Journal ArticleDOI
Experimental investigation of deformation and failure mechanisms in rock under indentation by digital image correlation
TLDR
In this article, the authors used the non-destructive optical technique of digital image correlation (DIC) to measure the force-penetration curve and the full-field displacements on the sandstones surfaces.About:
This article is published in Engineering Fracture Mechanics.The article was published on 2012-12-01. It has received 99 citations till now. The article focuses on the topics: Indentation & Digital image correlation.read more
Citations
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Journal ArticleDOI
Pre-Peak and Post-Peak Rock Strain Characteristics During Uniaxial Compression by 3D Digital Image Correlation
TL;DR: In this article, a non-contact optical method for strain measurement applying three-dimensional digital image correlation (3D DIC) in uniaxial compression is presented. But this method is limited to the case of sandstone.
Journal ArticleDOI
Investigating Toppling Failure Mechanism of Anti-dip Layered Slope due to Excavation by Physical Modelling
TL;DR: Based on the similarity ratio theory, a physical model was built to investigate the failure mechanism of the anti-dip layered slope under excavation in this article, where the deformation characteristics of the slope at each stage were analyzed and compared with those of the surface slopes in the field.
Journal ArticleDOI
Characterisation of mechanical behaviour of 3D printed rock-like material with digital image correlation
TL;DR: In this article, 3D printed Brazilian disc specimens with pre-existing single and double flaws were compressed under quasi-static loading to investigate the loading capacity as well as the crack initiation, propagation and coalescence mechanism of pre-flawed rock-like specimens.
Journal ArticleDOI
Digital Image Correlation Development for the Study of Materials Including Multiple Crossing Cracks
TL;DR: In this article, an improvement of the digital image correlation (DIC) procedure was proposed to solve the uncertainty problems at the vicinity of the junction of two cracks, which was used to perform an evaluation of the displacement when multiple cracks are present in the subset.
Journal ArticleDOI
Damage evolution study of sandstone by cyclic uniaxial test and digital image correlation
TL;DR: In this article, the damage evolution process and crack development of sandstone samples subjected to axially cyclic loading with different amplitudes were tested and optical images of specimen surface in loading-unloading periods are presented for digital image correlation (DIC) analysis.
References
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Journal ArticleDOI
Determination of displacements using an improved digital correlation method
TL;DR: An improved digital correlation method is presented for obtaining the full-field in-plane deformations of an object by numerically correlating a selected subset from the digitized intensity pattern of the undeformed object.
Journal ArticleDOI
Indentation fracture: principles and applications
Brian R. Lawn,Rodney Wilshaw +1 more
TL;DR: The basic principles and practical applications of indentation fracture are reviewed in this article, with a focus on the application of fracture fracture in the field of orthogonal fracture repair and alignment.
Journal ArticleDOI
Brittle Failure in Compression: Splitting, Faulting and Brittle-Ductile Transition
H. Horii,Sia Nemat-Nasser +1 more
TL;DR: In this paper, a simple two-dimensional mathematical model is proposed for the analysis of the brittle-ductile transition process, the corresponding elasticity boundary-value problem is formulated in terms of singular integral equations, the solution method is given, and numerical results are obtained and their physical implications are discussed.
Journal ArticleDOI
Digital image correlation using iterative least squares and pointwise least squares for displacement field and strain field measurements
TL;DR: In this article, a more general and practical intensity change model is employed with consideration of the linear intensity change of the deformed image, followed by an iterative least squares algorithm for calculating displacement field with sub-pixel accuracy.