Change search
ReferencesLink to record
Permanent link

Direct link
Validation of material model for polypropylene (PP)
Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, Department of Structural Engineering.
2012 (English)MasteroppgaveStudent thesis
Abstract [en]

A hyperelastic-viscoplastic material model intended for thermoplastics has been developed by SIMLab at NTNU. This model formed the basis of the thesis, where a material model for the polymer polypropylene was calibrated and validated. Four rounds of material testing were carried out. Tension and compression tests formed the basis for a calibration of the material model. Two different component tests were used for validation; stretching of a plate with a hole and plate impact tests. The calibrated model was implemented as a user-defined material model in the non-linear finite element code LS-DYNA, and numerical simulations of the tension and compression tests were carried out in order to verify the calibrated parameters. The component tests were numerically simulated with the purpose of controlling the ability of the model to predict the behaviour of the material when subjected to more complex loading cases. The calibrated material model was able to capture the main characteristics of the experimental tests. The model does, however, have limitations, as it was not able to correctly predict all strain rate effects of the material at high strain rates, like viscoelasticity. A partly recalibration of the material model was carried out to enable the model to predict the material’s behaviour at high strain rates.

Place, publisher, year, edition, pages
Institutt for konstruksjonsteknikk , 2012. , 146 p.
Keyword [no]
ntnudaim:7841, MTPROD produktutvikling og produksjon, Industriell mekanikk
URN: urn:nbn:no:ntnu:diva-18793Local ID: ntnudaim:7841OAI: diva2:566270
Available from: 2012-11-08 Created: 2012-11-08

Open Access in DiVA

fulltext(9016 kB)3243 downloads
File information
File name FULLTEXT01.pdfFile size 9016 kBChecksum SHA-512
Type fulltextMimetype application/pdf
cover(184 kB)23 downloads
File information
File name COVER01.pdfFile size 184 kBChecksum SHA-512
Type coverMimetype application/pdf

By organisation
Department of Structural Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 3243 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

Total: 100 hits
ReferencesLink to record
Permanent link

Direct link