Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/12870
Title: | Mixed Bending-Tension (MBT) test for mode I interlaminar and intralaminar fracture |
Author: | Macedo, F. S. Pereira, A. B. Morais, A. B. de |
Keywords: | Polymer-matrix composites (PMCs) Delamination Fracture toughness Finite element analysis (FEA) |
Issue Date: | 21-May-2012 |
Publisher: | Elsevier |
Abstract: | A new Mixed Bending-Tension (MBT) test is proposed for mode I fracture of laminated composites. The MBT specimen consists of a relatively small pre-cracked laminate adhesively bonded to pin-loaded steel beams. This design reduces significantly the bending stresses that prevent successful application of DCB tests to certain laminates. The MBT was here applied to carbon/epoxy unidirectional [0º]26 and [90º]26 laminates with starter delaminations. Interlaminar initiation GIC values of [0º]26 laminates agreed well with previous DCB test results, while [90º]26 laminates exhibited 50 % higher values. Significant lengths of fairly planar intralaminar crack propagation were seen in the latter laminates. The results showed a fibre bridging related R-curve, which was more pronounced in [0º]26 laminates. The consistency of the present results indicates that the MBT opens new possibilities for the interlaminar and intralaminar mode I fracture. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/12870 |
DOI: | 10.1016/j.compscitech.2012.03.023 |
ISSN: | 0266-3538 |
Appears in Collections: | DEM - Artigos |
Files in This Item:
File | Description | Size | Format | |
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art_CST_MBT.pdf | 718.77 kB | Adobe PDF |
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