Characterisation methods and simulation of deformation and failure in metal forming processes
Tools for numerical analysis is a prerequisite in product development. Variations of the finite element method is widely used for simulation of metal manufacturing processes, for example sheet metal forming and hot stamping. However accurate the models are, there is still the issue of parameter esti...
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Luleå tekniska universitet, Material- och solidmekanik
2010
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ftluleatu:oai:DiVA.org:ltu-18511 2023-05-15T17:09:06+02:00 Characterisation methods and simulation of deformation and failure in metal forming processes Lindkvist, Göran 2010 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18511 eng eng Luleå tekniska universitet, Material- och solidmekanik Luleå Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, 1402-1544 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18511 urn:isbn:978-91-7439-084-1 Local 8f9d72f0-1641-11df-bae5-000ea68e967b info:eu-repo/semantics/openAccess Applied Mechanics Teknisk mekanik Doctoral thesis, comprehensive summary info:eu-repo/semantics/doctoralThesis text 2010 ftluleatu 2022-10-25T20:54:00Z Tools for numerical analysis is a prerequisite in product development. Variations of the finite element method is widely used for simulation of metal manufacturing processes, for example sheet metal forming and hot stamping. However accurate the models are, there is still the issue of parameter estimation for the constitutive models used in the simulations.The increased use of high-strength steel in metal manufacturing processes necessitates forming at elevated temperatures. Formblowing and hardening (FH), where an austenitized profile blank is formed in a closed tool by injection of pressurised gas followed by rapid water cooling, is a recent development.The objectives are to increase knowledge regarding: characterisation methods for parameter estimation in constitutive models; numerical simulations of metal forming processes at elevated temperatures.Experimental material characterisation tests have been performed for deformation levels beyond plastic instability in standard tests. Methods for field measurements of deformation have been applied. Measurements were combined with inverse modelling for parameter estimation. Thermomechanical simulation models of the FH process have been developed. Complete process simulations were performed and compared with experiments. A pre-bursting failure criteria were implemented and compared with experimental burst tests. Godkänd; 2010; 20100210 (gorlind); DISPUTATION Ämnesområde: Hållfasthetslära/Solid Mechanics Opponent: Professor Larsgunnar Nilsson, Linköpings universitet Ordförande: Professor Hans-Åke Häggblad, Luleå tekniska universitet Tid: Fredag den 12 mars 2010, kl 10.00 Plats: E 231, Luleå tekniska universitet Doctoral or Postdoctoral Thesis Luleå Luleå Luleå University of Technology Publications (DiVA) |
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Luleå University of Technology Publications (DiVA) |
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ftluleatu |
language |
English |
topic |
Applied Mechanics Teknisk mekanik |
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Applied Mechanics Teknisk mekanik Lindkvist, Göran Characterisation methods and simulation of deformation and failure in metal forming processes |
topic_facet |
Applied Mechanics Teknisk mekanik |
description |
Tools for numerical analysis is a prerequisite in product development. Variations of the finite element method is widely used for simulation of metal manufacturing processes, for example sheet metal forming and hot stamping. However accurate the models are, there is still the issue of parameter estimation for the constitutive models used in the simulations.The increased use of high-strength steel in metal manufacturing processes necessitates forming at elevated temperatures. Formblowing and hardening (FH), where an austenitized profile blank is formed in a closed tool by injection of pressurised gas followed by rapid water cooling, is a recent development.The objectives are to increase knowledge regarding: characterisation methods for parameter estimation in constitutive models; numerical simulations of metal forming processes at elevated temperatures.Experimental material characterisation tests have been performed for deformation levels beyond plastic instability in standard tests. Methods for field measurements of deformation have been applied. Measurements were combined with inverse modelling for parameter estimation. Thermomechanical simulation models of the FH process have been developed. Complete process simulations were performed and compared with experiments. A pre-bursting failure criteria were implemented and compared with experimental burst tests. Godkänd; 2010; 20100210 (gorlind); DISPUTATION Ämnesområde: Hållfasthetslära/Solid Mechanics Opponent: Professor Larsgunnar Nilsson, Linköpings universitet Ordförande: Professor Hans-Åke Häggblad, Luleå tekniska universitet Tid: Fredag den 12 mars 2010, kl 10.00 Plats: E 231, Luleå tekniska universitet |
format |
Doctoral or Postdoctoral Thesis |
author |
Lindkvist, Göran |
author_facet |
Lindkvist, Göran |
author_sort |
Lindkvist, Göran |
title |
Characterisation methods and simulation of deformation and failure in metal forming processes |
title_short |
Characterisation methods and simulation of deformation and failure in metal forming processes |
title_full |
Characterisation methods and simulation of deformation and failure in metal forming processes |
title_fullStr |
Characterisation methods and simulation of deformation and failure in metal forming processes |
title_full_unstemmed |
Characterisation methods and simulation of deformation and failure in metal forming processes |
title_sort |
characterisation methods and simulation of deformation and failure in metal forming processes |
publisher |
Luleå tekniska universitet, Material- och solidmekanik |
publishDate |
2010 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18511 |
genre |
Luleå Luleå |
genre_facet |
Luleå Luleå |
op_relation |
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, 1402-1544 http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18511 urn:isbn:978-91-7439-084-1 Local 8f9d72f0-1641-11df-bae5-000ea68e967b |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766065031692156928 |