Mechanical properties of cortical bones related to temperature and orientation of Haversian canals

Ma, Zhichao; Qiang, Zhenfeng; Zhao, Hongwei; Piao, Hulin; Ren, Luquan

Affiliations

¹School of Mechanical and Aerospace Engineering, Jilin University, Changchun, People’s Republic of China

²Key Laboratory of CNC Equipment Reliability, Ministry of Education, Changchun, People’s Republic of China

³Key Laboratory of Bionic Engineering, Ministry of Education, Changchun, People’s Republic of China

⁴Department of Cardiovascular Surgery, Second Hospital of Jilin University, Changchun, People’s Republic of China

Abstract and keywords

The understanding of mechanical performances and microscopic failure mechanisms of cortical bones under service condition is necessary prerequisite of fracture prevention, which would support the development of bone tissue engineering and design of bionic bones. By using miniaturized horizontal in situ compression tester, the effects of both temperature and sampling orientations on the compressive strengths and fracture morphologies were investigated. The significant difference between fracture strengths and compressive strains at various temperatures indicated that the cortical bone was sensitive to temperature. Direct experimental evidences revealed the gradually fibrotic trend of fracture surfaces as a function of sampling orientation. Through the Haversian canals distribution analysis, the relationship between the distribution of Haversian canals and fracture path was established. Essentially, the competition between high density Haversian canals and stress concentration factor determines the initiation and propagation of cracks.

Keywords: mechanical properties; cortical bones; bone mechanics; compressive test; fracture

Links

DOI: 10.1088/2053-1591/ab6899

WoS: 000521088600001

History

Received: 2019-11-18

Revised: 2019-12-24

Accepted: 2020-01-07

Online: 2020-01-20

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