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A new method for evaluating the crack size in a fracture mechanics test which only has force-displacement data, P-v , is introduced. This method consists in generating P-v curves of the " a constant " type, and obtain their intercepts with the experimental curve. By using P-v-a data of an A 508 C(T) specimen, and a two-dimensional finite element model, it is shown that the method contributes to generate relevant data concerning the evolution of the crack size in a test. The results obtained with the method make it possible to construct a J-R curve which is practically identical to that constructed with the original experimental data.

Análisis experimental y numérico del método del intercepto para evaluar la extensión estable de grieta en una probeta C(T) de acero