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In situ X-ray tomography characterisation of 3D deformation of C/C-SiC composites loaded under tension

Chen, Yang and Shi, Yuan and CHATEAU, Camille and Marrow, James (2021) In situ X-ray tomography characterisation of 3D deformation of C/C-SiC composites loaded under tension. Composites Part A Applied Science and Manufacturing, 145. Elsevier. doi: 10.1016/j.compositesa.2021.106390. ISSN 1359-835X.

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C/C-SiC composites fabricated through Liquid Silicon Infiltration were tested under monotonic tension with in situ X-ray computed tomography. The specimens had different fibre orientations with respect to the tensile direction, 0°/90° and ±45°, such that the tension accounted for in-axis and off-axis loads, respectively. The 3D XCT images provided explicit visualisations and quantitative measurements of the distributions of SiC-Si and the orientations of the C fibre bundles. The full-field displacement and strain fields were measured by Digital Volume Correlation, observing a difference in the local deformations in response to the in-axis and off-axis loading. In both specimens, the tensile load triggered significant strain localisations at low stress (<50 MPa). Strong local deformations, observed at both low and high applied stresses, were mostly in the through-thickness direction, indicating local delamination. These observations show the importance of residual stresses to damage development in C/C-SiC composites.

Item URL in elib:https://elib.dlr.de/141595/
Document Type:Article
Title:In situ X-ray tomography characterisation of 3D deformation of C/C-SiC composites loaded under tension
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Chen, Yangyang.chen (at) materials.ox.ac.ukUNSPECIFIED
Shi, Yuanyuan.shi (at) dlr.dehttps://orcid.org/0000-0002-4210-9069
CHATEAU, Camillecamille.chateau (at) enpc.frhttps://orcid.org/0000-0002-7140-530X
Marrow, Jamesjames.marrow (at) materials.ox.ac.ukhttps://orcid.org/0000-0001-6120-9826
Journal or Publication Title:Composites Part A Applied Science and Manufacturing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.compositesa.2021.106390
Keywords:Ceramic-matrix composites (CMCs); Mechanical properties; Micro-mechanics; CT analysis
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Shi, Dr.-Ing. Yuan
Deposited On:06 Apr 2021 10:08
Last Modified:06 Apr 2021 10:08

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