Documents disponibles écrits par cet auteur

Dynamic response of composite beams with partial shear interaction using a higher-order beam theory / Chakrabarti, A. in Journal of structural engineering, Vol. 139 N° 1 (Janvier 2013) 

Public ISBD [article]  in Journal of structural engineering > Vol. 139 N° 1 (Janvier 2013) . - pp. 47–56 Titre : Dynamic response of composite beams with partial shear interaction using a higher-order beam theory Type de document : texte imprimé Auteurs : Chakrabarti, A., Auteur ; Sheikh, A. H., Auteur ; M. Griffith, Auteur Année de publication : 2013 Article en page(s) : pp. 47–56 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Composite  beam  Partial  shear  interaction  Higher-order  beam  theory  Finite  element  Dynamic  response  Vibration Résumé : Dynamic response of composite beams with partial interaction is presented using a one-dimensional finite-element model based on a higher-order beam theory. The proposed model takes into account the effect of partial shear interaction between the adjacent layers, as well as the transverse shear deformation of the beam. A third order variation of the axial displacement of the fibers over the beam depth is taken to have a parabolic variation of shear stress, which vanishes at both the top and bottom fibers of the transverse composite surface, as clearly derived on the free and tangentially unloaded surface of the continua. In the proposed finite-element model, there is no need to incorporate any shear correction factor, and the model is free from the shear locking problem. The proposed numerical model is validated by comparing the results with those available in the literature. Many new results are presented, because there are no published results on vibration and buckling of composite beams based on higher-order beam theory. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000603 [article] Dynamic response of composite beams with partial shear interaction using a higher-order beam theory [texte imprimé] / Chakrabarti, A., Auteur ; Sheikh, A. H., Auteur ; M. Griffith, Auteur . - 2013 . - pp. 47–56. Génie Civil Langues : Anglais (eng) in Journal of structural engineering > Vol. 139 N° 1 (Janvier 2013) . - pp. 47–56 Mots-clés : Composite  beam  Partial  shear  interaction  Higher-order  beam  theory  Finite  element  Dynamic  response  Vibration Résumé : Dynamic response of composite beams with partial interaction is presented using a one-dimensional finite-element model based on a higher-order beam theory. The proposed model takes into account the effect of partial shear interaction between the adjacent layers, as well as the transverse shear deformation of the beam. A third order variation of the axial displacement of the fibers over the beam depth is taken to have a parabolic variation of shear stress, which vanishes at both the top and bottom fibers of the transverse composite surface, as clearly derived on the free and tangentially unloaded surface of the continua. In the proposed finite-element model, there is no need to incorporate any shear correction factor, and the model is free from the shear locking problem. The proposed numerical model is validated by comparing the results with those available in the literature. Many new results are presented, because there are no published results on vibration and buckling of composite beams based on higher-order beam theory. ISSN : 0733-9445 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29ST.1943-541X.0000603

Parametric study on the dynamic instability behavior of laminated composite stiffened plate / Patel, S. N. in Journal of engineering mechanics, Vol. 135 N° 11 (Novembre 2009) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 135 N° 11 (Novembre 2009) . - pp. 1331-1341 Titre : Parametric study on the dynamic instability behavior of laminated composite stiffened plate Type de document : texte imprimé Auteurs : Patel, S. N., Auteur ; P. K. Datta, Auteur ; Sheikh, A. H., Auteur Article en page(s) : pp. 1331-1341 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Finite  element  method  Plates  Parameters  Stiffening. Résumé : This paper deals with the study of dynamic or parametric instability behavior of laminated composite stiffened plates with step-uniform and concentrated in-plane harmonic edge loading. The eight-noded isoparametric degenerated shell element and a compatible three-noded curved beam element are used to model the plate and the stiffeners, respectively. The method of Hill's infinite determinant is applied to analyze the dynamic instability regions. Numerical results are presented through convergence and comparison with the published results from the literature. The effects of parameters like loading type, stiffening scheme, lamination scheme, dynamic load factor, and boundary conditions are considered in the dynamic instability analysis of laminated composite stiffened plate. It has been shown that the type of loading and the width of loading have remarkable effect on the dynamic instability characteristics of the stiffened plate. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...] [article] Parametric study on the dynamic instability behavior of laminated composite stiffened plate [texte imprimé] / Patel, S. N., Auteur ; P. K. Datta, Auteur ; Sheikh, A. H., Auteur . - pp. 1331-1341. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 135 N° 11 (Novembre 2009) . - pp. 1331-1341 Mots-clés : Finite  element  method  Plates  Parameters  Stiffening. Résumé : This paper deals with the study of dynamic or parametric instability behavior of laminated composite stiffened plates with step-uniform and concentrated in-plane harmonic edge loading. The eight-noded isoparametric degenerated shell element and a compatible three-noded curved beam element are used to model the plate and the stiffeners, respectively. The method of Hill's infinite determinant is applied to analyze the dynamic instability regions. Numerical results are presented through convergence and comparison with the published results from the literature. The effects of parameters like loading type, stiffening scheme, lamination scheme, dynamic load factor, and boundary conditions are considered in the dynamic instability analysis of laminated composite stiffened plate. It has been shown that the type of loading and the width of loading have remarkable effect on the dynamic instability characteristics of the stiffened plate. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JENMDT000 [...]