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Mechanical characterisation of bear bones
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.).
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Brown bears go into hibernation for several months during the winter period,but regain all bodily functions shortly after waking up, such as the strength ofbones. The aim of this thesis has been to characterise the material of activebear’s bones (tibiae) by destructive testing and then fitting a damage modelby the use of finite element simulations. Standard beam theory was used tocompare with the simulated results and supplemental compression testing wasconducted to verify elastic parameters. Examination of results show quite alarge distribution in both material parameters and determined stresses for thetested bones, with elastic moduli varying 3-10 GPa, Poisson’s ratio 0.3-0.45,strain for onset of damage 1-2%, damage rate factor of 25-40 and fracturestresses varying proportionally with stiffness between 50-190 MPa.

Place, publisher, year, edition, pages
2019. , p. 50
Series
TRITA-SCI-GRU ; 283
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-254598OAI: oai:DiVA.org:kth-254598DiVA, id: diva2:1333978
Subject / course
Solid Mechanics
Supervisors
Examiners
Available from: 2019-07-02 Created: 2019-07-02 Last updated: 2019-07-02Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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Language
  • de-DE
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  • en-US
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  • nn-NB
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  • Other locale
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Output format
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