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Choice of Objective Rate for Non-Proportional Loading Applications
Computer Technology and Applications, 2004Traditionally, 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, 2017The 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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Sequentially linear analysis of fracture under non-proportional loading
Engineering Fracture Mechanics, 2008Sequentially linear analysis avoids convergence problems typical of non-linear finite element analysis by directly specifying a damage increment instead of a load or displacement increment. A series of linear analyses is used to model highly non-linear behavior without an iterative solution algorithm. The primary contribution herein is the extension of
Matthew J. DeJong +2 more
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Use of Local Approach Methods With Non-Proportional Load Histories
Volume 6: Materials and Fabrication, Parts A and B, 2009So-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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Fatigue Criterion Based on the Novoshilov Criterion for Non-proportional Loadings*
Materials Testing, 2011Abstract In the present paper the fatigue limit has been calculated under non-proportional loads, proposing a modification of the Huber-von Mises-Hencky criterion, i. e. the Novoshilov interpretation of that criterion was applied. As an effective amplitude, the maximum value of shear stress in the non-proportional load cycle was assumed.
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Dynamic Plastic Deformation for Non-Proportional Loading Paths
1982Improved 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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Anisotropic Plasticity During Non-proportional Loading
2022Frédéric Barlat, Seong-Yong Yoon
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Multiaxial fatigue life and strength criteria for non-proportional loading*
Materials Testing, 2006Abstract In the article a proposal of loading non-proportionality measure H for sinusoidal biaxial loading has been presented. On the basis of non-proportionality measure, there has been proposed a bending and torsional fatigue strength, with a phase shift of components and the mean value has been proposed. Moreover, a high-cycle fatigue
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Model of non-proportional fatigue load in the form of block load spectrum
Materialwissenschaft und Werkstofftechnik, 2014D. Skibicki, J. Sempruch, Ł. Pejkowski
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