Determination of the length of a short crack at a v-notch from a full field measurement |
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Authors: | D Leguillon |
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Institution: | Institut Jean le Rond d’Alembert – CNRS UMR 7190, Université Pierre et Marie Curie – Paris 6, 4 place Jussieu, case 162, 75252 Paris Cedex 05, France |
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Abstract: | Determination of the length of a short crack at the root of a v-notch, from a full kinematic field measurement, is performed using a direct method. It is based on a matched asymptotic expansions procedure together with the theory of singularities. The first corrective term of the outer expansion can be straightforwardly expressed as a function of the crack length. Its extraction is achieved through the calculation of the associated generalized stress intensity factors for elastic homogeneous materials as well as bimaterials. Numerical simulations are carried out on a finite element solution disturbed by a random noise. In addition, the method used to compute the generalized stress intensity factors proved accurate and robust. |
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