Results 231 to 240 of about 9,231,355 (310)

Microscopic measurement of the local deformation field establishes the mechanistic origin of the fatigue threshold for soft brittle materials.

Soft Matter
Altuntas U, Li C, Kolinski JM.
europepmc   +1 more source

Automated low-cost framework for crack measurements in RC structures using deep learning approach. [PDF]

Sci Rep
Hassouna M, Marzouk M, Fathalla E.
europepmc   +1 more source

A multi-scale transformer-enhanced YOLO framework for unified road damage detection and boundary-aware segmentation. [PDF]

Front Artif Intell
Kulambayev B, Olzhayev O, Suliman A.
europepmc   +1 more source

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Influence of grain size on the small fatigue crack initiation and propagation behaviors of a nickel-based superalloy at 650 °C

Journal of Materials Science and Technology, 2019
GH4169 at 650 °C in atmosphere was investigated by using single edge notch tensile specimens. The number of main cracks and crack initiation mechanisms at the notch surface strongly depended on the grain size. The crack initiation life accounted for more
Yun-Fei Jia, Shan-Tung Tu, Xiancheng Zhang   +2 more
exaly   +2 more sources

In-situ SEM investigation and modeling of small crack growth behavior of additively manufactured titanium alloy

, 2021
The fatigue crack growth of wire and arc additive manufactured Ti-6Al-4V alloys is investigated using in-situ SEM fatigue testing. The small crack initiation and propagation behaviors within grains and across grains are systematically studied, and the ...
Xinyan Wang, Yang Zhao, Luobin Wang, Limin Wei, Jingjing He, Xuefei Guan   +5 more
semanticscholar   +1 more source

Crack growth of physically small cracks

International Journal of Fatigue, 2007
This paper shows how, for physically small cracks, the unified crack growth model, also referred to as Unigrow, can be related to the generalized Frost and Dugdale crack growth model. We also show how this formulation can be used to predict the crack growth history of a range of experimental tests.
R JONES, L MOLENT, S PITT
openaire   +1 more source

Fatigue crack nucleation and microstructurally small crack growth mechanisms in high strength aluminum alloys

, 2020
Characterization of microstructurally small fatigue crack growth behavior for two aluminum alloys, AA7065 and AA2099, were quantified using a surface replication process for the first time. In addition, scanning electron microscopy analysis revealed that
C. Cauthen, K. V. Anderson, D. Avery, Andrew H. Baker, C. Williamson, S. Daniewicz, J. Jordon   +6 more
semanticscholar   +1 more source

Small Cracks and the Transition to Long Cracks

MRS Bulletin, 1989
The propagation of small fatigue cracks differs considerably from that of long cracks in the same material. Small cracks tend to grow more rapidly than would be expected from long-crack data. Following Suresh and Ritchie, cracks are small when (1) their length is small compared to the scale of local plasticity (a linear elastic fracture mechanics, LEFM,
W.L. Morris, M.R. James
openaire   +1 more source

Small scatter elements for crack detection

2015 9th International Conference on Sensing Technology (ICST), 2015
This paper looks at the feasibility of using short elements radar scatters elements within concrete as a marker to cracking. It is shown that the dynamic range of power returns due to broken scatterers (indicating cracks) is small, but nevertheless consistent putting such techniques near the limits of feasibility when taken in a statistical context.
Ian G. Platt, Ian Woodhead, Michael Hagedorn   +2 more
openaire   +1 more source

Estimating the statistical properties of crack growth for small cracks

Engineering Fracture Mechanics, 1983
Abstract A series of statistical studies were conducted on two sets of fatigue crack growth data which were generated under variable amplitude loading from cracks that initiated in 7475-T7351 Aluminum down in the bore of typical aircraft quality prepared holes.
P.W. Hovey, J.P. Gallagher, A.P. Berens
openaire   +1 more source