Upsetting Analysis of High-Strength Tubular Specimens with the Taguchi Method

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F16%3A00302866" target="_blank" >RIV/68407700:21220/16:00302866 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.mdpi.com/2075-4701/6/11/257/htm" target="_blank" >http://www.mdpi.com/2075-4701/6/11/257/htm</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met6110257" target="_blank" >10.3390/met6110257</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Upsetting Analysis of High-Strength Tubular Specimens with the Taguchi Method

Popis výsledku v původním jazyce

In order to obtain input data for numerical simulations of tube forming, the material properties of tubes need to be determined. A tube tensile test can only be used to measure yield stress and ultimate tensile stress. For tubes with a large diameter/thickness ratio (D/t), tensile specimens are cut out and processed in a similar way as with sheet metal. However, for thin tubes with a diameter/thickness ratio below 10, the tensile specimens could not be cut out. The flow curve of the analyzed tube with a small diameter and D/t ratio of 7 was determined with a ring-shaped specimen. The experimental force-travel diagram was acquired. A reverse-engineering method was used to determine flow curves by numerical simulations. Using an L25 orthogonal array of the Taguchi method different flow curve parameters and friction coefficient combinations were selected. Tube upsetting with determined parameter combinations was performed with the finite element method. With analysis of variance influential equations among selected input parameters were determined for the force levels at six upsetting states. With the evaluation of known friction coefficients and flow curve parameters, K, n, and ε0 according to the Swift approximation were determined and proved by the final shape of the workpiece.

Název v anglickém jazyce

Upsetting Analysis of High-Strength Tubular Specimens with the Taguchi Method

Popis výsledku anglicky

In order to obtain input data for numerical simulations of tube forming, the material properties of tubes need to be determined. A tube tensile test can only be used to measure yield stress and ultimate tensile stress. For tubes with a large diameter/thickness ratio (D/t), tensile specimens are cut out and processed in a similar way as with sheet metal. However, for thin tubes with a diameter/thickness ratio below 10, the tensile specimens could not be cut out. The flow curve of the analyzed tube with a small diameter and D/t ratio of 7 was determined with a ring-shaped specimen. The experimental force-travel diagram was acquired. A reverse-engineering method was used to determine flow curves by numerical simulations. Using an L25 orthogonal array of the Taguchi method different flow curve parameters and friction coefficient combinations were selected. Tube upsetting with determined parameter combinations was performed with the finite element method. With analysis of variance influential equations among selected input parameters were determined for the force levels at six upsetting states. With the evaluation of known friction coefficients and flow curve parameters, K, n, and ε0 according to the Swift approximation were determined and proved by the final shape of the workpiece.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

—

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Metals — Open Access Metallurgy Journal

ISSN

2075-4701

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

1-14

Kód UT WoS článku

000389600400004

EID výsledku v databázi Scopus

2-s2.0-84995695026