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Simulation of the anisotropic material properties in polymers obtained in thermal forming process
Jönköping University, School of Engineering, JTH, Product Development.
Jönköping University, School of Engineering, JTH, Product Development.
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In an attempt to improve the quality in finite element analysis of thermoformed components, a method for predicting the thickness distribution is presented. The strain induced anisotropic material behaviour in the amorphous polymers of concern is also taken into account in the method. The method comprises of obtaining raw material data from experiments, followed by a simulation of the vacuum thermoforming process where hyperelastic material behaviour is assumed. The theory of hyperelasticity that was applied was based on the Ogden model and implemented in the FE-software LS-DYNA. Material behaviour from thermoformed prototypes is examined by experiments and implemented together with the mapped results from the thermoforming simulation in a succeeding FE-model. For the latter, the three-parameter Barlat model was suggested, giving the possibility to account for anisotropic material behaviour based on an initial plastic strain.

Place, publisher, year, edition, pages
2018. , p. 59
Keywords [en]
Plastics, Acrylonitrile Butadiene Styrene, Vacuum Thermoforming, Strain Induced Anisotropy, Hyperelasticity, Ogden, Barlat, LS-DYNA, FEM Analysis, Forecasting Material Properties, Thickness Distribution, Process Simulation
National Category
Other Mechanical Engineering
Identifiers
URN: urn:nbn:se:hj:diva-40792ISRN: JU-JTH-PRU-2-20180096OAI: oai:DiVA.org:hj-40792DiVA, id: diva2:1223703
External cooperation
Thule Group AB
Subject / course
JTH, Product Development
Supervisors
Examiners
Available from: 2018-06-26 Created: 2018-06-25 Last updated: 2018-06-26Bibliographically approved

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
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