Results 181 to 190 of about 1,750 (215)
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Electronic Speckle‐Pattern Interferometry Measurements of Structural Ratcheting Strain
Strain, 2010Abstract: Several tensile specimens with a central hole were subjected to a cyclic loading for which the Von Mises stress was beyond the initial yield stress in the vicinity of the hole. The tensile machine was fixed together with a phase‐shifting electronic speckle‐pattern interferometry measurement bench that makes it possible to perform strain ...
Farge, L., Nazarov, R., Ayadi, Z.
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Numerical analysis of uniaxial strain ratcheting of conductive adhesives
2009 8th International Conference on Reliability, Maintainability and Safety, 2009Under the condition of uniaxial strain(Amplitude is ±0.025%), the elastic-plastic finite element method was used to analyze the bonding of conductive/copper wire. The result shows that the plastic strain of X and Y direction is mainly occurred at two positions: one is at the left arc side; the other is at the right arc side of the Department.
Zhi Li +4 more
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Ratchetting strain as a driving force for fatigue crack growth
International Journal of Fatigue, 2013Abstract Ratchetting deformation has significant implications on material damage and fatigue life of components under service loading conditions. In this work, we explore the concept of ratchetting strain as a driving force in controlling crack growth, both time-independent and time-dependent, utilising elasto-plastic, visco-plastic and crystal ...
J. Tong, L.G. Zhao, B. Lin
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Ratchetting Strains in Cyclic Plastic Bending
1991The incremental downward collapse of cantilevers subjected to cyclic horizontal deflections and a steady sustained vertical load is examined. The material behaviour of elemental fibres in the beams, undergoing push-pull cycles, is modelled using an appropriate power law.
S. J. Harvey, D. Elcock, A. P. Toor
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On the modeling of large ratcheting strains with large time increments
Engineering Computations, 2007Purpose This paper aims to speed up finite element analyses of structures with a highly nonlinear material response subjected to many loading cycles. Design/methodology/approach An approach where large time increments are taken in an adaptive ...
Johansson, Göran, Ekh, Magnus
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Upper Bounds for Accumulated Strains Due to Creep Ratcheting
Journal of Pressure Vessel Technology, 1974A rigorous method of bounding both the total accumulated strain and the strain ranges due to cyclic operation in the creep regime is presented. These limits can be obtained from the results of purely elastic stress analyses. The basic problem of a cylindrical vessel under internal pressure subjected to cyclic thermal stresses is solved in detail.
W. J. O’Donnell, J. Porowski
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Limited Versus Unlimited Strain Accumulation Due to Ratcheting Mechanisms
Journal of Pressure Vessel Technology, 2019After distinguishing material ratcheting and structural ratcheting, different phenomena related to structural ratcheting are gathered. Ratcheting of elastic–plastic structures observed with stationary position of loads is distinguished from ratcheting with moving loads. Both categories are illustrated by examples.
Hartwig Hübel, Bastian Vollrath
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Parameter identification and modeling of large ratcheting strains in carbon steel
Computers & Structures, 2006In this paper the parameter identification procedure of a material model for large multi-axial ratcheting strains, as proposed in [Johansson G, Ekh M, Runesson K. Computational modelling of inelastic large ratcheting strains. Int J Plast 2005;20:955-80], is demonstrated.
Göran Johansson +2 more
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A new polycrystalline plasticity model to improve ratchetting strain prediction
Mechanics Research Communications, 2009zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Abdeljaoued, D. +3 more
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Kinematic hardening analysis of ratchet strain in the “pulley test”
International Journal of Mechanical Sciences, 1984Abstract The classical Bree problem—which represents an uniaxial model of a thin tube subjected to combined internal pressure and cyclic thermal stress across its wall—can be simulated by means of the pulley test in which a wire or strip specimen is subjected to combined steady tensile stress and cyclic bending stress.
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