Experimental analysis of crack formation at sheet metal edges

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F23%3A00372039" target="_blank" >RIV/68407700:21220/23:00372039 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.37904/metal.2023.4694" target="_blank" >https://doi.org/10.37904/metal.2023.4694</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/metal.2023.4694" target="_blank" >10.37904/metal.2023.4694</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental analysis of crack formation at sheet metal edges

Popis výsledku v původním jazyce

During the pressing of sheet metal parts, cracks may form around the holes that weren't predicted by numerical simulations. These cracks are caused by the partial depletion of the forming capacity at the edges of the hole due to the preparation technology used, most often shearing. The aim of this article is to refine the simulation models by introducing boundary conditions to describe this condition. The Hole Expansion Test (HET), described in ISO 16630 and currently the only worldwide standardised method for determining the sensitivity of a material to edge crack formation, is used to determine the limiting deformation at the edge of the material. Materials commonly used in the automotive industry were chosen for the experiment. Holes were made in samples of each material according to ISO 16630 by shearing, laser cutting, and electro-discharge machining. The testing was carried out according to ISO 16630 at room temperature and the specimens were evaluated manually just before failure. The results obtained were evaluated and compared with theoretical premises. By refining simulation models and introducing boundary conditions that account for the depletion of forming capacity at the edges of holes, manufacturers can better predict and prevent the formation of cracks during the pressing of sheet metal parts. This can improve the quality and durability of automotive parts and lead to safer and more reliable vehicles.

Název v anglickém jazyce

Experimental analysis of crack formation at sheet metal edges

Popis výsledku anglicky

During the pressing of sheet metal parts, cracks may form around the holes that weren't predicted by numerical simulations. These cracks are caused by the partial depletion of the forming capacity at the edges of the hole due to the preparation technology used, most often shearing. The aim of this article is to refine the simulation models by introducing boundary conditions to describe this condition. The Hole Expansion Test (HET), described in ISO 16630 and currently the only worldwide standardised method for determining the sensitivity of a material to edge crack formation, is used to determine the limiting deformation at the edge of the material. Materials commonly used in the automotive industry were chosen for the experiment. Holes were made in samples of each material according to ISO 16630 by shearing, laser cutting, and electro-discharge machining. The testing was carried out according to ISO 16630 at room temperature and the specimens were evaluated manually just before failure. The results obtained were evaluated and compared with theoretical premises. By refining simulation models and introducing boundary conditions that account for the depletion of forming capacity at the edges of holes, manufacturers can better predict and prevent the formation of cracks during the pressing of sheet metal parts. This can improve the quality and durability of automotive parts and lead to safer and more reliable vehicles.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Metal 2023

ISBN

978-80-88365-12-9

ISSN

2694-9296

e-ISSN

2694-9296

Počet stran výsledku

5

Strana od-do

247-251

Název nakladatele

TANGER

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

17. 5. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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