Results 261 to 270 of about 363,241 (312)

Fatigue crack retrofitting by closing crack surface

International Journal of Fatigue, 2019
Abstract This paper mainly focuses on the mechanism of fatigue crack retrofitting by closing crack surface, which has proved to be effective in numerous experiments. The process of crack-closure treatment was simulated by using finite-element approach, and its effect on the crack propagation behavior was discussed in detail.
Zhiyuan YuanZhou, Bohai Ji, Zhongqiu Fu, Shigenobu Kainuma, Shigeaki Tsukamoto   +4 more
openaire   +1 more source

Surface cracks in transformation toughening ceramics

International Journal of Solids and Structures, 1994
Abstract This paper presents a complete R -curve analysis for a single surface crack and an array of equally spaced parallel surface cracks in transformation toughened ceramics (TTC). The problem is reduced to the solution of a pair of singular integral equations in which the dislocation density function and the transformation zone boundary are the ...
Andreasen, Jens Henrik, Karihaloo, B. L.
openaire   +2 more sources

All-crack remanufacturability evaluation for blade with surface crack

Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2021
Remanufacturing repair has been applied as a promising technology to extend the fatigue life of damaged components. For the compressor blade with shallow surface crack, crack can be directly repaired by crack arrest and healing technology. However, for the blade with macrosurface crack, a surface notch will be generated by crack grinding process and ...
Mingchao Ding, Yuanliang Zhang
openaire   +1 more source

Ultrasonic sizing of short surface cracks

Ultrasonics, 2007
This paper presents a method for ultrasonic sizing of surface cracks based on time domain and frequency domain Rayleigh wave near-field analysis. The procedure allows for the entire range of ratio of crack depth to Rayleigh wavelength a/lambda to be covered with one single measurement. In the time domain the time-of-flight method was extended to cracks
Bernard, Masserey, Edoardo, Mazza
openaire   +2 more sources

Interacting multiple cracks with complicated crack surface conditions

International Journal of Fracture, 1996
In solving multiple cracks problems for the strong crack interactions, crack surfaces that are not always open even under remote tension loading, some crack surfaces may contact or even partially contact.
Han Xueli, Wang Tzuchiang
openaire   +1 more source

Fatigue crack growth of semi-elliptical surface cracks

International Journal of Fatigue, 1990
Abstract An experimental and theoretical investigation of surface crack growth in 28 mm thick steel plates loaded in pure bending was carried out. The experimental work involved testing plates with initial semi-elliptical surface flaws with aspect ratios of a/c = 0.1, 0.25, 0.5 and 1.0. Crack growth and crack shape development were monitored using AC
N MCFADYEN, R BELL, O VOSIKOVSKY
openaire   +1 more source

Crack propagation in solids and crack-surface roughness

Physica A: Statistical Mechanics and its Applications, 1999
It is seen from extensive computer simulation results and some experimental observations that for inhomogenous solids with moving cracks, the surface roughness exponent $\xi$ crosses over from a low value $\xi \sim 0.42$ to a higher value $\xi \sim 0.8$, as the crack-tip velocity increases above a certain threshold.
Chakrabarti, Buddhapriya, Chakrabarti, Bikas K   +1 more
openaire   +1 more source

Fatigue Crack Growth Analysis of Semielliptical Surface Crack

Applied Mechanics and Materials, 2013
The aim of this paper is to present the simulation technique and experimental work for surface crack in a structure. For the sake of test apparatuss feasibility, a semielliptical surface crack in a structure was converted into small specimen size.
M.R.M. Akramin, Ahmad Kamal Ariffin, Masanori Kikuchi, S. Abdullah, N. Nik Abdullah   +4 more
openaire   +1 more source

Surface thermodynamics of cracks

Surface Science Reports, 2012
Abstract Although a crack is a typical detail of a real solid, the theory of cracks in surface science was reduced to studying flat-parallel slits for a long time. The last decade has brought a number of new results related to the thermodynamic and surface science fundamentals of wedge-shaped cracks including the crack line tension.
openaire   +1 more source

Crack growth rate of an inclined surface crack

Engineering Fracture Mechanics, 1992
Investigation of surface crack growth in 16MnR steel specimens with crack inclination angle β = 0°, 30° and 45° and under the condition of biaxial loading ratio Px:Py = 0, 0.5 and 1 is reported in this paper. A formula of the stress intensity factor for surface cracked cruciform specimens loaded biaxially is calibrated using the finite element method ...
Zeng Zhaojing, Dai Shuho
openaire   +1 more source