Results 191 to 200 of about 6,620 (226)

Ratchetting Strains in Cyclic Plastic Bending

1991
The 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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Influence of Ratcheting Strain on Tensile Properties of A356 Alloy

Materials Today: Proceedings, 2018
Abstract Ratcheting, a special kind of fatigue damage, is known to occur under the influence of asymmetric stress-controlled cyclic loading. Engineering structures undergo premature failure once ratcheting damage happens to these. The present study aims to describe the effect of the imposition of previous ratcheting damage on the tensile properties ...
Srimant Kumar Mishra, Himadri Roy, Krishan Dutta   +2 more
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On the modeling of large ratcheting strains with large time increments

Engineering Computations, 2007
Purpose 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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Strain ratcheting mechanisms in the backfill of integral bridges

Canadian Geotechnical Journal
Integral bridges use a jointless and bearingless design to minimise long-term maintenance. Interaction between the abutments and backfill due to thermal movements of the deck causes an accumulation of strain and an associated increase in earth pressure over time, with the mechanisms underlying this increase not being well understood.
Douglas G. Morley, Gopal S.P. Madabhushi, Dennis Sakufiwa   +2 more
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Limited Versus Unlimited Strain Accumulation Due to Ratcheting Mechanisms

Journal of Pressure Vessel Technology, 2019
After 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, 2006
In 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, Johan Ahlström, Magnus Ekh   +2 more
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Kinematic hardening analysis of ratchet strain in the “pulley test”

International Journal of Mechanical Sciences, 1984
Abstract 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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A new polycrystalline plasticity model to improve ratchetting strain prediction

Mechanics Research Communications, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Abdeljaoued, D., Ben Naceur, I., Sai, Kacem, Cailletaud, Georges   +3 more
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Ratchetting Under Cyclic Axial Strain with Torsional Stress

1973
In order to investigate the fundamental behavior of thermal stress ratchetting, strain controlled push-pull low-cycle fatigue tests with steady torsional stress were conducted on ASTM A302-B steel, AISI 304 steel, and JIS SCM 3 steel under constant elevated and cyclic temperatures.
H Yamanouchi, Y Asada, Y Wakamatsu
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Measurement of Thermal Ratcheting Strain on the Structures by the Laser Speckle Method

Volume 3: Design and Analysis, 2006
Prevention of thermal ratcheting is an important problem for high temperature components of fast breeder reactors that are subjected to cyclic thermal loads. To clarify ratcheting behaviors, structural model tests were planned. Strain measurement is important for understanding the thermal ratcheting phenomenon The conventional measurement by strain ...
Daigo Watanabe, Yasuharu Chuman, Tomomi Otani, Hiroshi Shibamoto, Kazuhiko Inoue, Naoto Kasahara   +5 more
openaire   +1 more source