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Numerical and experimental analysis of inelastic and rate-dependent buckling of thin injection-moulded high-density polyethylene structure
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- Kroon, Martin, Professor, 1974- (author)
- Linnéuniversitetet,Institutionen för maskinteknik (MT)
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- Andreasson, Eskil (author)
- Tetra Pak, Sweden
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- Petersson, Viktor (author)
- Tetra Pak, Sweden
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- Elsevier, 2024
- 2024
- English.
- In: International Journal of Solids and Structures. - : Elsevier. - 0020-7683 .- 1879-2146. ; 290
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Semi-crystalline polymers is an important group of materials that is used in a vast array of products. In this study, the rate-dependent properties of high-density polyethylene (HDPE) are investigated, both experimentally and theoretically. Experimental compression testing of a three-dimensional HDPE structure is performed and analysed numerically by use of the finite element method. In addition, an Eulerian constitutive material model for isotropic, semi-crystalline polymers is proposed. The model is able to account for such essential phenomena as strain-rate dependence, work hardening, pressure-dependence of inelastic deformations, and damage. The proposed material model was implemented in Abaqus as a VUMAT, which is an explicit implementation. The material model was calibrated by use of uniaxial tensile tests performed on HDPE dog-bone shaped samples, and the model was further explored by applying the VUMAT implementation to the compression tests of the HDPE structure. The simulation model was able to reproduce the experimental results well, both the uniaxial tests and the compression tests. In particular, the friction present in the compression tests seems to play an important role in determining the buckling mode of the structure.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Keyword
- Maskinteknik
- Mechanical Engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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