Damage mechanisms in bioactive glass matrix composites under uniaxial compression. (March 2018)

• Record Type: Journal Article
• Authors: Jiang, Qifeng; Ismail, Jewan; Zaïri, Fahmi; Qu, Zhengwei; Liu, Xiaobing; Zaïri, Fahed
• Is Part Of: Journal of the mechanical behavior of biomedical materials. Volume 79(2018)
• Page Start: 264
• Page End: 272
• Publication Date: 2018-03
• Subjects: Bioactive glass -- Composites -- Computational homogenization -- Continuum damage mechanics -- Damage mechanisms; Biomedical materials -- Periodicals; Biomedical materials -- Mechanical properties -- Periodicals; Biomedical materials; Biomedical materials -- Mechanical properties; Periodicals; Electronic journals; 610.28
• DOI: 10.1016/j.jmbbm.2017.12.020
• Languages: English
• ISSNs: 1751-6161

Abstract

Abstract: The damage and crack resistance improvement of bioactive glass is of prime importance, particularly when applied to the repair of load-bearing bones. The present contribution is focused on the prediction of damage mechanisms and crack resistance under uniaxial compression of bioactive glass matrix composites reinforced with a particulate phase. In order to characterize the effects of voids and particles on the damage mechanisms and the macro-response, a two-step homogenization is performed by considering the two phases existing at two different scales: micro/meso through the homogenization of the porous matrix and then meso/macro through the periodic micro-field approach. The damage in the bioactive glass matrix is computed via an anisotropic stress-based damage model, implemented into a finite element program. Failure resulting of excessive damage accumulation in the bioactive glass matrix is predicted by a critical damage criterion combined with a vanishing element technique. The implication of particles in the toughening mechanism as well as the damage and crack resistance improvement in this class of porous biomaterials is highlighted via a parametric study using the proposed numerical model.