Post-yield relaxation behavior of bovine cancellous bone

Burgers, Travis A.<sup>1</sup>; Lakes, Roderic S.<sup>2,3</sup>; García-Rodríguez, Sylvana<sup>1</sup>; Piller, Geoffrey R.<sup>1</sup>; Ploeg, Heidi-Lynn<sup>1,3</sup>

Affiliations

¹Department of Mechanical Engineering, University of Wisconsin—Madison, Madison, WI, United States

²Department of Engineering Physics, University of Wisconsin—Madison, Madison, WI, United States

³Department of Biomedical Engineering, University of Wisconsin—Madison, Madison, WI, United States

Abstract and keywords

Relaxation studies were conducted on specimens of bovine cancellous bone at post-yield strains. Stress and strain were measured for 1000 s and the relaxation modulus was determined. Fifteen cylindrical, cancellous bone specimens were removed from one bovine femur in the anterior–posterior direction. The relaxation modulus was found to be a function of strain. Therefore cancellous bone is non-linearly viscoelastic/viscoplastic in the plastic region. A power law regression was fit to the relaxation modulus data. The multiplicative constant was found to be statistically related through a power law relationship to both strain (p<0.0005) and apparent density (p<0.0005) while the power coefficient was found to be related through a power law relationship, E(t, ε)=A(ε)t^−n(ε), to strain (p<0.0005), but not apparent density.

Keywords: Cancellous bone; Bovine; Post-yield; Relaxation; Viscoelastic

Links

DOI: 10.1016/j.jbiomech.2009.08.005

PubMed: 19765712

WoS: 000273135200016

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Cited By (1)

Year	Entry
2022	Khakpour S. Multi-Component Finite Element Analysis of Low- Energy Acetabular Fracture: Computational Study of Pelvic Girdle Fracture Mechanism [PhD thesis]. University of Oulu; 2022.