Investigation and countermeasures for fatigue cracks that emerged on the finger joint of the cable-stayed bridge

2015 ◽  
pp. 801-808
Keyword(s):  
Fatigue Cracks ◽  
Finger Joint ◽  
Cable Stayed Bridge

Analysis on acoustic signal characteristics of the fatigue cracks in anchor structure of cable-stayed bridge tower

2012 ◽  
Vol 48 (12) ◽  
pp. 718-730
Author(s):  
Sun Guohao ◽  
Wang Zhengxing ◽  
Kong Delian ◽  
Bai Mingqing ◽  
Zhou Yang ◽  
...  
Keyword(s):  
Acoustic Signal ◽  
Fatigue Cracks ◽  
Cable Stayed Bridge ◽  
Signal Characteristics ◽  
Anchor Structure ◽  
Bridge Tower

Formation of Persistent Slip Band in Fatigued Copper Single Crystals

1982 ◽  
Vol 40 ◽  
pp. 470-471
Author(s):  
N. Y. Jin
Keyword(s):  
Volume Fraction ◽  
Fatigue Cracks ◽  
Wall Structure ◽  
Matrix Structure ◽  
Dislocation Dipole ◽  
Slip Bands ◽  
Persistent Slip Bands ◽  
The Matrix ◽  
Hard Shell ◽  
Copper Single Crystals

Localised plastic deformation in Persistent Slip Bands(PSBs) is a characteristic feature of fatigue in many materials. The dislocation structure in the PSBs contains regularly spaced dislocation dipole walls occupying a volume fraction of around 10%. The remainder of the specimen, the inactive "matrix", contains dislocation veins at a volume fraction of 50% or more. Walls and veins are both separated by regions in which the dislocation density is lower by some orders of magnitude. Since the PSBs offer favorable sites for the initiation of fatigue cracks, the formation of the PSB wall structure is of great interest. Winter has proposed that PSBs form as the result of a transformation of the matrix structure to a regular wall structure, and that the instability occurs among the broad dipoles near the center of a vein rather than in the hard shell surounding the vein as argued by Kulmann-Wilsdorf.

The Effect of Secondary Metalworking Processes on Susceptibility of Aircraft to Catastrophic Failures and Prevention Methods

2013 ◽  
Vol 58 (4) ◽  
pp. 1207-1212
Author(s):  
E.S. Dzidowski
Keyword(s):  
Dynamic Recovery ◽  
Fatigue Cracks ◽  
Shear Bands ◽  
Adiabatic Shear ◽  
Deformation Mechanisms ◽  
Processing Maps ◽  
Adiabatic Shear Bands ◽  
Flow Localization ◽  
Catastrophic Failures ◽  
Prevention Methods

Abstract The causes of plane crashes, stemming from the subcritical growth of fatigue cracks, are examined. It is found that the crashes occurred mainly because of the negligence of the defects arising in the course of secondary metalworking processes. It is shown that it is possible to prevent such damage, i.e. voids, wedge cracks, grain boundary cracks, adiabatic shear bands and flow localization, through the use of processing maps indicating the ranges in which the above defects arise and the ranges in which safe deformation mechanisms, such as deformation in dynamic recrystallization conditions, superplasticity, globularization and dynamic recovery, occur. Thanks to the use of such maps the processes can be optimized by selecting proper deformation rates and forming temperatures.

Design of the Stonecutters Cable-Stayed Bridge in Hong Kong

2002 ◽  
Vol 86 (16) ◽  
pp. 9-14
Author(s):  
Naeem Hussain ◽  
Lars Hauge ◽  
Klaus Falbe-Hansen ◽  
Alex S. K. Kong
Keyword(s):  
Hong Kong ◽  
Cable Stayed Bridge

Yiling Multi-span Cable-Stayed Bridge over the Yangtze River

2004 ◽  
Vol 88 (8) ◽  
pp. 59-64
Author(s):  
Changyu Shao ◽  
Qinger Deng
Keyword(s):  
Yangtze River ◽  
The Yangtze River ◽  
Cable Stayed Bridge

Cable Tension Control of Cable-Stayed Bridge Using Fuzzy Satisfaction Method and Genetic Algorithm

2001 ◽  
Vol 84 (3) ◽  
pp. 39-46
Author(s):  
Hitoshi Furuta ◽  
Masakatsu Kaneyoshi ◽  
Hiroshi Tanaka ◽  
Eiichi Watanabe
Keyword(s):  
Genetic Algorithm ◽  
Tension Control ◽  
Cable Tension ◽  
Cable Stayed Bridge

Parametric Study of the Dynamic Response a Cable-Stayed Bridge

2001 ◽  
Vol 84 (7) ◽  
pp. 99-106
Author(s):  
Sven Mayer ◽  
Steven L. McCabe
Keyword(s):  
Dynamic Response ◽  
Parametric Study ◽  
Cable Stayed Bridge
Sign in / Sign up

Export Citation Format

Share Document