Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Constitutive parameter optimisation using metal forming experiment and finite element analysis
2001 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The aim is to investigate a method for optimising parameters in a constitutive model of steel. The obtained parameters should be possible to use as input in a metal forming simulation using the finite element method (FEM). A simple forming experiment is carried out. The experimental output, tool force and displacement, is compared with the same calculated output from a finite element analysis modelling the experimental set-up. The comparison is made using two inverse modelling procedures, yielding two sets of optimised material parameters as output. The parameters obtained are compared with standard tensile test data in an industrially applied simulation of a forming process. It is found that a set of parameters where the flow stress in the constitutive model of the material is optimised using a power function, relating one hundred predefined values of plastic strain to the flow stress, gives the best fit to experimental data. In the applied simulation both sets of parameters resulted in lower calculated press force compared with the use of tensile test parameters. The different optimisation results for the two parameter sets is mainly due to the choice of method to generate the flow stress curve. The methodology of using an initial simple forming experiment combined with an inverse modelling procedure show potential to generate more relevant results than the use of a tensile test. Especially in the early stages of a simulation process where prototype tools are not present for verification of simulation results. It is concluded that the method used here is mostly encouraging but further development is necessary, for example regarding the experimental design.

Place, publisher, year, edition, pages
2001.
Keyword [en]
Technology, Metal forming, Inverse modelling, Optimising, Constitutive model, Simulations, Finite element method
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-59242ISRN: LTU-EX--01/307--SELocal ID: fc4b3920-a7a4-4e94-9660-e360c801787eOAI: oai:DiVA.org:ltu-59242DiVA: diva2:1032630
Subject / course
Student thesis, at least 30 credits
Educational program
Engineering Physics, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(1379 kB)30 downloads
File information
File name FULLTEXT01.pdfFile size 1379 kBChecksum SHA-512
8dc4219d4a18ec900b47d487948e51b3869de80f2fec424a6772ef1c55a57364ae451c6c19c9df0bd7ada0e661c900c422b1412caba92293b38525ec7db5aa6a
Type fulltextMimetype application/pdf

Search outside of DiVA

GoogleGoogle Scholar
Total: 30 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 14 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf