Presentation of a methodology for delamination detection within laminated structures

2006 ◽  
Vol 66 (6) ◽  
pp. 837-845 ◽  
Author(s):  
D. Coutellier ◽  
J.C. Walrick ◽  
P. Geoffroy
Keyword(s):  
Delamination Detection ◽  
Laminated Structures

Electromagnetic interference shielding anisotropy enhanced by CFRP laminated structures

2021 ◽  
Vol 203 ◽  
pp. 108616
Author(s):  
Jun Hong ◽  
Ping Xu ◽  
Hong Xia ◽  
Zhenzhen Xu ◽  
Qing-Qing Ni
Keyword(s):  
Electromagnetic Interference ◽  
Electromagnetic Interference Shielding ◽  
Laminated Structures

scholarly journals Towards Manufacturing of Ultrafine-Laminated Structures in Metallic Tubes by Accumulative Extrusion Bonding

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 389
Author(s):  
Matthew R. Standley ◽  
Marko Knezevic
Keyword(s):  
Solid State ◽  
Wall Thickness ◽  
Complex Geometry ◽  
Tube Wall ◽  
Film Theory ◽  
Radial Strain ◽  
Surface Preparation ◽  
Grain Structure ◽  
Outer Diameter ◽  
Laminated Structures

A severe plastic deformation process, termed accumulative extrusion bonding (AEB), is conceived to steady-state bond metals in the form of multilayered tubes. It is shown that AEB can facilitate bonding of metals in their solid-state, like the process of accumulative roll bonding (ARB). The AEB steps involve iterative extrusion, cutting, expanding, restacking, and annealing. As the process is iterated, the laminated structure layer thicknesses decrease within the tube wall, while the tube wall thickness and outer diameter remain constant. Multilayered bimetallic tubes with approximately 2 mm wall thickness and 25.25 mm outer diameter of copper-aluminum are produced at 52% radial strain per extrusion pass to contain eight layers. Furthermore, tubes of copper-copper are produced at 52% and 68% strain to contain two layers. The amount of bonding at the metal-to-metal interfaces and grain structure are measured using optical microscopy. After detailed examination, only the copper-copper bimetal deformed to 68% strain is found bonded. The yield strength of the copper-copper tube extruded at 68% improves from 83 MPa to 481 MPa; a 480% increase. Surface preparation, as described by the thin film theory, and the amount of deformation imposed per extrusion pass are identified and discussed as key contributors to enact successful metal-to-metal bonding at the interface. Unlike in ARB, bonding in AEB does not occur at ~50% strain revealing the significant role of more complex geometry of tubes relative to sheets in solid-state bonding.

Delamination detection in glass composites using embedded Hi-Bi photonic crystal fiber

2011 ◽  
Vol 20 (5) ◽  
pp. 055023 ◽  
Author(s):  
Sandipan M Nalawade ◽  
Narendra Mahra ◽  
K T V Grattan ◽  
Harneet V Thakur
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Glass Composites ◽  
Crystal Fiber ◽  
Delamination Detection

Transient Stresses in Laminated Structures

AIAA Journal ◽  
1973 ◽  
Vol 11 (12) ◽  
pp. 1761-1763 ◽  
Author(s):  
YING-SAN LAI
Keyword(s):  
Laminated Structures

Synthesis of ceramic-based porous gradient structures for applications in energy conversion and related fields

2016 ◽  
Vol 09 (04) ◽  
pp. 1641001
Author(s):  
Thomas Graule ◽  
Paulina Ozog ◽  
Caroline Durif ◽  
Judit Wilkens-Heinecke ◽  
Dariusz Kata
Keyword(s):  
Energy Conversion ◽  
Biomedical Applications ◽  
Uv Curing ◽  
Pore Sizes ◽  
Environmental Friendly ◽  
Laminated Structures ◽  
Tailored Design ◽  
Filtration Technology

Porous, graded ceramic structures are of high relevance in the field of energy conversion as well as in catalysis, and additionally in filtration technology and in biomedical applications. Among different technologies for the tailored design for such structures we demonstrate here a new environmental friendly UV curing-based concept to prepare laminated structures with pore sizes ranging from a few microns up to 50 microns in diameter and with porosities ranging from 10% up to 75 vol.% porosity.

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