Journal ArticleDOI
Compliance calibration of the short rod chevron-notch specimen for fracture toughness testing of brittle materials
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In this article, the short rod chevron-notch specimen has been calibrated by means of compliance measurements converted into dimensionless stress intensity factor coefficients, which are then used to calculate KIc from the maximum test load.Abstract:
The short rod chevron-notch specimen has the advantages of (1) crack development at the chevron tip during the early stage of test loading and (2) convenient calculation of KIc from the maximum test load and a calibration factor which depends only on the specimen geometry and manner of loading. For generalized application, calibration of the specimen over a range of specimen proportions and chevron-notch configurations is necessary. Such was the objective of this investigation, wherein calibration of the short rod specimen was made by means of experimental compliance measurements converted into dimensionless stress intensity factor coefficients.read more
Citations
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Journal ArticleDOI
A comparative evaluation of rock strength measures
K.L. Gunsallus,F.H. Kulhawy +1 more
TL;DR: In this paper, the variation in strength was investigated for eight lithologically similar, Silurian sedimentary rock units from the northeastern United States, including the fracture toughness, uniaxial compression, point load index and Brazil tensile tests.
Journal ArticleDOI
Fracture toughness anisotropy in shale
TL;DR: In this paper, the authors used a modified Short-Rod methodology to measure fracture toughness in Mancos shale and found that the fracture should deviate towards the plane with lowest toughness regardless of the loading conditions.
Proceedings ArticleDOI
Fracability Evaluation in Shale Reservoirs - An Integrated Petrophysics and Geomechanics Approach
References
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Book ChapterDOI
Plane strain crack toughness testing of high strength metallic materials.
William F. Brown,John E. Srawley +1 more
Journal ArticleDOI
A simplified method for measuring plane strain fracture toughness
TL;DR: In this paper, a fracture toughness measuring concept is presented which is based on the use of specimen configurations for which the initial crack growth is stable under controlled force (soft machine) conditions.
Journal ArticleDOI
Compliance and stress intensity coefficients for short bar specimens with chevron notches
TL;DR: In this paper, a short bar specimen with rectangular cross section and chevron notch was used for fracture toughness determination, and an analytical expression was obtained for the fracture toughness Kic−Pmax relation under the assumption that the change of the compliance with crack length for the specimen with a Chevron Notch is the same as for a straight-through crack.