Design manufacture and test of a cryo-stable Offner relay using aluminum foam core optics

2001 ◽  
Author(s):  
Ryan S. McClelland ◽  
David A. Content
Keyword(s):  
Aluminum Foam ◽  
Foam Core

Deformation and Energy Absorption of Aluminum Foam Filled Square Tubes

2012 ◽  
Vol 585 ◽  
pp. 34-38 ◽  
Author(s):  
Manmohan Dass Goel ◽  
Laxminarayan Krishnappa
Keyword(s):  
Energy Absorption ◽  
Aluminum Foam ◽  
Absorption Capacity ◽  
Stress Wave Propagation ◽  
Foam Core ◽  
Absorption Studies ◽  
Foam Filled ◽  
Experimental Trials ◽  
Deformation Modes ◽  
Tube Structure

Modeling and numerical simulation of aluminum foam filled square tubes under axial impact loading is presented. The foam-filled thin-walled square tubes are modeled as shell wherein, foam core is modeled by incorporating visco-elastic plastic foam model in Altair® RADIOSS. Deformation and energy absorption studies with single, bi-tubular, and multi-tube structure with and without aluminum foam core are carried out for assessing its effectiveness in crashworthiness under the identical conditions. It is observed that the multi-tube structure with foam core modify the deformation modes considerably and results in substantial increase in energy absorption capacity in comparison with the single and multi-tube without foam core. Moreover, the multi-tube foam filled structure shows complicated deformation modes due to the significant effect of stress wave propagation. This study will help automotive industry to design superior crashworthy components with multi-tube foam filled structures and will reduce the experimental trials by conducting the numerical simulations.

The U-Bending Forming of Aluminum Foam Sandwich Panels

2013 ◽  
Vol 477-478 ◽  
pp. 1432-1439
Author(s):  
Sheng Gui Chen ◽  
Hai Bin Chen ◽  
Zhen Zhong Sun ◽  
Rong Yong Li ◽  
Wei Feng He ◽  
...  
Keyword(s):  
Aluminum Foam ◽  
Deformation Mode ◽  
Bending Test ◽  
Foam Core ◽  
Blank Holder Force ◽  
Blank Holder ◽  
Variable Blank Holder Force ◽  
Forming Technology ◽  
Bending Process ◽  
Deformation Defects

The U-bending process of aluminum foam sandwich (AFS) is investigated, and a punch bending test is carried out in this paper. We discussed the bending deformation mode and generated the load & stroke curve of AFS panel by experiments. Macroscopic and microscopic punch forming mechanisms of AFS panels are analyzed by testing experiments and plasticity theory. We study the major deformation defects of AFS forming such as the delamination between the panel and the foam core, the excessive thinning of panels in the round corner, and shear stress cracks of the foam core. A conclusion is drawn on the panels variable blank holder force (VBHF) and the striking block control on the round corner, which would promote the forming technology of AFS.

Failure of sandwich beams consisting of alumina face sheet and aluminum foam core in bending

2005 ◽  
Vol 409 (1-2) ◽  
pp. 292-301 ◽  
Author(s):  
Kapil Mohan ◽  
Yip Tick Hon ◽  
Sridhar Idapalapati ◽  
Hong Pheow Seow
Keyword(s):  
Aluminum Foam ◽  
Face Sheet ◽  
Foam Core ◽  
Sandwich Beams

Use of aluminum foam core sandwich structures to improve the blast-mitigation performance of light tactical vehicle side-vent-channel solution

2016 ◽  
Vol 232 (12) ◽  
pp. 993-1011
Author(s):  
M Grujicic ◽  
R Yavari ◽  
JS Snipes ◽  
S Ramaswami
Keyword(s):  
Design Optimization ◽  
Aluminum Foam ◽  
Sandwich Structures ◽  
Optimization Methods ◽  
Gaseous Detonation ◽  
Rocket Engines ◽  
Foam Core ◽  
Blast Mitigation ◽  
Detonation Products ◽  
Tactical Vehicle

In our recent work, a side-vent-channel blast-mitigation concept/solution for light tactical vehicles was proposed. As a part of this solution, side-vent channels are attached to the V-shaped vehicle underbody, in order to promote venting of the soil ejecta and gaseous detonation products and, in turn, generate a downward thrust on the targeted light tactical vehicle. As a consequence, the blast loads resulting from a shallow-buried mine detonated underneath a light tactical vehicle are mitigated, improving the probability for vehicle survival. The concept was motivated by the principles of operation of the so-called “pulse detonation” rocket engines. To quantify the utility and blast-mitigation capacity of this concept, use was made of several computational and design optimization methods and tools in our prior work. It was found that the capacity of the proposed blast-mitigation solution is relatively small, but still noteworthy. The present work focuses on further improvements in the blast-mitigation capacity of the side-vent-channel solution. Specifically, the benefits offered by substitution of the all-steel side-vent channels with side-vent channels made of sandwich structures (consisting of steel face-sheets and aluminum foam core) for all-steel side-vent channels are explored. The results obtained clearly demonstrated that this substitution can improve the blast-mitigation efficiency of the side-vent-channel solution. In addition, through the use of a design optimization analysis, it was established that this improvement can be further increased through proper grading of the aluminum foam density profile through the sandwich structure core.

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