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   <subfield code="a">Biaxial stress effects on the elastic-plastic crack-tip displacement fields</subfield>
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   <subfield code="a">Sommario: Viene presentato uno studio agli elementi finiti con un approccio allo strato limite del caricamento monotono seconda il Modo I di una fessura stazionaria in condizioni di stato di tensione piana e plasticità contenuta. Viene esaminata in particolare l'influenza che la componente tensionale elastica trasversale nonsingolare (i.e. T-stress) delle condizioni al contorno ha sullo stato di sollecitazione elasto-plastica all'apice della fessura. Si osserva che questo parametro dello stato di biassialità all'apice di fessure controlla sia l'estensione della zona plastica che lo stato deformativo al suo interno. Le soluzioni numeriche vengono inoltre impiegate per simulare sistemi di frange moirè interferometriche fornendo così un utile strumento di confronto con precedenti risultati sperimentali.</subfield>
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