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Ergonomi och taktilitet: simulering av en fingertopp
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2008 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Tactility – fingertip simulation (English)
Abstract [sv]

En 3D FE-modell av en fingertopp har skapats i simuleringsprogrammet Ansys. Fingertoppens tre hudlager; hypodermis, dermis samt epidermis har modellerats med mått och dynamiska egenskaper baserade på publicerade studier. Kontakten mellan fingertopp och en aluminiumplatta simulerades, där egenuppmätta värden användes för friktionstal och normalkraft. Simuleringar av tre belastningsfall gjordes för att utvärdera FE-modellen: • Enbart tryckkraft i aluminiumplattans normalriktning. • Tryckkraft i normalriktning samt kraft i aluminiumplattans längdriktning. • Tryckkraft i normalriktning samt förflyttning av aluminiumplattan i längdriktning. Deformation till följd av belastningarna utvärderades och en rimlighetsanalys gjordes, varefter resultatet jämfördes med tidigare rapporter. Slutsatsen drogs att modellen inte kunde verifieras då friktionen i kontakten mellan finger och platta troligen är felaktigt modellerad. För skapande av en acceptabel modell fodras ytterligare kunskap om hudlagrens dynamiska egenskaper.

Abstract [en]

A 3-dimensional FE-model of a fingertip has been created in the simulation program Ansys. The geometrical properties and dynamical behavior of the three skin layers hypodermis, dermis and epidermis were taken from published studies and reports of earlier FE-models. The contact between the fingertip and a plate was simulated with friction coefficient and normal force from own measurements. Three simulations were made to evaluate the FE-model: • Normal force. • Normal force and a tangential force in the plate’s length direction. • Normal force and a tangential displacement of the plate in its length direction. The deformation was evaluated and the results were compared to results from earlier studies. The FE-model could not be verified since the contact friction between finger and plate probably has been modelled incorrectly. Further knowledge of the dynamic properties of the skin is needed to create an acceptable model.

Place, publisher, year, edition, pages
2008.
Series
MMKB 2008:1 MKNB 014
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-171960OAI: oai:DiVA.org:kth-171960DiVA: diva2:844968
Available from: 2015-10-20 Created: 2015-08-10 Last updated: 2015-10-20Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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