PHOTOELASTIC GENERAL METHOD TO DETERMINE STRESS INTENSITY FACTORS KI AND KII / UMA GENERALIZAÇÃO DOS MÉTODOS DE DETERMINAÇÃO DOS FATORES DE INTENSIDADE DE TENSÃO KI E KII ATRAVÉS DA FOTOELASTICIDADE

AUTOR(ES)

TIAGO FERREIRA DA COSTA

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

11/04/1986

RESUMO

A computational method has been developed to determine mixed-mode stress intensity factors from isochromatic fringe patterns. The method proposes a general formulation of the stress field around a crack tip. It searches to obtain not only the stress intensity factors but also all the other non-singular stress field parameters, associated to different geometries, which interfere with the singular field near the crack. The method has been tested in bars with 90 and 45 degree cracks and the results, compared to experimental and analytical data found in literature. Three factors influencing in KI and KII determination have been studied: the quantity of data collecting points, its position and number of parameters considered in the non-singular field. Three models of transverse butt welded joints with 45 and 90 degrees cracks placed in different positions relative to weld reinforcement, have been analyzed as application examples.

ASSUNTO(S)

fotoelasticidade photoelasticity fatores de intensificacao de tensoes stress intensity factors

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