Nonlinear viscoelastic model for time-dependent mechanical characterization of PMMA acrylic bone cements

Mário Vargas Ceron; Diogo Lira Cecílio; Renato Vaz Linn; Samir Maghous

doi:10.1016/j.jmbbm.2023.106126

Nonlinear viscoelastic model for time-dependent mechanical characterization of PMMA acrylic bone cements

J Mech Behav Biomed Mater. 2023 Nov:147:106126. doi: 10.1016/j.jmbbm.2023.106126. Epub 2023 Sep 19.

Authors

Mário Vargas Ceron¹, Diogo Lira Cecílio¹, Renato Vaz Linn², Samir Maghous¹

Affiliations

¹ Graduate Program in Civil Engineering PPGEC/UFRGS, 99 Osvaldo Aranha Ave, 3rd floor, 90035-190, Porto Alegre, RS, Brazil.
² Graduate Program in Civil Engineering PPGEC/UFRGS, 99 Osvaldo Aranha Ave, 3rd floor, 90035-190, Porto Alegre, RS, Brazil. Electronic address: renatolinn@ufrgs.br.

PMID: 37741182
DOI: 10.1016/j.jmbbm.2023.106126

Abstract

Acrylic bone cement materials are widely used in prosthetic implants, orthopaedics and others trauma surgery. From the mechanical constitutive behaviour viewpoint, experimental analyses have provided ample evidence that such materials exhibit time-dependent properties. In this context, this work addresses the formulation of a nonlinear viscoelastic model for the behaviour of PMMA bone cements under compressive creep loading. Relying upon experimental data available for four PMMA bone cement types, a nonlinear Burgers-like rheological model is formulated and related parameters calibrated for the mechanical description of the time-dependent behaviour of these materials under isothermal conditions and one dimensional setting. The proposed model reveals relevant in reproducing both instantaneous and delayed properties of studied PMMA bone cements.

Keywords: Acrylic bone cements; Burgers model; Creep; Viscoelasticity.