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A new digital surface crack image monitoring technology for coal failure
Energy Science & Engineering, 2023 The experimental study on the variation law of coal fracture and stress was carried out in the laboratory and engineering fields, respectively. A multiparameter monitoring system including electromagnetic radiation and a high‐speed camera was built, and ...
Yankui Li +6 more
doaj +1 more source
A fatigue crack initiation model incorporating discrete dislocation plasticity and surface roughness [PDF]
, 2007 Although a thorough understanding of fatigue crack initiation is lacking, experiments have shown that the evolution of distinct dislocation distributions and surface roughness are key ingredients.
Brinckmann, Steffen +1 more
core +4 more sources
Acoustic microscopy of surface cracks
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1986 The uniqueness of the acoustic microscope lies in its ability to image the way in which acoustic waves interact with the elastic properties of a specimen with microscopic resolution. A dominant role in the contrast achieved is played by Rayleigh waves that are excited in the surface of the specimen.
Rowe, J +3 more
openaire +2 more sources
FINITE ELEMENT ANALYSIS OF FRACTURE MECHANICS OF WHEEL-RAIL [PDF]
مجله مدل سازی در مهندسی, 2011 In this paper, wheel-rail contact problem in the presence of rail surface crack is investigated. The reason for investigating this problem is significant effect of wheel-rail contact on stress intensity factors.
یوسف Ahmadi Broughani +1 more
doaj +1 more source
AIP Advances, 2018 An elastic-plastic analysis of the mode III crack surface vicinity was performed in an infinitely wide elastic-perfectly plastic plate, in which a pair of anti-plane forces applied at an arbitrary point on the crack surface.
Feng Huang +7 more
doaj +1 more source
High-Speed and Low-Load Twin-Roll Casting of Al–5%Mg Strip
Metals, 2022 A conventional twin-roll caster usually casts strips at a speed slower than 2 m/min and a roll load greater than 2 kN/mm. A vertical-type high-speed twin-roll caster can cast aluminum alloy strips at a speed higher than 10 m/min and a roll load smaller ...
Kazuki Yamazaki, Toshio Haga
doaj +1 more source
Crack closure effect of fatigue crack under cyclic tensile loading
Nihon Kikai Gakkai ronbunshu, 2015 The objective of this study is to evaluate crack growth behavior under cyclic tensile loading considering crack closure effect. Crack growth behavior under cyclic tensile loading on a plate with surface crack is tested.
Akiyuki TAKAHASHI +3 more
doaj +1 more source
Crack path in aeronautical titanium alloy under ultrasonic torsion loading [PDF]
Fracture and Structural Integrity, 2016 This paper discusses features of fatigue crack initiation and growth in aeronautical VT3-1 titanium alloy under pure torsion loading in gigacycle regime. Two materials: extruded and forged VT3-1 titanium alloys were studied.
A. Nikitin +3 more
doaj +1 more source
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A, 2001 In this paper, the effect of crack size, number and distance between the centers of surface cracks on the fatigue behavior of alumina has been investigated. A single crack and two or three collinear surface cracks were introduced by Vickers indenter. The crack size was changed by several indentation load. The fatigue tests were carried out under static
Akira YOSHIKAWA +3 more
openaire +2 more sources
Roughness of fracture surfaces [PDF]
, 2000 We study the fracture surface of three dimensional samples through a model for quasi-static fractures known as Born Model. We find for the roughness exponent a value of 0.5 expected for ``small length scales'' in microfracturing experiments.
A Parisi +11 more
core +3 more sources