Results 271 to 280 of about 235,418 (287)

Deformation of steel-concrete composite beams under constant amplitude fatigue loading

2011 International Conference on Electric Technology and Civil Engineering (ICETCE), 2011
With degeneration of material properties and accumulation of damage under fatigue loading, deformation of steel-concrete composite beams increases. Therefore, it's necessary to evaluate the additional deformation caused by fatigue loads. Based on research results world widely, constitutive relations of materials such as concrete and steel were chosen ...
null Yang Tao, null Zhou Liang, null Lu Yuanchun   +2 more
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Multiaxial fatigue of welded joints under constant and variable amplitude loadings

Fatigue & Fracture of Engineering Materials & Structures, 2001
Flange‐tube joints from fine grained steel StE 460 with unmachined welds were investigated under biaxial constant and variable amplitude loading (bending and torsion) in the range of 103 to 5 × 106 cycles to crack initiation and break‐through, respectively. In order not to interfere with residual stresses they were relieved by a heat treatment.
C. M. Sonsino, M. Kueppers
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Fatigue propagation threshold of short cracks under constant amplitude loading

International Journal of Fatigue, 2003
Abstract In this study a threshold for fatigue crack propagation as a function of crack length is defined from a depth given by the position d of the strongest microstructural barrier to crack propagation, which defines the plain fatigue limit.
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Equivalent Constant-Amplitude Concept for Crack Growth Under Spectrum Loading

1976
A concept based on the crack-closure phenomenon has been developed to replace random-load spectra with constant-amplitude loading in both analysis and tests. The maximum load and the crack-opening load in the constant-amplitude loading are chosen to be equal to those for the spectrum, so that both crack-growth mode and the crack length at failure are ...
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Peridynamic Fatigue Model for Composites Under Constant and Variable Amplitude Loads

American Society for Composites 2019, 2019
In previous presented work [1], the authors developed a bond-based peridynamic composite approach with explicit incorporation of fiber and matrix material regions. This explicit definition of fiber and matrix material regions enabled the capturing of anisotropic behavior, but required careful and laborious determination of peridynamic material ...
ERDOGAN MADENCI, ATILA BARUT, NAM PHAN
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Fatigue of cast aluminium alloys under constant and variable-amplitude loading

International Journal of Fatigue, 1996
Abstract Three cast aluminium materials, Al 206, Al 319 and Al 390, were fatigue tested under constant- and variable-amplitude loading. A stress ratio of −1 was used for the constant-amplitude tests. The variable-amplitude load history consisted of underloads followed by constant-amplitude small cycles. The stress ratio and the number of the constant-
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A statistical model for fatigue fracture under constant-amplitude cyclic loading

Engineering Fracture Mechanics, 1981
Abstract A statistical approach to fatigue fracture under constant load is presented. Crack initiation due to detrimentally-acting external factors is considered, with a time-dependent rate assumed for an ensemble of growing stochastically-independent fatigue cracks.
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Surface roughness evolution under constant amplitude fatigue loading using crystal plasticity

Engineering Fracture Mechanics, 2005
Crystallographic plasticity has been applied to study the initiation of microcracks on the smooth surface of polycrystals under a uniform applied stress. Even under a uniform external stress, due to the different crystallographic orientations of the grains in the polycrystals, there is non-uniform stress distribution and the deformation is also not ...
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Fatigue Crack Growth Predictions of Surface Cracks under Constant-Amplitude and Variable-Amplitude Loading

1994
Mechanical Maritime and Materials ...
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Fatigue behaviour of Polarit 725 welds under constant amplitude loading

1994
Fatigue testing of longitudinal non-load carrying fillet welds manufactured from both hot rolled and 21.1% cold rolled Polarit 725 stainless steel was performed. The cyclic fatigue loading was constant amplitude with R = sigmamin /sigmamax = 0. Test results show that for this material and geometry the design curves specified by SFS 2378 gave a good ...
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