Results 171 to 180 of about 2,962 (211)

Crack-size distribution in homogeneous solids

International Journal of Fracture, 1979
Thermally activated crack propagation takes place by consecutive bond breaking and occasional mending steps. This process can be represented by a differential equation that describes the crack-size distribution as a function of time for single-step processes.
openaire   +1 more source

Effect of crack size on acoustic emission

The Journal of the Acoustical Society of America, 1975
Acoustic emissions from the vicinities of cracks were monitored by a multichannel acoustic emission system, The experiment was performed on a flawed carbon steel vessel under hydraulic pressure providing a nearly uniform external stress in the vessel wall, However, the stress fields near the cracks were nonuniform.
openaire   +1 more source

Effects of the ratio of flaw size to specimen size on cracking behavior

Bulletin of Engineering Geology and the Environment, 2014
To investigate the size effects on the cracking behavior of flaw-containing specimens under compressive loading, rectangular parallelepiped specimens containing a single centrally located flaw are numerically loaded using the bonded-particle model (BPM).
Wong, Louis Ngai Yuen, Wang, Sijing, Zhang, Xiao Ping   +2 more
openaire   +3 more sources

Electrochemical Crack Size Effect in Stress Corrosion Cracking and Corrosion Fatigue

CORROSION 2017, 2017
Abstract The growth rate of small and long stress corrosion and corrosion fatigue cracks in 12Cr steam turbine blade steels in low conductivity water containing 35 ppm Cl- (simulating upset steam condensate chemistry) showed a significant dependence on crack size for the same mechanical driving force.
A. Turnbull, S. Zhou
openaire   +1 more source

Evaluation of the critical sizes of surface cracks

Materials Science, 2006
On the basis of known expressions for the stress-intensity factors, we propose a graph-analytic method for the evaluation of the critical sizes (depth and length) of a surface semielliptic crack for a plate either in tension or in bending.
openaire   +1 more source

Crack size independence of the crack driving force in the buckled plate specimen

Journal of Materials Science, 1989
A new fracture mechanics specimen, the buckled plate specimen, has been developed with the attractive property that the crack driving force is independent of crack size during constant deflection tests. The mechanics analysis and results of lgepal assisted slow crack growth in polyethylene are presented as verification.
P. Chang, J. A. Donovan
openaire   +1 more source

Effects of Grain Size on Crack Tip Mechanical Fields of Intergranular Cracking

Advanced Materials Research, 2014
Intergranular stress corrosion cracking is one of important failure form of structural materials in nuclear power plants, and the initiation and development of crack at grain boundary are affected by the grain size of materials. The macroscopic model and mesoscopic model of crack propagation was established by using finite element method, and the ...
Wei Bing Wang, He Xue, Fu Qiang Yang, Kun Liu   +3 more
openaire   +1 more source

Length and depth resonances of surface cracks and their use for crack size estimation

Applied Physics Letters, 1978
Angular scattering from surface cracks has been used for determining the length of a surface crack. This technique assumes the physical availability of space to carry out an angular scattering experiment, and makes no estimation of the depth of the crack.
V. Domarkas, B. T. Khuri-Yakub, G. S. Kino   +2 more
openaire   +1 more source

Critical crack size in the fracture of metals

Technical Physics, 2007
A physical approach developed by I.I. Novikov is applied for estimating and predicting critical crack lengths in metals. Experimental data obtained for single crystals are considered. The necessity of taking into account the critical crack lengths in J integrals is demonstrated.
openaire   +1 more source

Effect of crack size on fatigue life

2003
NDT evaluation of a steel plate shows that there are cracks present of 3 mm which grew by fatigue to a final crack length under service conditions of 8 mm, determined by fast fracture. Calculate the percentage increase in fatigue life for the plate: (a) if the final crack length is extended by 2 mm to 10 mm through the use of a material of ...
A. Afagh, Y.-W. Mai
openaire   +1 more source