Publication detail
Computational simulation of cold forming of bolts and prediction of material damage during the process
PETRUŠKA, J. SKALKA, P. JANÍČEK, L. RUSZ, S.
Czech title
Výpočtová simulace tváření šroubu za studena a predikce poškození materiálu
English title
Computational simulation of cold forming of bolts and prediction of material damage during the process
Type
conference paper
Language
en
Original abstract
The paper deals with application of selected criteria of ductile fracture to prediction of material damage during the production of bolts by cold forming. Two basic steps of this procedure are described. First, the fracture criteria para- meters are identi ed by numerical simulation of realized material fracture tests in compression. Second, two main stages of the bolt production (forward extru- sion of shaft and compression of head) are computationally simulated as a large displacement, elasto-plastic problem. The computed history of stress and strain is then used for evaluation of the fracture criteria and compared with the identi- ed limit fracture values of the material. A number of geometrical versions are analysed to evaluate the in uence of shape on the probability of fracture.
Czech abstract
Příspěvek se zabývá aplikací vybraných kritérií tvárného lomu na predikci poškození materiálu při výrobě šroubů tvářením za studena. Je analyzována řada geometrických variant a vyhodnocen vliv tvaru polotovaru na pravděpodobnost porušení.
English abstract
The paper deals with application of selected criteria of ductile fracture to prediction of material damage during the production of bolts by cold forming. Two basic steps of this procedure are described. First, the fracture criteria para- meters are identi ed by numerical simulation of realized material fracture tests in compression. Second, two main stages of the bolt production (forward extru- sion of shaft and compression of head) are computationally simulated as a large displacement, elasto-plastic problem. The computed history of stress and strain is then used for evaluation of the fracture criteria and compared with the identi- ed limit fracture values of the material. A number of geometrical versions are analysed to evaluate the in uence of shape on the probability of fracture.
Keywords in English
FE simulation, bulk forming, formability
RIV year
2004
Released
10.05.2004
Publisher
Ústav termomechaniky AV ČR
Location
Svratka
ISBN
80-85918-88-9
Book
Engineering mechanics 2004
Pages count
7
BIBTEX
@inproceedings{BUT17029,
author="Jindřich {Petruška} and Petr {Skalka} and Libor {Janíček} and Stanislav {Rusz},
title="Computational simulation of cold forming of bolts and prediction of material damage during the process",
booktitle="Engineering mechanics 2004",
year="2004",
month="May",
publisher="Ústav termomechaniky AV ČR",
address="Svratka",
isbn="80-85918-88-9"
}