Estimation of local stresses and elastic properties of a mortar sample by FFT computation of fields on a 3D image

Autor: Julie Escoda, Julien Sanahuja, François Willot, C. Toulemonde, Dominique Jeulin
Přispěvatelé: Centre de Morphologie Mathématique (CMM), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Matériaux et Mécanique des Composants (EDF R&D MMC), EDF R&D (EDF R&D), EDF (EDF)-EDF (EDF)
Rok vydání: 2011
Předmět:
elastic moduli
Materials science
microstructure
Fast Fourier transform
Image processing
02 engineering and technology
Homogenization (chemistry)
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph]
symbols.namesake
[INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing
0203 mechanical engineering
image analysis
Fast Fourier Transform algorithm
[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]
General Materials Science
Elastic modulus
business.industry
Building and Construction
Image segmentation
Structural engineering
021001 nanoscience & nanotechnology
020303 mechanical engineering & transports
Fourier transform
mortar
Representative elementary volume
symbols
Mortar
0210 nano-technology
business
[SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing
Zdroj: Cement and Concrete Research
Cement and Concrete Research, Elsevier, 2011, 41 (5), pp.542-556. ⟨10.1016/j.cemconres.2011.02.003⟩
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2011.02.003
Popis: International audience; This study concerns the prediction of the elastic properties of a 3D mortar image, obtained by micro-tomography, using a combined image segmentation and numerical homogenization approach. The microstructure is obtained by segmentation of the 3D image into aggregates, voids and cement paste. Full-fields computations of the elastic response of mortar are undertaken using the Fast Fourier Transform method. Emphasis is made on highly-contrasted properties between aggregates and matrix, to anticipate needs for creep or damage computation. The Representative Volume Element, i.e. the volume size necessary to compute the effective properties with a prescribed accuracy, is given. Overall, the volumes used in this work were sufficient to estimate the effective response of mortar with a precision of 5%, 6% and 10% for contrasts ratio of 100, 1000 and 10000, respectively. Finally, a statistical and local characterization of the component of the stress field parallel to the applied loading is carried out.
Databáze: OpenAIRE
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