
- Toughness
Materials science
business.industry
End-grain balsa panels
Sandwich decks
Fracture mechanics
Building and Construction
Structural engineering
Adhesively-bonded balsa blocks
Fibre-reinforced plastic
Balsa core
Transverse plane
Fracture toughness
Sandwich panels
Fracture (geology)
Fracture/failure analysis
General Materials Science
Adhesive
Composite material
business
Sandwich-structured composite
Complex core assembly
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 09500618
- Volume :
- 71
- Database :
- OpenAIRE
- Journal :
- Construction and Building Materials
- Accession number :
- edsair.doi.dedup.....45f4ab6da8e95441e4cce9b4f272cbbe