MICROCRACK EVOLUTION IN MICROINDENTATION OF OVINE CORTCAL BONE INVESTIGATED WITH TIME LAPSED SRµCT

Abstract : Skeletal diseases such as osteoporosis constitute a seri-ous socio-economic burden in aging societies. Patient specific tissue strength estimation could be helpful for personalised treatment strategies. Reference point in-dentation (RPI) [1] that derives from instrumented in-dentation [2] has been proposed. With imprints of sev-eral 100 μm at indentation depths of ~80 μm several structural units are affected. It is necessary to better un-derstand the processes under the indenter tip but studies investigating the impact of larger indenters are currently missing. Combining high resolution imaging with in situ microindentation could help to investigate the zone un-derneath the indenter and observe emerging cracks. We aimed at (i) combining microindentations with synchro-tron radiation micro-computed tomography (SRμCT) to investigate (ii) crack systems under two different indent-ers (iii) in axial or transverse testing direction.
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Uwe Wolfram, Jakob Schwiedrzik, Alexander Bürki, Alexander Rack, Cécile Olivier, et al.. MICROCRACK EVOLUTION IN MICROINDENTATION OF OVINE CORTCAL BONE INVESTIGATED WITH TIME LAPSED SRµCT. 23rd Congress of the European Society of Biomechanics (ESB 2017), Jul 2017, Seville, Spain. ⟨hal-01598203⟩

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