scholarly journals Damage mechanisms in elastomeric foam composites: Multiscale X-ray computed tomography and finite element analyses

2019 ◽  
Vol 169 ◽  
pp. 195-202 ◽  
Author(s):  
Brendan P. Croom ◽  
Helena Jin ◽  
Bernice Mills ◽  
Jay Carroll ◽  
Kevin Long ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Finite Element ◽  
Finite Element Analyses ◽  
Damage Mechanisms ◽  
X Ray ◽  
X Ray Computed

scholarly journals Finite element simulations of the deformation of fused-cast refractories based on X-ray computed tomography

2007 ◽  
Vol 39 (1) ◽  
pp. 224-229 ◽  
Author(s):  
Kamel Madi ◽  
Samuel Forest ◽  
Michel Boussuge ◽  
Sylvain Gailliègue ◽  
Emilie Lataste ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Finite Element ◽  
Finite Element Simulations ◽  
X Ray ◽  
X Ray Computed

OS0510 Development of a finite element model of foamed plastics with X-ray computed tomography images

2013 ◽  
Vol 2013 (0) ◽  
pp. _OS0510-1_-_OS0510-2_
Author(s):  
Mai NONOGAWA ◽  
Yuya KOZUKA ◽  
Tsuyoshi NISHIWAKI ◽  
Yasumasa NAKANISHI ◽  
Takaya KOBAYASHI
Keyword(s):  
Computed Tomography ◽  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
X Ray ◽  
Computed Tomography Images ◽  
Foamed Plastics ◽  
X Ray Computed

X-Ray Computed Tomography Based Modelling of Polymeric Foams

2010 ◽  
Vol 638-642 ◽  
pp. 2761-2765 ◽  
Author(s):  
J.G.F. Wismans ◽  
J.A.W. van Dommelen ◽  
L.E. Govaert ◽  
H.E.H. Meijer
Keyword(s):  
Computed Tomography ◽  
Finite Element ◽  
Mechanical Behaviour ◽  
Experimental Approach ◽  
Mechanical Response ◽  
Polymer Foams ◽  
Polymeric Foams ◽  
X Ray ◽  
X Ray Computed

A hybrid numerical-experimental approach is used to characterize the macroscopic mechanical behaviour of polymer foams. The method is based on characterization of foams with X-ray Computed Tomography and conversion of the data to Finite Element (FE) models. Results of FE analyses revealed that plasticity has a large influence on the mechanical response of these structures.

scholarly journals Linear Elastic FE-Analysis of Porous, Laser Welded, Heat Treatable, Aluminium High Pressure Die Castings Based on X-Ray Computed Tomography Data

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1420
Author(s):  
Fabian Teichmann ◽  
Arne Ziemer ◽  
Martin Leitner ◽  
Jonas Hensel ◽  
Klaus Dilger
Keyword(s):  
Computed Tomography ◽  
Finite Element Analysis ◽  
Finite Element ◽  
High Pressure ◽  
Incomplete Fusion ◽  
Element Analysis ◽  
X Ray ◽  
Linear Elastic ◽  
X Ray Computed ◽  
Die Castings

The welding of aluminium high pressure die castings is a well known and broadly investigated challenge in various fields of industry and research. Prior research in this specific field mainly focused on the optimisation of the welding and the casting process and on the cause of the frequently occurring porosity and incomplete fusion phenomena, whereas the impacts of these defects have hardly been addressed. Therefore, the underlying study presents the investigation of weldments in EN AC-AlSi10MnMg high pressure aluminium die castings by linear elastic finite element analysis based on X-ray computed tomography as a novel approach. Hereby, four laser weldments with differing surfaces and pore contents were investigated by X-ray computed tomography and tensile testing. Based on the voxel datasets of the porous weldments, triangular finite element meshes were generated and a numerical finite element analysis was conducted. Good agreement of the stress–strain curves between the simulations and the experiments was achieved.

scholarly journals Time-Lapse Helical X-ray Computed Tomography (CT) Study of Tensile Fatigue Damage Formation in Composites for Wind Turbine Blades

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2340 ◽  
Author(s):  
Ying Wang ◽  
Lars Mikkelsen ◽  
Grzegorz Pyka ◽  
Philip Withers
Keyword(s):  
Computed Tomography ◽  
Wind Turbine ◽  
Fatigue Damage ◽  
Turbine Blades ◽  
Time Lapse ◽  
Ex Situ ◽  
Wind Turbine Blades ◽  
Damage Mechanisms ◽  
X Ray ◽  
X Ray Computed

Understanding the fatigue damage mechanisms in composite materials is of great importance in the wind turbine industry because of the very large number of loading cycles rotor blades undergo during their service life. In this paper, the fatigue damage mechanisms of a non-crimp unidirectional (UD) glass fibre reinforced polymer (GFRP) used in wind turbine blades are characterised by time-lapse ex-situ helical X-ray computed tomography (CT) at different stages through its fatigue life. Our observations validate the hypothesis that off-axis cracking in secondary oriented fibre bundles, the so-called backing bundles, are directly related to fibre fractures in the UD bundles. Using helical X-ray CT we are able to follow the fatigue damage evolution in the composite over a length of 20 mm in the UD fibre direction using a voxel size of (2.75 µm)3. A staining approach was used to enhance the detectability of the narrow off-axis matrix and interface cracks, partly closed fibre fractures and thin longitudinal splits. Instead of being evenly distributed, fibre fractures in the UD bundles nucleate and propagate locally where backing bundles cross-over, or where stitching threads cross-over. In addition, UD fibre fractures can also be initiated by the presence of extensive debonding and longitudinal splitting, which were found to develop from debonding of the stitching threads near surface. The splits lower the lateral constraint of the originally closely packed UD fibres, which could potentially make the composite susceptible to compressive loads as well as the environment in service. The results here indicate that further research into the better design of the positioning of stitching threads, and backing fibre cross-over regions is required, as well as new approaches to control the positions of UD fibres.

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