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Scratch test experiments on cortical bone: (a) digital photo of a scratch test being conducted on cortical bone. Credits - Amrita Kataruka, Kavya Mendu and Ange-Therese Akono, UIUC, 2016. (b) Schematic of scratch test on LT specimen; probing in this orientation generates fracture surfaces in the transverse direction. (c) Schematic of scratch test on SL specimen; probing in this orientation creates fracture surfaces parallel to the long axis of bone.
