Fracture behavior of multidirectional DCB specimen / Raghu Prasad, B. K. in Journal of engineering mechanics, Vol. 135 N° 10 (Octobre 2009)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 135 N° 10 (Octobre 2009) . - pp. 1119-1128 Titre : Fracture behavior of multidirectional DCB specimen : higher-order beam theories Type de document : texte imprimé Auteurs : Raghu Prasad, B. K., Auteur ; Pavan Kumar, D. V. T. G., Auteur Année de publication : 2009 Article en page(s) : pp. 1119-1128 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Composite structures Delaminating Cracking Shear deformation Toughness Theories. Résumé : Mathematical models, for the stress analysis of symmetric multidirectional double cantilever beam (DCB) specimen using classical beam theory, first and higher-order shear deformation beam theories, have been developed to determine the Mode I strain energy release rate (SERR) for symmetric multidirectional composites. The SERR has been calculated using the compliance approach. In the present study, both variationally and nonvariationally derived matching conditions have been applied at the crack tip of DCB specimen. For the unidirectional and cross-ply composite DCB specimens, beam models under both plane stress and plane strain conditions in the width direction are applicable with good performance where as for the multidirectional composite DCB specimen, only the beam model under plane strain condition in the width direction appears to be applicable with moderate performance. Among the shear deformation beam theories considered, the performance of higher-order shear deformation beam theory, having quadratic variation for transverse displacement over the thickness, is superior in determining the SERR for multidirectional DCB specimen. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...] [article] Fracture behavior of multidirectional DCB specimen : higher-order beam theories [texte imprimé] / Raghu Prasad, B. K., Auteur ; Pavan Kumar, D. V. T. G., Auteur . - 2009 . - pp. 1119-1128. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 135 N° 10 (Octobre 2009) . - pp. 1119-1128 Mots-clés : Composite structures Delaminating Cracking Shear deformation Toughness Theories. Résumé : Mathematical models, for the stress analysis of symmetric multidirectional double cantilever beam (DCB) specimen using classical beam theory, first and higher-order shear deformation beam theories, have been developed to determine the Mode I strain energy release rate (SERR) for symmetric multidirectional composites. The SERR has been calculated using the compliance approach. In the present study, both variationally and nonvariationally derived matching conditions have been applied at the crack tip of DCB specimen. For the unidirectional and cross-ply composite DCB specimens, beam models under both plane stress and plane strain conditions in the width direction are applicable with good performance where as for the multidirectional composite DCB specimen, only the beam model under plane strain condition in the width direction appears to be applicable with moderate performance. Among the shear deformation beam theories considered, the performance of higher-order shear deformation beam theory, having quadratic variation for transverse displacement over the thickness, is superior in determining the SERR for multidirectional DCB specimen. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JENMDT&smode=strres [...]

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