Evaluation of Crack Opening Displacement for Compact Tension Specimen

Crack opening profile in DCDC specimen

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 exp...

Calculation of the Electrical Resistance of a Compact Tension Specimen for Crack-Propagation Measurements

The electrical resistance of a notched compact specimen for determination of plane-strain fracture toughness was calculated using numerical methods coupled with the Schwarz-Christoffel transformation. Experimental measurement of this resistance is commonly used to obtain the crack length in notched specimens subjected to stress corrosion and hydrogen embrit t lement tests. The results presented...

Displacement Discontinuity Analysis of the Effects of Various Hydraulic Fracturing Parameters on the Crack Opening Displacement (COD)

    The combination of horizontal drilling along with hydraulic fracturing has significantly improved the production of hydrocarbon reservoirs and made it possible to extract the relatively impermeable and uneconomical reservoirs. The production rate of oil and gas wells increases proportional to hydraulic fracture aperture or crack opening displacement (COD). This is an important parameter i...

Numerical Investigation on Stable Crack Growth in Plane Stress

Large deformation finite element analysis has been carried out to investigate the stress-strain fields ahead of a growing crack for compact tension (a/W=0.5) and three-point bend (a/W=0.1 and 0.5) specimens under plane stress condition. The crack growth is controlled by the experimental J-integral resistance curves measured by Sun et al. The results indicate that the distributions of opening st...

δ25 Crack opening displacement parameter in cohesive zone models: experiments and simulations in asphalt concrete