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Stress development of Carton Board Packages with Hill's Model Subjected to Concentrated Loads
Örebro University, School of Science and Technology, Örebro University, Sweden.
Örebro University, School of Science and Technology, Örebro University, Sweden.
2016 (English)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The work has been carried out mainly for Tetra Pak within the project "A New Model for Deformation of Carton boardPackages by Manual Handling". Tetra Pak is specialized in food packaging, its processing and distribution.

The purpose of this thesis was to implement a new carton board model for the finite element method which describes both the elastic and plastic deformation, this is called Hill’s model.This model is used to describe orthotropic materials, which a carton board is. Next, examine the differences that occurred in terms of principal stress and force-displacement diagram for different carton board packages when loaded with different objects. Simulations were performed in the finite element program Ansys APDL.

To start with, a literature study was performed to cover the theory of the problem, problem causes and other work carried out in the same area. Then the material model was constructed and the simulations were performed. After this, all the data was gathered and analyzes performed.

The introduction of the new material model was successful. The result shows how the carton board packages act until the maximum force the package can engage, in some cases also what happens after this state. The results also show how the principal stresses develop and the size of these.

Abstract [sv]

Examensarbetet har utförts för i huvudsak Tetra Pak inom projektet "A New Model for Deformation of Carton Board Packages by Manual Handling". Tetra Pak är specialister på livsmedelsförpackningar, dess bearbetning och distribution.

Syftet för detta examensarbete var att införa en kartongmodell för finita elementmetoden som beskriver både elastiskt och plastiskt tillstånd, denna kallas Hills modell. Modellen används för att beskriva ortotropa material, vilket kartong är. Därefter undersöka skillnader som uppstod vad gäller huvudspänningar och kraftförskjutningsdiagram för olika kartongförpackningar när dessa utsattes för olika tryckande objekt. Simuleringar utfördes i finita elementprogrammet, Ansys APDL.

Till att börja med utfördes en litteraturstudie för att täcka teorin om problemet, problemorsaker och andra utförda arbeten inom samma område. Därefter gjordes materialmodellen var på simuleringarna utfördes. Efter detta samlades all data in och analyser utfördes.

Införandet av den nya materialmodellen lyckades. Resultatet visar hur kartongförpackningarna agerar fram till den maximala kraften som förpackningen kan ta upp, i vissa fall även vad som händer efter detta tillstånd. Resultaten visar också hur huvudspänningarna utbreder sig och storleken på dessa.

Place, publisher, year, edition, pages
2016.
Keyword [en]
carton board, Hill’s model, finite element method, grip stiffness model
Keyword [sv]
kartong, Hills modell, finita element i greppstyvhetmetod, greppstyvhet
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:oru:diva-52374OAI: oai:DiVA.org:oru-52374DiVA: diva2:971985
Subject / course
Mechanical Engineering
Supervisors
Examiners
Available from: 2016-09-19 Created: 2016-09-19 Last updated: 2016-09-19Bibliographically approved

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School of Science and Technology, Örebro University, Sweden
Mechanical Engineering

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