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Development of a Crack Type Index
Transportation Research Record: Journal of the Transportation Research Board, 2005Many automated systems for crack analysis have been developed to measure the extent and severity of pavement cracking objectively. However, the accuracy of such an automated crack analysis system has not been satisfactory. This paper presents a crack type index (CTI) that can be easily adopted to determine the crack type objectively as longitudinal ...
Hosin (David) Lee, Jungyong (Joe) Kim
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Tension Crack Development in Soils
Journal of Geotechnical Engineering, 1988A model is proposed for finite‐element modeling of tension crack propagation in soils. The essential features of this model are the splitting of a single node into two distinct nodes in the wake of an advancing crack tip to replicate separation of material on either side of the crack, and the use of a fracture mechanics criterion to predict crack ...
Lee, Fook-Hou +2 more
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Developments in the analysis of interacting cracks
Engineering Failure Analysis, 1995Abstract This paper presents an overview of the finite element alternating technique for the analysis of interacting cracks. To illustrate the ease and accuracy of this method the technique is used to analyse several problems associated with both widespread fatigue and multi-site damage, a problem which is attracting worldwide attention.
R. Jones +3 more
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One Energy Condition for the Development of an Isolated Crack
Doklady Physics, 2023Based on the energy approach to the brittle fracture process, a new energy criterion of fracture is obtained in the case when an arbitrary normal symmetrical load acts on the surface of an isolated crack.
V. I. Dunaev +2 more
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Development of Roughness in Crack Propagation
Europhysics Letters (EPL), 1994We report on the statistical analysis of experimental measurements of the crack roughness for a fracture initiated from a straight notch in a granite sample. The crack surface is shown to develop a self-affine character over a correlation length ξ which depends on the distance to the notch y as a power law ξ ∝ yα characterized by a dynamic exponent 1/α
J Schmittbuhl, S Roux, Y Berthaud
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Development of a Composite Specimen Interface Cracking (CSIC) Test for Top-Down Cracking [PDF]
Journal of Testing and Evaluation, 2013 Abstract Pavement top-down cracking performance not only depends on pavement layer material characteristics, but also on layer interface conditions. Interface conditions involve both the shear resistance along the interface and the cracking resistance across the interface provided by the interface bonding agents.
Chen, Yu +3 more
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Autovibrational development of laser cracks
Polymer Mechanics, 1975The authors experimentally investigate the discontinuous ("jumping") character of the development of laser cracks in polymethyl methacrylate. The discontinuities arise in such an order that the crack remains rounded, even if the laser beam is rectangular in cross section. The authors estimate the pressure drop in the crack during a "jump."
O. E. Marin +2 more
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On the critical stress of crack development
Strength of Materials, 19741. The critical stress of crack development for round testpieces depends not only on the length of the crack but also on the stress at which it was formed. Analogous results have been obtained when testing flat testpieces. 2. The relationship between the critical stress of crack development and its length for round testpieces has the ...
V. M. Vigdorchik, G. A. Chekurova
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Development of a surface-cracked specimen
Theoretical and Applied Fracture Mechanics, 1994Abstract A surface-cracked specimen has been developed that features a web which facilitates fatigue precracking. In addition, when the web is removed, the remaining semi-elliptical surface crack forms a “natural” intersection with the free surface.
L.A. James, W.K. Wilson
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Creep–fatigue crack development from short crack starters
Materials at High Temperatures, 2014A series of isothermal strain controlled creep–fatigue tests on fully instrumented cylindrical specimens with shallow chordal crack starters has been conducted for an advanced 9%Cr turbine rotor steel at 600 and 625°C. Cyclic/hold wave shapes involving a dwell period at peak strain in tension or compression were also performed with crack development ...
Yan, W.-T. +3 more
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