Results 251 to 260 of about 126,861 (303)
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Damage Models for Cyclic Plasticity
Key Engineering Materials, 2003The process of void growth in ductile materials under alternating plastification is studied by means of unit-cell calculations. Constitutive models for damage evolution in ductile materials as the micromechanical model by Gurson, Tvergaard and Needleman and the continuum damage model by Rousselier are systematically investigated with respect to their ...
Wolfgang Brocks, Dirk Steglich
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Modelling of Cyclic Plasticity and Crack Propagation
Key Engineering Materials, 2010An experimental and numerical study of the cyclic deformation and low-cycle fatigue behaviour of the aluminium alloy AlCu5BiPb–T8 is presented. The experimental program included monotonic tensile tests, symmetric and unsymmetric strain-controlled fatigue tests, fracture toughness tests, as well as fatigue crack initiation and propagation tests.
Kodvanj, Janoš +4 more
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Endochronic Theory of Cyclic Plasticity With Applications
Journal of Applied Mechanics, 1984Integral constitutive equations of the endochronic type with only two easily determined material constants are shown to predict with computational ease the stress (plastic strain) response of normalized mild steel and Grade 60 steel to a variety of general strain (stress) histories, without a need for special unloading-reloading or memory rules.
Valanis, K. C., Lee, C. F.
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Cyclic plasticity, creep, and TMF
2005Abstract In Chapter 9, we examined creep in the aero-engine combustor material nickel-base superalloy C263. In this chapter, we address combined anisothermal cyclic plasticity and creep. We use time-independent cyclic plasticity with both isotropic and kinematic hardening which we combine with the physically based creep model described ...
Fionn Dunne, Nik Petrinic
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Limit Response in Cyclic Plasticity
1991The objective of this communication is to present a numerical investigation on the computation of the cyclic response of elastic-plastic structures under cyclic loading. First, we investigate a cyclic approach method based upon a direct research of cyclic solutions by iterative procedure ensuring the periodic response at the local scale and at every ...
Samir Akel +2 more
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Dislocation dynamics in cyclic plastic deformation II. Strain bursts
Applied Physics A: Materials Science & Processing, 1995The paper presents a theoretical investigation of the slip avalanches (so-called strain bursts) which occur in single-glide-orientated face-centered cubic or hexagonal close-packed metals during stress-amplitude-controlled cyclic plastic deformation. The study is based on a model of the dynamics of dislocations that has been developed in a companion ...
M. Zaiser, W. Frank
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Plasticity with cyclic hot working
Strength of Materials, 1994A tensor model of damage accumulation is suggested in order to determine limiting strains. Clear criterial dependences are established as applied to symmetric, asymmetric, and block deformation regimes. The relationships obtained are analyzed quantitatively and qualitatively, and they are compared with experimental data.
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Monotonic and cyclic crack tip plasticity
International Journal of Fatigue, 1984Abstract Monotonic and cyclic plastic zone sizes were measured in a medium strength ferrite-pearlite steel (BM 45) tested in fatigue at 25 Hz at room temperature. Two methods were applied: microhardness and the recently developed ‘fatigue in compression’ technique. The results obtained are discussed in terms of accuracy and reliability.
L GUERRAROSA, C MOURABRANCO, J RADON
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Dislocation dynamics in cyclic plastic deformation I. Monotonic hardening
Applied Physics A: Materials Science & Processing, 1995The paper presents a model of the dislocation dynamics in single-glide-orientated face-centered cubic or hexagonal close-packed monocrystals during cyclic plastic deformation. For the densities of both mobile dislocations and immobile dislocation dipoles, equations of evolution are derived.
M. Zaiser, W. Frank
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Benchmark Cyclic Plastic Notch Strain Measurements
Journal of Engineering Materials and Technology, 1983Plastic strains at the roots of notched specimens of Inconel 718 subjected to tension-compression cycling at 650°C are reported. These strains were measured with a laser-based technique over a gage length of 0.1 mm and are intended to serve as “benchmark” data for further development of experimental, analytical, and computational approaches.
William N. Sharpe, Michael Ward
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