The effect of fibre fractures in the bridging zone of fatigue cracked Ti–6Al–4V/SiC fibre composites

Sinclair, R.; Preuss, Michael; Maire, Éric; Buffière, Jy; Bowen, P.; Withers, Philip J.

doi:10.1016/j.actamat.2003.11.024

Cited by 50 publications

(41 citation statements)

References 30 publications

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“…Few studies have reported detailed investigations of kinematic analyses using 3D pictures. As a complementary analysis, X-ray diffraction may be used to evaluate elastic strains [12]. However, the reconstructed pictures themselves may be used to evaluate displacements.…”

Section: X-ray Computed Micro Tomography (Xcmt) Is a Very Precious Tomentioning

confidence: 99%

Three-dimensional image correlation from X-ray computed tomography of solid foam

Roux

Hild

Viot

et al. 2008

Composites Part A: Applied Science and Manufacturing

273

270

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A new methodology is proposed to estimate 3D displacement fields from pairs of images obtained from X-Ray Computed Micro Tomography (XCMT). Contrary to local approaches, a global approach is followed herein that evaluates continuous displacement fields. Although any displacement basis could be considered, the procedure is specialized to finite element shape functions. The method is illustrated with Preprint submitted to Elsevier 2 February 2008the analysis of a compression test on a polypropylene solid foam (independently studied in a companion paper). A good stability of the measured displacement field is obtained for cubic element sizes ranging from 16 voxels to 6 voxels.

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Section: X-ray Computed Micro Tomography (Xcmt) Is a Very Precious Tomentioning

confidence: 99%

Three-dimensional image correlation from X-ray computed tomography of solid foam

Roux

Hild

Viot

et al. 2008

Composites Part A: Applied Science and Manufacturing

273

270

View full text Add to dashboard Cite

show abstract

“…The elastic matrix and fibre strains parallel to the loading axis (z) were subsequently measured by diffraction for the (102) Ti and (108) SiC peaks, respectively, using a procedure developed previously (Sinclair et al 2004(Sinclair et al , 2005. The 100(x) × 40(z) mm incident beam was oriented edge-on to the crack front.…”

Section: (D) Strain Mappingmentioning

confidence: 99%

Evolution of crack-bridging and crack-tip driving force during the growth of a fatigue crack in a Ti/SiC composite

et al. 2012

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High spatial resolution diffraction and imaging using synchrotron X-rays are combined to monitor the incremental growth of a fatigue crack through the matrix of a Ti-6Al-4V/SCS-6 SiC monofilament metal matrix composite. X-ray tomography is used to quantify the crack opening displacement (COD) and diffraction to measure the crack-tip stress field in each phase, the wear degraded interfacial strengths, as well as the crack face tractions applied by the bridging fibres, at maximum (K max ) and minimum (K min ) loading as a function of crack length. In this way, it has been possible to quantify the crack-tip driving force (the stress intensity range effective at the crack-tip) in three ways: from the COD, the bridging stresses and the crack-tip stress field. The fibre stresses act to prop open the crack at K min and shield the crack at K max such that the change in COD is small over the fatigue cycle. Consequently, the effective stress intensity range at the crack tip remains around 10 MPa √ m as the crack lengthens, as more and more fibres bridge the crack despite the normally applied stress intensity rising to 60 MPa √ m. The implications of the derived fracture mechanics parameters are assessed and the wider potential of X-ray diffraction and imaging for crack-tip microscopy is discussed.

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“…Reconstructed volumes give invaluable indications on the structure of metallic [5], ceramic [6,7], cementitious [8], cellular [9] materials. Damage mechanisms [10,11] and cracks [12,13] are also analyzed through direct visualization.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Artifact Correction for Volume Correlation Measurements Using Tomographic Images from a Laboratory X-ray Source

et al. 2010

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The effect of fibre fractures in the bridging zone of fatigue cracked Ti–6Al–4V/SiC fibre composites

Cited by 50 publications

References 30 publications

Three-dimensional image correlation from X-ray computed tomography of solid foam

Three-dimensional image correlation from X-ray computed tomography of solid foam

Evolution of crack-bridging and crack-tip driving force during the growth of a fatigue crack in a Ti/SiC composite

Analysis and Artifact Correction for Volume Correlation Measurements Using Tomographic Images from a Laboratory X-ray Source

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