New creep constitutive equation for finite element modelling including transient effects

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F18%3A00488943" target="_blank" >RIV/68081723:_____/18:00488943 - isvavai.cz</a>
Alternative codes found
RIV/61388998:_____/18:00488943
Result on the web
<a href="http://dx.doi.org/10.1016/j.mechmat.2018.01.008" target="_blank" >http://dx.doi.org/10.1016/j.mechmat.2018.01.008</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mechmat.2018.01.008" target="_blank" >10.1016/j.mechmat.2018.01.008</a>

Result language
angličtina
Original language name
New creep constitutive equation for finite element modelling including transient effects
Original language description
Creep experiments are time consuming and expensive, moreover, it is not possible to carry out experiments under the actual service conditions of particular materials due to the very low creep strain rate. However, the process seems to be an ideal field for computer modelling. The experimental data are obviously only available for steady-state conditions, and so the effects of varying conditions during startup or shutdown of the components can be described by modelling. Modelling creep deformation is usually based on the so-called creep constitutive equations, which describe the strain rate dependence on stress, temperature and time, or creep strain. Unfortunately, the equations are derived from conventional creep experiments under constant load conditions, and so the transient effects upon stress changes are ignored. Because the stress is transformed between model elements, a correct description of the creep behaviour must contain the transient effects. In this work, the conventional approach to describing primary and secondary creep stages is combined with an internal stress model of the transient creep stage to address the problem of the stress changes, as well as that of the low-stress creep regime.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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