The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
Cezar G. Diaconu - One of the best experts on this subject based on the ideXlab platform.
-
Dynamic analysis of bi-stable composite plates
Journal of Sound and Vibration, 2009Co-Authors: Cezar G. Diaconu, Paul M. Weaver, Andres F. ArrietaAbstract:Abstract The static and dynamic transitions between stable states for rectangular bi-stable Laminated composite plates are considered. The Laminated composite plates have Nonsymmetric Laminate configurations and are subjected to thermal curing in order to introduce residual stresses and to achieve bi-stability. As geometrically nonlinear effects occur, after curing, the plates are able to take multiple stable shapes at service or room temperature. A simple model for dynamic analysis of the snap-through phenomena is proposed based on strain field approximations for the plates. Hamilton's principle is applied in conjunction with the Rayleigh–Ritz method in order to achieve fast results. The model is used to evaluate the initial displacements for the stable states and also to investigate the static and dynamic transitions from one stable state to another. Parametric studies are carried out for various aspect ratios, Laminate configurations and actuation loads and the results are compared with those obtained with finite element analysis in order to evaluate the accuracy of the model.
-
FLEXURAL CHARACTERISTICS AND LAYUP OPTIMIZATION OF LaminateD COMPOSITE PLATES UNDER HYGROTHERMAL CONDITIONS USING LAMINATION PARAMETERS
Journal of Thermal Stresses, 2003Co-Authors: Cezar G. Diaconu, Hideki SekineAbstract:The flexural characteristics and layup optimization of Laminated composite plates are examined in environmental conditions of temperature and moisture. The deflection of Laminated composite plates is analyzed in the design space of 12 lamination parameters. The layup optimization for minimizing the deflection of Laminated composite plates is carried out using all 12 lamination parameters as design variables. Mathematical programming methods are used for optimization. In hygrothermal conditions, the maximum deflection of Laminated composite plates with in-plane hygrothermal stresses can be reduced by optimized Nonsymmetric Laminate configurations.
Hideki Sekine - One of the best experts on this subject based on the ideXlab platform.
-
FLEXURAL CHARACTERISTICS AND LAYUP OPTIMIZATION OF LaminateD COMPOSITE PLATES UNDER HYGROTHERMAL CONDITIONS USING LAMINATION PARAMETERS
Journal of Thermal Stresses, 2003Co-Authors: Cezar G. Diaconu, Hideki SekineAbstract:The flexural characteristics and layup optimization of Laminated composite plates are examined in environmental conditions of temperature and moisture. The deflection of Laminated composite plates is analyzed in the design space of 12 lamination parameters. The layup optimization for minimizing the deflection of Laminated composite plates is carried out using all 12 lamination parameters as design variables. Mathematical programming methods are used for optimization. In hygrothermal conditions, the maximum deflection of Laminated composite plates with in-plane hygrothermal stresses can be reduced by optimized Nonsymmetric Laminate configurations.
F. Ju - One of the best experts on this subject based on the ideXlab platform.
-
Free-vibration analysis of composite beams with multiple delaminations
Composites Engineering, 2008Co-Authors: F. JuAbstract:Abstract A practical approach for the vibration analysis of composite beams with multiple delaminations using the finite element method is presented in this study. The present model includes bending-extension coupling and transverse shear deformation, and can be efficiently applied to the vibration analysis of composite beams with multiple delaminations under arbitrary boundary conditions. Emphasis is also given on the effect of the Nonsymmetric Laminate configuration caused by the delamination. The numerical results are in good agreement with published experimental measurements. A variety of examples, including beams with multiple delaminations, are presented. The numerical results show that the effect of delamination on the modal parameters depends on the mode number, size of the delaminations, the location of delaminations and the number of delaminations.
Andres F. Arrieta - One of the best experts on this subject based on the ideXlab platform.
-
Dynamic analysis of bi-stable composite plates
Journal of Sound and Vibration, 2009Co-Authors: Cezar G. Diaconu, Paul M. Weaver, Andres F. ArrietaAbstract:Abstract The static and dynamic transitions between stable states for rectangular bi-stable Laminated composite plates are considered. The Laminated composite plates have Nonsymmetric Laminate configurations and are subjected to thermal curing in order to introduce residual stresses and to achieve bi-stability. As geometrically nonlinear effects occur, after curing, the plates are able to take multiple stable shapes at service or room temperature. A simple model for dynamic analysis of the snap-through phenomena is proposed based on strain field approximations for the plates. Hamilton's principle is applied in conjunction with the Rayleigh–Ritz method in order to achieve fast results. The model is used to evaluate the initial displacements for the stable states and also to investigate the static and dynamic transitions from one stable state to another. Parametric studies are carried out for various aspect ratios, Laminate configurations and actuation loads and the results are compared with those obtained with finite element analysis in order to evaluate the accuracy of the model.
Paul M. Weaver - One of the best experts on this subject based on the ideXlab platform.
-
Dynamic analysis of bi-stable composite plates
Journal of Sound and Vibration, 2009Co-Authors: Cezar G. Diaconu, Paul M. Weaver, Andres F. ArrietaAbstract:Abstract The static and dynamic transitions between stable states for rectangular bi-stable Laminated composite plates are considered. The Laminated composite plates have Nonsymmetric Laminate configurations and are subjected to thermal curing in order to introduce residual stresses and to achieve bi-stability. As geometrically nonlinear effects occur, after curing, the plates are able to take multiple stable shapes at service or room temperature. A simple model for dynamic analysis of the snap-through phenomena is proposed based on strain field approximations for the plates. Hamilton's principle is applied in conjunction with the Rayleigh–Ritz method in order to achieve fast results. The model is used to evaluate the initial displacements for the stable states and also to investigate the static and dynamic transitions from one stable state to another. Parametric studies are carried out for various aspect ratios, Laminate configurations and actuation loads and the results are compared with those obtained with finite element analysis in order to evaluate the accuracy of the model.
