<div class="csl-bib-body">
<div class="csl-entry">Fischer, J.-T. (2018). <i>Quantification of microdamage formation during fatigue testing of individual trabeculae</i> [Diploma Thesis, Technische Universität Wien]. reposiTUm. https://doi.org/10.34726/hss.2018.46440</div>
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dc.identifier.uri
https://doi.org/10.34726/hss.2018.46440
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/7230
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dc.description
Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
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dc.description.abstract
siehe EN
de
dc.description.abstract
Osteoporosis is a widespread skeletal disease, which is a major problem of today's society. The current diagnosis and treatment of osteoporosis is based on the quantity of bone. Nevertheless, there is a growing awareness of the importance of the bone quality. Microdamage accumulation in bone may contribute to a loss in the quality of osteoporotic bone. The role of microdamage in fatigue fractures is widely unknown and the formation of microdamage in individual trabeculae under a dened uni-axial loading has not been performed so far. Therefore, this thesis investigated the quantication of microdamage formation in individual trabeculae under fatigue testing conditions in tension. A fatigue test protocol was developed and a stop criterion was dened to ensure microdamage formation without breaking the trabeculae. Several criteria were tested for this purpose. The decrease in elastic modulus, stress and strain amplitude and monitoring the whitening effect were excluded for various reasons. Nevertheless, with usage of a system with a higher resolution of the strain recording (temporal and local) it would be worthy to test these parameters further of their applicability. The number of cycles for which the samples were loaded and unloaded were chosen as stop criterion. Individual trabeculae were tested for 1500 (n=6), 2100 (n=6) and 3000 (n=7) cycles with a frequency of 1 Hz and an amplitude of 0.05 mm (whole sample). An adjusted preload was used to account for the variation in site of dierent sizes of trabeculae. The samples were stained with chelating agent Alizarin Red S before testing and with Calcein afterwards to show the formation of microdamage. Confocal laser scanning microscopy (CLSM) was used to investigate the samples and to visualize microdamage. Linear cracks and diuse damaged were detected in individual trabeculae after testing. By testing trabeculae for the mentioned dierent numbers of cycles the formation of microdamage was shown and the development of t
en
dc.language
English
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dc.language.iso
en
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
Biomechanik
de
dc.subject
Knochen
de
dc.subject
Biomechanics
en
dc.subject
Bone
en
dc.title
Quantification of microdamage formation during fatigue testing of individual trabeculae
en
dc.title.alternative
Quantifizierung des Mikroschadens in einzelnen Trabekelen während Materialermüdung
de
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.rights.license
In Copyright
en
dc.rights.license
Urheberrechtsschutz
de
dc.identifier.doi
10.34726/hss.2018.46440
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dc.contributor.affiliation
TU Wien, Österreich
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dc.rights.holder
Julia-Theresa Fischer
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dc.publisher.place
Wien
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tuw.version
vor
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tuw.thesisinformation
Technische Universität Wien
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dc.contributor.assistant
Thurner, Philipp
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tuw.publication.orgunit
E317 - Institut für Leichtbau und Struktur-Biomechanik