Full‐field strain mapping by optical correlation of micrographs acquired during deformation

Fonseca, Jairo; Mummery, Paul; Withers, Philip J.

doi:10.1111/j.1365-2818.2005.01461.x

Cited by 141 publications

(80 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3a), and a multi-pass approach that uses the displacement gradient information from the previous passes to deform the sub-volumes on the subsequent passes [44]. In the present case, final sub-volumes of 32 × 32 × 32 voxels 3 overlapped by 50% were reached after successive passes using sub-volumes of 96 × 96 × 96 voxels 3 and 64 × 64 × 64 voxels 3 .…”

Section: Local Correlation Algorithmmentioning

confidence: 79%

Computation of full-field displacements in a scaffold implant using digital volume correlation and finite element analysis

Madi

Tozzi

Zhang

et al. 2013

Medical Engineering & Physics

View full text Add to dashboard Cite

Measurements of three-dimensional displacements in a scaffold implant under uniaxial compression have been obtained by two Digital Volume Correlation (DVC) methods, and compared with those obtained from micro-finite element models. The DVC methods were based on two approaches, a local approach which registers independent small volumes and yields discontinuous displacement fields; and a global approach where the registration is performed on the whole volume of interest, leading to continuous displacement fields. A customised mini-compression device was used to perform in situ step-wise compression of the scaffold within a micro-computed tomography (µCT) chamber, and the data were collected at steps of interest. Displacement uncertainties, ranging from 0.006 to 0.02 voxel (i.e.0.12 to 0.4 μm), with a strain uncertainty between 60 and 600 με, were obtained with a spatial resolution of 32 voxels using both approaches, although the global approach has lower systematic errors. Reduced displacement and strain uncertainties may be obtained using the global approach by increasing the element size; and using the local approach by increasing the number of intermediary sub-volumes. Good agreements between the results from the DVC measurements and the FE simulations were obtained in the primary loading direction as well as in the lateral directions. This study demonstrates that volumetric strain measurements can be obtained successfully using DVC, which may be a useful tool to investigate mechanical behaviour of porous implants.

show abstract

Section: Local Correlation Algorithmmentioning

confidence: 79%

Computation of full-field displacements in a scaffold implant using digital volume correlation and finite element analysis

Madi

Tozzi

Zhang

et al. 2013

Medical Engineering & Physics

View full text Add to dashboard Cite

show abstract

“…The slightly oblique view of the sample was corrected for before the analysis of the data. Commercial DIC analysis software (La Vision GmbH, Gottingen, Germany) [27] was used to analyse the results and details of the approach are provided in [28]. For all images the correlation was done by using the state at K min prior to OL as the reference image.…”

Section: Methodsmentioning

confidence: 99%

Characterisation of overloads in fatigue by 2D strain mapping at the surface and in the bulk

López-Crespo

Mostafavi

Steuwer

et al. 2016

Fatigue Fract Eng Mat Struct

Self Cite

View full text Add to dashboard Cite

show abstract

“…Different surface decoration techniques have been found in literature depending on the studied surface area and the homogeneity of the decoration (pattern) [11]. Deposition of yttria-stabilizedzirconia (YSZ) nanoparticles is a good method because it can be applied rapidly on large surface areas [9].…”

Section: Description Of the Studymentioning

confidence: 99%

Statistical analysis of SEM image noise

Мансилла¹,

Ocelík²,

Hosson³

2013

Surface Effects and Contact Mechanics XI

View full text Add to dashboard Cite

The stress-relaxation technique is one of the most popular approaches to measure macroscopic residual stresses in different kinds of materials. Recently, by using a dual beam microscope (Scanning Electron Microscope (SEM) and Focused Ion Beam (FIB) in one chamber), a new option of detection of internal stresses on a microscopic scale appeared. FIB is used to release local strain induced by internal stresses and Digital Image Correlation (DIC) of SEM images collected before and after stress release is applied to quantify strain release at the surface.However, the combination of DIC and SEM brings some new important aspects in the analysis of noise generated by the special way of building an SEM image. Because the magnitude of the strain is quite often very close to the noise level, it is very important to test each SEM column which is used in these measurements. It is necessary to study conditions for minimization and randomization of the noise generated during SEM image collection by instabilities inside electron column and sample chamber as well. In the present work, the methods for such testing will be given for a Philips XL30 ESEM.

show abstract

Full‐field strain mapping by optical correlation of micrographs acquired during deformation

Cited by 141 publications

References 14 publications

Computation of full-field displacements in a scaffold implant using digital volume correlation and finite element analysis

Computation of full-field displacements in a scaffold implant using digital volume correlation and finite element analysis

Characterisation of overloads in fatigue by 2D strain mapping at the surface and in the bulk

Statistical analysis of SEM image noise

Contact Info

Product

Resources

About