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Experimental and numerical assessment of the work of fracture in injection-moulded low-density polyethylene
Linnaeus University, Faculty of Technology, Department of Mechanical Engineering.
Tetra pak;Blekinge Technical University.
Tetra pak.
Malmö University;Lund University.
2018 (English)In: Engineering Fracture Mechanics, ISSN 0013-7944, E-ISSN 1873-7315, Vol. 192, p. 1-11Article in journal (Refereed) Published
Abstract [en]

The fracture mechanics properties of injection-moulded low-density polyethylene (LDPE) sheets were investigated both experimentally and numerically. The total work of fracture was determined experimentally, by means of fracture mechanics testing of sheets of injection-moulded LDPE with side cracks of different lengths. A multi-specimen method, proposed by Kim and Joe (1987), was employed. The total work of fracture was estimated to 13 kJ/m(2). The experiments were simulated numerically using the finite element method. Crack growth was enabled by inclusion of a cohesive zone, and the constitutive response of this zone was governed by a traction-separation law. The local (or essential) work of fracture was estimated through numerical analyses, where the initiation of crack growth was simulated and the outcome was compared to the experimental results. The local (i.e. essential) work of fracture was estimated to 1.7 kJ/m(2), which is consistent with previous experimental measurements for the material in question. The total work of fracture, retrieved from the present experiments, agreed well with the far field values of the J-integral in the numerical analyses.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 192, p. 1-11
National Category
Polymer Technologies
Research subject
Technology (byts ev till Engineering)
Identifiers
URN: urn:nbn:se:lnu:diva-72216DOI: 10.1016/j.engfracmech.2018.02.004ISI: 000427628100001OAI: oai:DiVA.org:lnu-72216DiVA, id: diva2:1195140
Funder
Knowledge Foundation, 20150165Available from: 2018-04-04 Created: 2018-04-04 Last updated: 2018-04-06Bibliographically approved

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Kroon, Martin

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