Efficient Volume Reconstruction for Parallel-Beam Computed Laminography by Filtered Backprojection on Multi-Core Clusters

Myagotin, Anton; Voropaev, Alexey; Helfen, Lukas; Hänschke, Daniel; Baumbach, Tilo

doi:10.1109/tip.2013.2285600

Cited by 54 publications

(37 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…1a). A series of 1500 radiographs is then used to reconstruct 3D volumes by using a filtered-backprojection algorithm (Myagotin et al 2013). The reconstructed volumes represent the scanned region with a size of 2040 × 2040 × 2040 voxels.…”

Section: Materials and Experimental Setupmentioning

confidence: 99%

Slant strained band development during flat to slant crack transition in AA 2198 T8 sheet: in situ 3D measurements

et al. 2015

Self Cite

View full text Add to dashboard Cite

International audienceIn this work 3D strain and damage analyses are performed in the immediate vicinity of the notch root of a at CT-like specimen made of aluminum alloy. Experimental data, partially exploited by Morgeneyer et al (2014b), were obtained by using synchrotron laminography and the 3D reconstructed volumes are subsequently analyzed via Digital Volume Correlation. These data enable for in situ assessments of strain elds and ductile damage in the zone where the stress triaxiality evolves from elevated to lower levels, which is accompanied by at-to-slant crack transition. The measured strain eld patterns in this area are analyzed herein in a systematic manner by studying the incremental strain activity during several loading steps. It is shown that from the very beginning of the loading history multiple slant strained bands appear in front of the notch root while the corresponding damage growth sets in at later loading stages and higher strains. The activity of the dierent strained bands at the notch root is alternating between dierent locations over the loading history. However, the band leading to nal rupture is always active. The region where slant fracture occurs is identied to be in plane strain condition with respect to the crack propagation direction

show abstract

Section: Materials and Experimental Setupmentioning

confidence: 99%

Slant strained band development during flat to slant crack transition in AA 2198 T8 sheet: in situ 3D measurements

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The scans were conducted at a pixel size of 1.4 μm, with a detector size of 2040x2040 pixels. The reconstructions were performed using an algorithm based on filtered back--projection [37], with an in--built ring correction to minimise such artefacts in the reconstructed volumes.…”

Section: Synchrotron Radiation Computed Laminographymentioning

confidence: 99%

Interlaminar fracture micro-mechanisms in toughened carbon fibre reinforced plastics investigated via synchrotron radiation computed tomography and laminography

Borstnar

Mavrogordato

Helfen

et al. 2015

Composites Part A: Applied Science and Manufacturing

View full text Add to dashboard Cite

Synchrotron Radiation Computed Tomography (SRCT) and Synchrotron Radiation ComputedLaminography (SRCL) permit 3D non--destructive evaluation of fracture micro--mechanisms at high spatial resolutions. Two types of particle--toughened Carbon Fibre Reinforced Polymer (CFRP) composites were loaded to allow crack growth in Modes I and II to be isolated and observed in standard and non--standard specimen geometries. Both materials failed in complex and distinct failure modes, showing that interlaminar fracture in these materials involves a process zone rather than a singular crack tip. The work indicates that incorporating particle/resin, fibre/interlayer and neat resin failure is essential within models for material response, since the competition between these mechanisms to provide the energetically favourable crack path influences the macro--scale toughness. The work uniquely combines the strengths of SRCT and SRCL to compare failure micro--mechanisms between two specimen geometries, whilst assessing any edge effects and providing powerful insight into the complex micro--mechanical behaviour of these materials.

show abstract

“…This axis is inclined with respect to the X-ray beam direction by an angle θ ≈ 60 • . The series of radiographs is then used to reconstruct 3D volumes via filtered-back projection [49]. A GPU-accelerated implementation of this algorithm [50] has been utilized herein.…”

Section: Methodsmentioning

confidence: 99%

Experimental-Numerical Validation Framework for Micromechanical Simulations

Buljac

Shakoor

Neggers

et al. 2017

Multiscale Modeling of Heterogeneous Structures

Self Cite

View full text Add to dashboard Cite

A combined experimental-numerical framework is presented in order to validate computations at the microscale. It is illustrated for a flat specimen with two holes, which is made of cast iron and imaged via in situ synchrotron laminography at micrometer resolution during a tensile test. The region in the reconstructed volume between the two holes is analyzed via Digital Volume Correlation (DVC) to measure displacement fields. Finite Element (FE) simulations, whose mesh is made consistent with the studied material microstructure, are driven by measured Dirichlet boundary conditions. Damage levels and gray level residuals for DVC measurements and FE simulations are assessed for validation purposes.

show abstract

Efficient Volume Reconstruction for Parallel-Beam Computed Laminography by Filtered Backprojection on Multi-Core Clusters

Cited by 54 publications

References 49 publications

Slant strained band development during flat to slant crack transition in AA 2198 T8 sheet: in situ 3D measurements

Slant strained band development during flat to slant crack transition in AA 2198 T8 sheet: in situ 3D measurements

Interlaminar fracture micro-mechanisms in toughened carbon fibre reinforced plastics investigated via synchrotron radiation computed tomography and laminography

Experimental-Numerical Validation Framework for Micromechanical Simulations

Contact Info

Product

Resources

About