Optimal design of active, passive, and hybrid sandwich structures

2008 ◽  
Author(s):  
A. L. Araújo ◽  
C. M. Mota Soares ◽  
C. A. Mota Soares
Keyword(s):  
Optimal Design ◽  
Sandwich Structures

scholarly journals Synergistic effects of halloysite nanotubes with metal and phosphorus additives on the optimal design of eco-friendly sandwich panels with maximum flame resistance and minimum weight

2021 ◽  
Vol 11 (1) ◽  
pp. 252-265
Author(s):  
Saeed Kamarian ◽  
Ruiwen Yu ◽  
Jung-il Song
Keyword(s):  
Optimal Design ◽  
Failure Modes ◽  
Sandwich Structures ◽  
Synergistic Effects ◽  
Minimum Weight ◽  
Computational Cost ◽  
Sandwich Panels ◽  
Halloysite Nanotubes ◽  
Flame Resistance ◽  
Cone Calorimeter Test

Abstract The present work addresses the optimal design of sandwich panels made of flax fabric (FF)/vinyl ester (VE) composite face sheets and honeycomb VE core. The sandwich structures are first optimized in terms of flammability by obtaining the best combination of ammonium polyphosphate (APP), halloysite nanotube (HNT), and magnesium hydroxide (MH) as three flame retardants (FRs). Using the Taguchi method and horizontal burning test, it is shown that [6, 3, and 3%] and [1, 0.5, and 0%] are the optimal combinations of APP, HNT, and MH for the face sheets and core, respectively. Cone calorimeter test results indicate that the optimal FR combinations significantly decrease the mass lost rate (MLR), heat rate release (HRR), total smoke release (TSR), and maximum average release heat emission (MARHE). The FR sandwich structures are then geometrically optimized under compressive loads based on their weight. Different failure modes are considered as the design constraints of the optimization problem. Imperialist competitive algorithm (ICA), as a powerful meta-heuristic algorithm, is implemented to considerably reduce the computational cost of the optimization process. The results of this study show that proper combinations of FR additives can increase the flame retardancy while decreasing the weight of sandwich panels.

Optimal Design of Corrugated Ribbon Sandwich Structure Subjected to Biaxial Shear Loads

2013 ◽  
Vol 773 ◽  
pp. 549-554
Author(s):  
Shi Dong Pan ◽  
Zhen Gong Zhou ◽  
Lin Zhi Wu
Keyword(s):  
Shear Strength ◽  
Optimal Design ◽  
Sandwich Structure ◽  
Sandwich Structures ◽  
Design Concept ◽  
Shear Properties ◽  
Shear Loads ◽  
Analytical Results

In this paper, in order to enhance the equivalent shear strength of the corrugated ribbon sandwich structures, one new optimal design concept is brought forward to design the corrugated ribbon sandwich structures subjected to biaxial shear loads. Based on the performance harmony concept, the equivalent shear properties have been investigated and given. Analytical results show that the equivalent shear properties of the corrugated ribbon sandwich structure depend on not only the lattice truss cores, but also the facesheets, the interface and the shear loads imposed on the facesheets.

scholarly journals Optimal design for active damping in sandwich structures using the Direct MultiSearch method

2013 ◽  
Vol 105 ◽  
pp. 29-34 ◽  
Author(s):  
A.L. Araújo ◽  
J.F.A. Madeira ◽  
C.M. Mota Soares ◽  
C.A. Mota Soares
Keyword(s):  
Optimal Design ◽  
Sandwich Structures ◽  
Active Damping

Genetic Algorithm and Performance Indices Applied to Optimal Design of Sandwich Structures

1998 ◽  
pp. 387-395 ◽  
Author(s):  
D. Bassetti ◽  
Y. Brechet ◽  
G. Heiberg ◽  
I. Lingorski ◽  
P. Pechambert
Keyword(s):  
Genetic Algorithm ◽  
Optimal Design ◽  
Sandwich Structures ◽  
Performance Indices ◽  
And Performance

Crack divergence phenomena in tempered glass

2020 ◽  
Vol 13 (3) ◽  
pp. 115-129
Author(s):  
Shin’ichi Aratani
Keyword(s):  
Optimal Design ◽  
High Speed ◽  
Glass Plate ◽  
Acute Angle ◽  
Divergence Angle ◽  
High Speed Photography ◽  
Tempered Glass ◽  
Thick Glass

High speed photography using the Cranz-Schardin camera was performed to study the crack divergence and divergence angle in thermally tempered glass. A tempered 3.5 mm thick glass plate was used as a specimen. It was shown that two types of bifurcation and branching existed as the crack divergence. The divergence angle was smaller than the value calculated from the principle of optimal design and showed an acute angle.

Sign in / Sign up

Export Citation Format

Share Document