Results 231 to 240 of about 3,449,586 (285)
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Structural hierarchy defeats alloy cracking
Science, 2021Internal herringbone structures in a ductile multicomponent alloy enable crack ...
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Cracks and Crack Control in Concrete Structures
PCI Journal, 1988T he material presented in this paper is based on more than 30 years of research, observations and experience concerning causes, control, and consequences of cracking in concrete structures. This extensive background was helpful in the preparation of this paper which deals with questions of concrete cracking.
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A Method for Crack Detection on a Concrete Structure
18th International Conference on Pattern Recognition (ICPR'06), 2006Recently, interest in automatic crack detection on concrete structure images for non-destructive inspection has been increasing. In general, there are various noises such as irregularly illuminated conditions, shading, blemishes and divots in the concrete images. These lead to difficulties for automatic crack detection.
Yusuke Fujita +2 more
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Crack propagation in anisotropic composite structures
Asymptotic Analysis, 2014A crack approaching a material interface between two elastic materials may stop or may advance by either penetrating the interface or deflecting into the interface (cf. N.Y. He and J.W. Hutchinson, Int. J. Solids Struct. 25 (1989), 1053–1067). Mathematical models for crack path prediction are based on the asymptotic behavior near the crack tip. In this
Sergey A. Nazarov +2 more
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Vibration of Elastic Structures With Cracks
Journal of Applied Mechanics, 1993An analytical algorithm is proposed to represent eigensolutions [λm2, ψm(r)]m=1∞ of an imperfect structure C containing cracks in terms of crack configuration σc and eigensolutions [ωn2, φn(r)]n=1∞ of a perfect structured without P the cracks. To illustrate this algorithm on mechanical systems governed by the two-dimensional Helmholtz operator, the ...
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Structural features of crack formation during corrosion cracking
Russian Journal of Nondestructive Testing, 2007Stress corrosion cracking (SCC) causes damage to main gas pipelines due to formation and development of cracks on the outer surface of a tube. Prevention of SCC crack development and fracture of a gas pipeline is an important problem of diagnostics that can be solved in various ways.
Yu. P. Surkov +5 more
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Cracks and Structural Redundancy
Marine Technology and SNAME News, 1996This paper proposes a way to use finite element models to determine the effect of fatigue cracks in ship structures. Cracks of different lengths are modeled and the maximum nodal stress at the crack tip is used to estimate the stress intensity level. The calculated stress intensity factor is substituted into fracture mechanics equations to calculate ...
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Effect of structural geometry and crack location on crack driving forces for cracks in welds
Engineering Fracture Mechanics, 2007Abstract This paper quantifies the effect of geometry (planar or cylindrical) and crack location (internal or edge cracks; weld center or interface cracks) on crack driving force for welded joints, via systematic elastic–creep and elastic–plastic finite element (FE) analyses for welded joints.
Chang-Kyun Oh +4 more
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Proceedings of the Institution of Civil Engineers - Forensic Engineering, 2011
Under overload, the mode of failure in any steel structure should ideally be ductile not brittle; the possibility of cracking in steelwork should thus be actively guarded against. Historically, steel cracking has caused some spectacular failures. Steel can fracture rapidly at low temperature and can crack during welding, in fatigue or as a result of ...
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Under overload, the mode of failure in any steel structure should ideally be ductile not brittle; the possibility of cracking in steelwork should thus be actively guarded against. Historically, steel cracking has caused some spectacular failures. Steel can fracture rapidly at low temperature and can crack during welding, in fatigue or as a result of ...
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Dynamic Crack Propagation in Composite Structures
2010Dynamic propagation phenomena of interfacial cracks in composite laminated structures are investigated. The structural modeling is developed by means of a finite element formulation based on a plane stress behavior, whereas the crack growth is predicted by a Fracture Mechanics approach.
BRUNO, Domenico +2 more
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