A Concept for Experimentally Evaluating the Effect of Friction in the 4-ENF Interlaminar Toughness Test
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Abstract
The 4-point end notched flexure test (4-ENF) has been proposed as a test method for measuring the Mode II interlaminar fracture toughness of laminated composites. However, like other Mode II test methods, there are compressive stresses acting across the delaminated interface and so the test results may be affected by friction. In this paper a strategy for experimentally establishing the significance of friction in the 4-ENF test is proposed and details of the fixture designed to implement this strategy are presented.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Structural Analysis of Composite Materials · Engineering Applied Research
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References (7)
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1. Blackman, B.R.K. & Williams, J.G. (1998). On the mode II testing of carbon-fibre polymer composites, Proceedings of the 12 th European Conference on Fracture (ECF-12), Sheffield, EMAS Publishing, Cradely Health, UK, 1411–1416.
2. Hess, M.P. (1999). Development of a zero friction Mode II test. Undergraduate Research Project, Department of Aeronautics, Imperial College, London, UK.
3. Martin, R.H. & Davidson B.D. (1997). Mode II fracture toughness evaluation using a 4-point bend end notched flexure test. Proceedings, 4 th International Conference on Deformation and Fracture of Composites, Manchester, Institute of Materials, IoM Communications Ltd, London, 243–252.
4. Martin, R.H., Elms, T. & Bowron S. (1998). Characterisation of Mode II delamination using the 4-ENF. Proceedings, 4 th European Conference on Composite Materials – Testing and Standardisation, Lisbon, Portugal, Institute of Materials, IoM Communications Ltd, London, 161–170.
5. O'Brien, T.K. 1997. Composite interlaminar shear fracture toughness, G11c: shear measurement or sheer myth? NASA Technical Memorandum 110280, NASA Langley Research Center, USA.
6. Sale, Y. (2000). Development of a “zero friction” Mode II test. Undergraduate Research Project, Department of Aeronautics, Imperial College, London, UK.
7. Schuecker, C. & Bavidson, B.D. (2000). Effect of friction on the perceived mode II delamination toughness from three-and four-point bend end-notched flexure tests, Composite Structures: Theory and Practice, ASTM STP 1383.10.1520/STP14518S ↗