Calibration and Implementation of a Simple Model with Directional Distortional Hardening

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F13%3A00395729" target="_blank" >RIV/61388998:_____/13:00395729 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Calibration and Implementation of a Simple Model with Directional Distortional Hardening
Original language description
As seen in numerous experiments, yield surfaces change their shape and location during plastic straining. Several models of directional distortional hardening to capture such behavior have been proposed recently, e.g., by Feigenbaum and Dafalias [1], [2]and Shutov et al. [5]. In particular, the so-called ?-model makes use of the Armstrong-Frederick rule with a recovery term to introduce distortional variable. The follow up papers [4], [3] addressed the issues of convexity and multiaxial ratcheting. Inthis work, the ?-model will be reviewed first and the necessary and sufficient conditions to ensure thermodynamic consistency and convexity presented. Employing these constraints and analytical solutions to simple loading modes, such as the uniaxial tension, pure shear and cyclic test conditions, close form formulas have been established for inverse material parameters fitting procedures. The way the model reproduces varying experimental input data is demonstrated by means of examples. T
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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