On Analytical and Numerical Studies of Composite Structures Including Piezoelectric Elements

2009 ◽  
Author(s):  
A. Fernandes ◽  
J. Pouget
Keyword(s):  
Composite Structures ◽  
Numerical Studies ◽  
Piezoelectric Elements

scholarly journals Improved Analytical Method for Interfacial-Slip Control Design of Steel–Concrete Composite Structures

Symmetry ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1225
Author(s):  
Hua-Ping Wang ◽  
Tao Song ◽  
Jian-Wei Yan ◽  
Ping Xiang ◽  
Si-Yuan Feng ◽  
...  
Keyword(s):  
Analytical Model ◽  
Composite Structures ◽  
Interfacial Interaction ◽  
Design Parameters ◽  
Interfacial Slip ◽  
Interfacial Effect ◽  
Slip Control ◽  
Numerical Studies ◽  
First Time ◽  
Methods Numerical

Interfacial performance is quite significant for maintaining the structural performance of steel–concrete composite structures. Quantitative assessment on the interfacial effect is critical. For this reason, theoretical investigation on the interfacial interaction of steel–concrete composites was performed, with the symmetry of the model considered. Influence of interfacial slip on the mechanical properties of the composites was considered. Analytical solutions of the interfacial slip and strain were provided. The accuracy of the predictions from the improved analytical model was validated by comparing them against the results from experimental and numerical studies. The influence of design parameters of the composite members on the interfacial effect was discussed. The proposed analytical model was also employed to assess the effect of the bond developing at the interface between concrete and steel on the deformation exhibited by simple composite structural forms (e.g., beams). Through the analysis, the priority design parameters of the composite structures are determined for controlling the level of interfacial slip in order to achieve optimum bearing capacity. Different to commonly used energy methods, numerical methods and finite element methods, the study provides a simple and straightforward analytical solution for describing the interfacial interaction of composite structures for the first time, which can act as scientific instruction for the interfacial slip control of composite materials and structures.

scholarly journals A literature review on cold-formed steel-timber composite structures

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 8489-8508
Author(s):  
Fabiana Y. Moritani ◽  
Carlos E. J. Martins ◽  
Alfredo M. P. G. Dias
Keyword(s):  
Literature Review ◽  
Fire Resistance ◽  
Composite Structures ◽  
State Of The Art ◽  
Dynamic Properties ◽  
Review Literature ◽  
Comprehensive Description ◽  
Cross Laminated Timber ◽  
Numerical Studies ◽  
Cold Formed Steel

State-of-the-art steel-timber composite structures (STC), using cold-formed steel (CFS) and cross-laminated timber (CLT), are considered in this review. Literature on this type of construction solution is reviewed to provide an overview of the characteristics and advantages of STC. Previous experimental and numerical studies with STC structures, mainly composite solutions with CFS beams and CLT panels, are discussed to assess the behavior of this structural typology. A comprehensive description of the connection systems performance in different STC structures is also provided. Furthermore, the design and analytical methods currently available are presented. Likewise, details on aspects related to dynamic properties and fire resistance are discussed.

scholarly journals Modal Analysis of Laminated “CAS” and “CUS” Box-Beams

2017 ◽  
Vol 64 (4) ◽  
pp. 441-454 ◽  
Author(s):  
Jarosław Gawryluk ◽  
Marcin Bocheński ◽  
Andrzej Teter
Keyword(s):  
Modal Analysis ◽  
Mode Coupling ◽  
Composite Structures ◽  
Vibration Mode ◽  
Coupling Effect ◽  
Experimental Modal Analysis ◽  
Vibration Modes ◽  
The Finite Element Method ◽  
Numerical Studies ◽  
Box Beams

Abstract In the paper, the authors discuss the numerical and experimental modal analysis of the cantilever thin-walled beams made of a carbon-epoxy laminate. Two types of beams were considered: circumferentially asymmetric stiffness (i.e., CAS) and circumferentially uniform stiffness (i.e., CUS) beams. The layer-up configurations of the laminate were chosen to get a vibration mode coupling effect in both analysed cases. The aim of the paper was to perform the numerical and experimental modal analysis of the composite structures, when a flapwise bending with torsion coupling effect or flapwise-chordwise bending coupling effect took place. Firstly, numerical studies by the finite element method was performed. The numerical simulations were carried out by the Lanczos method in the Abaqus software package. The natural frequencies and the corresponding free vibration modes were determined. Next, the experimental modal analyses of the CAS and CUS beams were performed. The test stand was consisted of a special grip, two beams with an adhered holder, the LMS Scadas III system with a modal hammer and an acceleration sensor. Finally, the results of both methods were compared.

scholarly journals A literature review on cold-formed steel-timber composite structures

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 8489-8508
Author(s):  
Fabiana Y. Moritani ◽  
Carlos E. J. Martins ◽  
Alfredo M. P. G. Dias
Keyword(s):  
Literature Review ◽  
Fire Resistance ◽  
Composite Structures ◽  
State Of The Art ◽  
Dynamic Properties ◽  
Review Literature ◽  
Comprehensive Description ◽  
Cross Laminated Timber ◽  
Numerical Studies ◽  
Cold Formed Steel

State-of-the-art steel-timber composite structures (STC), using cold-formed steel (CFS) and cross-laminated timber (CLT), are considered in this review. Literature on this type of construction solution is reviewed to provide an overview of the characteristics and advantages of STC. Previous experimental and numerical studies with STC structures, mainly composite solutions with CFS beams and CLT panels, are discussed to assess the behavior of this structural typology. A comprehensive description of the connection systems performance in different STC structures is also provided. Furthermore, the design and analytical methods currently available are presented. Likewise, details on aspects related to dynamic properties and fire resistance are discussed.

In Situ microscopy of the anodic etching of silicon

1995 ◽  
Vol 53 ◽  
pp. 232-233
Author(s):  
Frances M. Ross ◽  
Peter C. Searson
Keyword(s):  
Composite Structures ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Properties ◽  
Selective Etching ◽  
Silicon On Insulator ◽  
Second Phase ◽  
Porous Layers ◽  
New Class ◽  
Porous Semiconductors

Porous semiconductors represent a relatively new class of materials formed by the selective etching of a single or polycrystalline substrate. Although porous silicon has received considerable attention due to its novel optical properties1, porous layers can be formed in other semiconductors such as GaAs and GaP. These materials are characterised by very high surface area and by electrical, optical and chemical properties that may differ considerably from bulk. The properties depend on the pore morphology, which can be controlled by adjusting the processing conditions and the dopant concentration. A number of novel structures can be fabricated using selective etching. For example, self-supporting membranes can be made by growing pores through a wafer, films with modulated pore structure can be fabricated by varying the applied potential during growth, composite structures can be prepared by depositing a second phase into the pores and silicon-on-insulator structures can be formed by oxidising a buried porous layer. In all these applications the ability to grow nanostructures controllably is critical.

Experimental and numerical studies of radiative shocks

2006 ◽  
Vol 133 ◽  
pp. 1013-1017 ◽  
Author(s):  
C. Michaut ◽  
L. Boireau ◽  
T. Vinci ◽  
S. Bouquet ◽  
M. Koenig ◽  
...  
Keyword(s):  
Radiative Shocks ◽  
Numerical Studies
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