Diffuse damage accumulation in the fracture process zone of human cortical bone specimens and its influence on fracture toughness

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Parsamian, Gagik P.¹; Norman, Timothy L.¹

Diffuse damage accumulation in the fracture process zone of human cortical bone specimens and its influence on fracture toughness

J Mater Sci Mater Med. September 2001;12(9):779-783

©2001 Kluwer Academic Publishers

Affiliations

¹Musculoskeletal Research Center, Departments of Mechanical and Aerospace Engineering and Orthopedics, West Virginia University, Morgantown, WV, 26506-9196, USA
Abstract

This study was concerned with the mechanics and micromechanisms of diffuse (ultrastructural) damage occurrence in human tibial cortical bone specimens subjected to tension–tension fatigue. A nondestructive technique was developed for damage assessment on the surfaces of intact compact tension specimens using laser scanning confocal microscopy. Results indicated that diffuse damage initiates as a result of fractures in the inter-canalicular regions. Subsequent growth of those microscopic flaws demonstrated multiple deflections from their paths due to 3D spatial distribution of microscopic porosities (lacunae–canalicular porosities) and the stress-concentrating effects of lacunae. Damage dominating effects in the early stages of fatigue had been verified by the observed variations of the fracture toughness due to artificially induced amounts of damage. Toughening behavior was observed as a function of diffuse damage.
Links

DOI: 10.1023/A:1017916800421

PubMed: 15348224

WoS: 000170954700005
History

Received: 2000-06-12

Accepted: 2000-07-28

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2006	Joo W. Cross-Modal Effects of Damage on Mechanical Behavior of Human Cortical Bone [PhD thesis]. Cleveland, OH: Case Western Reserve University; January 2006.
2020	Mehraban Alvandi L. Diffuse Damage Repair Mechanism in Bone [PhD thesis]. New York, NY: The City College of New York; 2020.
2015	Brock GR Jr. Changes in Bone Tissue Properties With Osteoporosis Treatment [PhD thesis]. Ithaca, NY: Cornell University; January 2015.
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2006	Diab T. The Role of Damage Morphology in Age-Related Increase in Bone Fragility [PhD thesis]. Troy, NY: Rensselaer Polytechnic Institute; 2006.
2021	Frank M. Mechanical Characterization of Individual Trabeculae [PhD thesis]. Vienna University of Technology; February 2021.
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2001	Parsamian GP. Damage Mechanics of Human Cortical Bone [PhD thesis]. West Virginia University; 2001.