Abstract
A simple compliance approach is presented for the determination of crack-interface bridging stresses inquasi-brittle materials. This technique is based upon the consideration that an unloading compliance measured experimentally differs from the linear elastic compliance of the same crack length because of the influence of the bridging stresses. A general crack-interface bridging theory is developed from which the bridging stresses can be obtained utilizing the difference in these compliances. Experimental data from a range of engineering materials including alumina and duplex ceramics, cellulose fibre cements and carbon fibre/epoxy composites are used to verify the bridging theory and several interesting results are obtained. A novel toughness curve obtained with a new compliance φ function is presented and used to elucidate the crack-interface bridging associatedR curve behaviour.
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Hu, X.Z., Mai, Y.W. General method for determination of crack-interface bridging stresses. J Mater Sci 27, 3502–3510 (1992). https://doi.org/10.1007/BF01151826
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DOI: https://doi.org/10.1007/BF01151826