On the definition of elastic strain energy density in fatigue modelling
Source abstract
Abstract
Abstract In energy-based fatigue models, in addition to plastic strain energy density calculated from area inside hysteresis loop, positive elastic energy is usually considered. In current elastic energy definitions, mean stress effects in different loading conditions are calculated using different formulations, causing physical inconsistency. In this paper, a new positive elastic energy relationship is suggested. Fatigue data on ZK60, AM50 and Ti-6Al-4V alloys, under constant amplitude at various stress/strain ratios and variable amplitude loads, are employed to evaluate the proposed relationship. It is concluded that this definition yields statistically improved predictions, especially at load cases involving cycles with positive/zero stress ratio.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · High Temperature Alloys and Creep · Microstructure and Mechanical Properties of Steels
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
Show source-provided references
1. A total strain energy density theory for cumulative fatigue damage10.1115/1.3265565 ↗
2. Multiaxial fatigue damage criterion10.1115/1.3226012 ↗
3. Upper and lower fatigue life limits model using energy-based fatigue properties10.1016/j.ijfatigue.2005.07.039 ↗
4. An energy-based fatigue life assessment model for various metallic materials under proportional and non-proportional loading conditions10.1016/j.ijfatigue.2006.07.017 ↗
5. Multiaxial cyclic behaviour and fatigue modelling of AM30 Mg alloy extrusion10.1016/j.ijfatigue.2016.12.037 ↗
6. Fatigue of ZK60 magnesium alloy under uniaxial loading10.1016/j.ijfatigue.2014.02.019 ↗
7. Cyclic deformation and fatigue of extruded AZ31B magnesium alloy under different strain ratios10.1016/j.msea.2015.09.084 ↗
8. Multiaxial behaviour of wrought magnesium alloys – a review and suitability of energy-based fatigue life model10.1016/j.tafmec.2014.08.004 ↗
9. Low-cycle fatigue characteristics of rolled Mg–3Al–1Zn alloy10.1016/j.ijfatigue.2010.05.002 ↗
10. A multiaxial fatigue criterion including mean-stress effect10.1520/STP24795S ↗
11. Investigation of uniaxial low-cycle fatigue failure behavior of hot-rolled AZ91 magnesium alloy10.1016/j.ijfatigue.2012.10.010 ↗
12. Deformation behavior and fatigue analysis of magnesium wrought alloys under variable amplitude loading10.1016/j.matpr.2015.05.028 ↗
13. Uniaxial cyclic deformation and fatigue behavior of AM50 magnesium alloy sheet metals under symmetric and asymmetric loadings10.1016/j.matdes.2014.12.056 ↗
14. Fatigue damage evaluation of a high pressure tube steel using cyclic strain energy density10.1016/S0308-0161(02)00135-7 ↗
15. A finite-volume-energy based approach to predict the static and fatigue behavior of components with sharp V-shaped notches10.1023/A:1013595930617 ↗
16. A review of the volume-based strain energy density approach applied to V-notches and welded structures10.1016/j.tafmec.2009.10.001 ↗
17. Anisotropy in the quasi-static and cyclic behavior of ZK60 extrusion: characterization and fatigue modeling10.1016/j.matdes.2018.10.026 ↗
18. Strain-based fatigue data for Ti–6Al–4V ELI under fully-reversed and mean strain loads10.1016/j.dib.2016.02.014 ↗
19. Stress-based fatigue life prediction models for AZ31B magnesium alloy under single-step and multi-step asymmetric stress-controlled cyclic loadings10.1016/j.commatsci.2013.02.023 ↗