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Topologioptimering för jämn lastfördelning i skruvförband
KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Optimization and Systems Theory.
2015 (Swedish)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Topology optimization for even load distribution in bolted joints (English)
Abstract [sv]

Vanligtvis ställs topologioptimeringsproblem upp så att en strukturs komplians minimeras under bivillkor på volymen som den får uppta. I skruvförband med flera ingående skruvar innebär detta ofta att lasten fördelas ojämnt mellan skruvarna och att förbandet med det optimerade fästet ändå går sönder. Fyra problemformuleringar för att erhålla en jämnare fördelning av lasten över de ingående skruvarna har undersökts på två olika förband, ett litet med två skruvar och ett större med sex skruvar. Förbanden utsätts för två respektive tre lastfall och är modellerade med skruvar som förspänns. Metoderna är undersökta med hjälp av topologioptimeringsprogrammet Tosca från FE-DESIGN och FEM-programmet Abaqus från Dassault Systèmes Simulia på Scania CV AB. Tre av problemformuleringarna visade sig vara rimliga metoder att använda.

Abstract [en]

Usually topology optimization problems are posed so that the compliance of a structure is minimized under condition on the volume. In a joint containing several screws the result is often that the load is unevenly divided among the screws and the joint with the optimized bracket brakes anyway. In this master thesis four different formulations of the topology optimization problem with the purpose of obtaining an even distribution of the load among the screws have been investigated on two different joints, one smaller with two screws and one larger with six screws. The joints are exposed to two and three loadcases respectively and modeled with pretensioned screws. The methods are investigated with the topology optimization program Tosca by FE-DESIGN and the FEM program Abaqus by Dassault Systèmes Simulia at Scania CV AB. Three of the formulations are shown to be reasonable to use.

Place, publisher, year, edition, pages
2015.
Series
TRITA-MAT-E, 2015:84
National Category
Computational Mathematics
Identifiers
URN: urn:nbn:se:kth:diva-177988OAI: oai:DiVA.org:kth-177988DiVA: diva2:875212
External cooperation
Scania CV AB
Subject / course
Optimization and Systems Theory
Educational program
Master of Science - Applied and Computational Mathematics
Supervisors
Examiners
Available from: 2015-11-30 Created: 2015-11-30 Last updated: 2015-11-30Bibliographically approved

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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  • de-DE
  • en-GB
  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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