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INFLUENCE OF RELATIVE STRENGTH OF CONSTITUENTS ON THE OVERALL STRENGTH AND TOUGHNESS OF BONE

S. ANUP

Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai-600036, India

Corresponding author.

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S. M. SIVAKUMAR

Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai-600036, India

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, and

G. K. SURAISHKUMAR

Department of Biotechnology, Indian Institute of Technology Madras, Chennai-600036, India

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https://doi.org/10.1142/S0219519408002747Cited by:6 (Source: Crossref)

Abstract

Biocomposites such as bone exhibit synergistic superior mechanical properties compared to its constituents, protein (collagen) and mineral (hydroxyapatite). The importance of properties of constituents at the submicron scale with regard to the toughness and strength of bone is investigated employing a discrete lattice model. The results show that matrix failure as opposed to platelet breakage provides better toughness to the bone. There is a fairly sudden increase in the toughness of bone when the strength of mineral platelet to that of protein crosses a particular critical value. These could provide clues to the preparation of ultra-tough artificial composites and the treatment of diseases related to fragility of bone.

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