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Fatigue life prediction using multiaxial energy calculations with the mean stress effect to predict failure of linear and nonlinear elastic solids [Elektronski vir]Nagode, Marko ; Šeruga, DomenAn approach is presented that enables the calculation of elastic strain energy in linear and nonlinear elastic solids during arbitrary thermomechanical load cycles. The approach uses the simple fact ... that the variation of both strain and complementary energies always forms a rectangular shape in stress-strain space, hence integration is no longer required to calculate the energy. Furthermore, the approach considers the mean stress effect so that predictions of fatigue damage are more realistically representative of real-life experimental observations. By doing so, a parameter has been proposed to adjust the mean stress effect. This parameter [Alpha] is based on the well-known Smith-Watson-Topper energy criterion, but allows consideration of other arbitrary mean stress effects, e.g. the Bergmann type criterion. The approach has then been incorporated into a numerical method which can be applied to uniaxial and multiaxial, proportional and non-proportional loadings to predict fatigue damage. The end result of the method is the cyclic evolution of accumulated damage. Numerical examples show how the method presented in this paper could be applied to a nonlinear elastic materialSource: Results in physics [Elektronski vir]. - ISSN 2211-3797 (Vol. 6, 2016, f. 352-364)Type of material - e-articlePublish date - 2016Language - englishCOBISS.SI-ID - 14715163
Author
Nagode, Marko |
Šeruga, Domen
Topics
utrujanje |
temperatura |
energija |
večosno napetostno stanje |
srednja napetost |
fatigue |
temperature |
energy |
multiaxial stress |
mean stress
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Nagode, Marko | 13469 |
Šeruga, Domen | 29047 |
Source: Personal bibliographies
and: SICRIS
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