Results 241 to 250 of about 11,030,662 (278)

On the modeling of hardening in metals during non-proportional loading

International Journal of Plasticity, 2008
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Wang, J., Levkovitch, V., Reusch, F., Svendsen, B., Huétink, J., van Riel, M.   +5 more
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Fatigue-based topology optimization with non-proportional loads

Computer Methods in Applied Mechanics and Engineering, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Shanglong Zhang, Chau Le, Arun L. Gain, Julián A. Norato   +3 more
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A fatigue model for sensitive materials to non-proportional loadings

International Journal of Fatigue, 2015
Abstract The present study proposes a novel fatigue model based on virtual strain energy. This model separates loading paths based on their non-proportionality where directly takes into account the loading in fatigue life prediction. The proposed fatigue model is expressed in two tension-based and shear-based equations for two tensile and shear ...
Saeid Babaei, Ahmad Ghasemi-Ghalebahman, Ramezanali Hajighorbani   +2 more
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The non-proportional loading of mild steel

Materials Research Proceedings
Abstract. The effect of proportional loading on formability has been extensively studied. However, non-proportional loading occurs frequently in a stamping operation and its impact on formability has been studied less. Non-proportional loading occurs in two areas of stamping: continuously during the draw stage of a complex geometry and discontinuously ...
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Dynamic Plastic Deformation for Non-Proportional Loading Paths

1982
Improved understanding of the plastic response of metals subjected to loading histories which include marked changes in direction of the stress trajectories (in a hyperspace of components of the stress tensor) is of fundamental importance in plasticity theory and its applications.
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Creep rupture of copper and aluminium under non-proportional loading

Journal of the Mechanics and Physics of Solids, 1981
Abstract The development of existing constitutive equations is described for high temperature creep deformation and rupture under proportional loading. The validity of these equations has been assessed for non-proportional loading of copper and aluminium alloy test specimens.
W.A. Trampczynski, D.R. Hayhurst, F.A. Leckie   +2 more
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Choice of Objective Rate for Non-Proportional Loading Applications

Computer Technology and Applications, 2004
Traditionally, the validation of three dimensional constitutive formulations (i.e. theories of plasticity) has been carried out using biaxial testing. The most widely used method for biaxial testing is the combined tension-torsion loading of thin-walled cylindrical specimens. Unfortunately, the results obtained in the past, using the incremental theory
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Multiaxial Fatigue in Drill Pipes Under Non-Proportional Loading

Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); SPC Track for Senate, 2017
The scope of this research is to estimate the fatigue life and crack initiation direction in components subjected to multiaxial, nonproportional loading. Two critical plane approaches — Fatemi-Socie and McDiarmid — were used to estimate low cycle and high cycle fatigue lives, respectively.
Nahla A. Helmy, Maher Y. A. Younan
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Creep Deformation and Rupture Under Non-Proportional Loading

1981
The behaviour of copper, an aluminium alloy and Nimonic 80A has been investigated for non-proportional loading conditions. The results of simple creep experiments conducted on thin tubes are reported and are interpreted in the light of a single state variable theory for proportional loading. It is shown that the behaviour of the chosen materials may be
W. A. Trampczynski, D. R. Hayhurst
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Use of Local Approach Methods With Non-Proportional Load Histories

Volume 6: Materials and Fabrication, Parts A and B, 2009
So-called ‘local approach’ methods for fracture analyses, such as the commonly used Beremin model, are attractive as a means to predict component failure due to their flexibility and applicability to a wide range of geometries. However, in cases where cyclic loading occurs, resulting in the accumulation of plastic strain and accompanying residual ...
Lewis, SJ, Truman, CE, Smith, DJ
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