Abstract
Dog-bone specimens of compact bovine femur were loaded in tension in a multipurpose tensile testing system (MTS) under cross-head speeds ranging from 0.5 to 10 mm/min and a split-hopkinson pressure bar (SHPB) with strain rates up to 800 sā1. To examine the micro-cracks induced in the specimens during the fracture process, a high speed camera (Phantom V12) with a cold light source was used to capture the light illumination of the micro-cracks by use of strong light scattering effects. Images obtained from the high speed camera clearly showed the micro-cracks, which exhibited more light intensity compared to the surface without micro-cracks. The high speed images were synchronized to the stress-strain curves. It was found that micro-cracks were induced immediately after the specimen started to yield. The specimens with more micro-cracks exhibited higher energy-absorption capacity. Through the present optical technique, the toughening effects of micro-cracks on the overall mechanical properties have been studied for the first time on a macroscopic level.
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Ā© 2013 The Society for Experimental Mechanics, Inc.
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Tekalur, S.A., Zhang, W., Vanderklok, A. (2013). Visualization of Micro-cracks in Compact Bovine Bone. In: Prorok, B., et al. Mechanics of Biological Systems and Materials, Volume 5. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4427-5_8
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DOI: https://doi.org/10.1007/978-1-4614-4427-5_8
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