Results 261 to 270 of about 186,782 (332)

Effective method for fatigue crack arrest in structural steels based on artificial creation of crack closure effect

International Journal of Fatigue, 2019
Novel method of fatigue crack growth arrest in structural steels based on artificial creation of crack closure effect is proposed. Special liquid technological environment is used which, falling into a crack cavity and interacting with crack surface ...
Ya. Khaburskyi, Z. Slobodyan, M. Hredil, H. Nykyforchyn   +3 more
semanticscholar   +1 more source

Effect of crack surface geometry on fatigue crack closure

Metallurgical and Materials Transactions A, 1995
The geometry of crack faces often plays a critical role in reducing crack extension forces when crack closure occurs during fatigue crack growth. Most previous studies of fatigue crack closure are concerned with mechanical measures of closure as related to the crack growth rate; very little attention has been given to the geometry of the crack surfaces.
W. J. Drury, Arun M. Gokhale, S. D. Antolovich   +2 more
openaire   +1 more source

Out-of-phase thermo-mechanical fatigue crack growth and the effect of the compressive minimum load level on crack closure at notches

International Journal of Fatigue, 2020
Fatigue crack growth rate in Room Temperature and Out-of-Phase Thermo-Mechanical Fatigue notched specimen experiments on the nickel-base alloy IN792 is studied.
P. Almroth, D. Gustafsson, J. L. Homs, K. Simonsson   +3 more
semanticscholar   +1 more source

THE EFFECTS OF CLOSURE OF CRACKS ON THE DYNAMICS OF A CRACKED CANTILEVER BEAM

Journal of Sound and Vibration, 2000
The paper develops a finite element scheme for computing the eigensystem for a cracked beam for different degrees of closure. Previous work in the authors' laboratories has indicated that the ability to extend the use of mode superposition to model breathing conditions in the crack zone would overcome the need to switch from a frequency-domain-based ...
M. KISA, J. BRANDON
openaire   +1 more source

Effect of compressive load and crack closure on fatigue crack growth of commercial pure titanium at negative load ratios

Engineering Fracture Mechanics, 2019
In this paper, the effect of compressive load and crack closure on mode-I fatigue crack growth (FCG) behavior at negative load ratios is studied with compact-tensile-shear (CTS) specimens made from commercial pure titanium (CP-Ti).
Chang-Yu Zhou, Jian Li, Xiao-Hua He
exaly   +2 more sources

Closure Effects on Fatigue Crack Detection

Journal of Engineering Mechanics, 1999
An experimental study of crack closure and its effects on the vibration of a simple beam shows that both frequency and damping changes due to the crack are influenced significantly, to the point of being obscured in some cases. The nonlinearity induced by crack closure is also explored.
Wuzhen Zhang, Rene B. Testa
openaire   +1 more source

Elastodynamic Problem for Two Penny-Shaped Cracks: The Effect of Cracks’ Closure

International Journal of Fracture, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Menshykov, Oleksandr V., Guz, Igor A.
openaire   +2 more sources

The effect of crack closure on the reliability of NDT predictions of crack size

NDT & E International, 1987
Abstract The aim of this work is to investigate the effect of crack closure on the reliability of NDT predictions of crack size. Tests are performed on mild steel plate specimens each possessing a fatigue crack. The amount of crack opening or closure is controlled using a specially built four-point bending rig.
R. Clark, W.D. Dover, L.J. Bond
openaire   +2 more sources

Effect of Crack Closure on Magnitude of Modulated Wave

International Journal of Structural Stability and Dynamics, 2020
Fatigue cracks generated by repeated loads cause structural failures. Such cracks grow continuously and at an increasing speed owing to the concentration of stresses near the crack tips. Therefore, the early detection of fatigue cracks is imperative in the field of structural-health monitoring for the safety of structures exposed to dynamic loading ...
Sang Eon Lee, Jung-Wuk Hong
openaire   +1 more source

Crack Closure Effects in a Cracked Cylinder Under Pressure

2008
The circumferential stress varies through the wall thickness when a cylinder is subjected to internal or external pressure. Internal pressure will induce tensile circumferential stress while external pressure compressive stress, in terms of the thick-walled cylinder theory [1].
J. Zhao, R. Liu, T. Zhang, X. J. Wu
openaire   +1 more source