Crack opening profile in DCDC specimen
Gael Pallares (LCVN, SPCSI), Laurent Ponson (EAS), Antoine Grimaldi, (LCVN), Matthieu George (LCVN), Guillaume Pr\'evot (LCVN), Matteo Ciccotti, (LCVN)
TL;DR
This paper investigates the crack opening profile in DCDC specimens for brittle materials using simulations and experiments, providing a simple expression to describe crack shape for real-time measurement of key parameters.
Contribution
It introduces a simple analytical expression for the crack profile in DCDC specimens, validated by simulations and experiments, enabling accurate real-time measurements.
Findings
The crack shape can be described by a simple expression.
Finite Element simulations align with experimental interferometry data.
The method allows real-time measurement of crack length and stress intensity.
Abstract
The opening profile of the cracks produced in the Double Cleavage Drilled Compression (DCDC) specimens for brittle materials is investigated. The study is achieved by combining Finite Element simulations of a DCDC linear elastic medium with experimental measurements by crack opening interferometry on pure silica glass samples. We show that the shape of the crack can be described by a simple expression as a function of the geometrical parameters of the sample and the external loading conditions. This result can be used to measure accurately in real time relevant quantities during DCDC experiments, such as the crack length or the stress intensity factor applied to the specimen.
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Taxonomy
TopicsUltrasonics and Acoustic Wave Propagation · Geophysical Methods and Applications · Rock Mechanics and Modeling