Calibration and Implementation of a Simple Model with Directional Distortional Hardening

Kód výsledku v 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>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Calibration and Implementation of a Simple Model with Directional Distortional Hardening

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

Calibration and Implementation of a Simple Model with Directional Distortional Hardening

Popis výsledku anglicky

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

Druh

O - Ostatní výsledky

CEP obor

JJ - Ostatní materiály

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů