Determination of poroelastic properties of cartilage using constrained optimization coupled with finite element analysis

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题名:	Determination of poroelastic properties of cartilage using constrained optimization coupled with finite element analysis
作者:	鍾禎元;Chung, Chen-Yuan;Mansour, Joseph M.
贡献者:	工學院機械工程學系
关键词:	Cartilage, Articular;Constraints;Deviation;Elasticity;Feasibility Studies;Finite Element Analysis;Finite element method;Joining;Materials Testing;Mathematical analysis;Mathematical models;Optimization;Porosity;Robustness;Stress relaxation;Stress, Mechanical
日期:	2015-02-01
上传时间:	2026-04-23 14:58:08 (UTC+8)
出版者:	Elsevier BV;Netherlands
摘要:	摘要： The feasibility of determining biphasic material properties using a finite element model of stress relaxation coupled with two types of constrained optimization to match measured data was investigated. Comparison of these two approaches, a zero-order method and a gradient-based algorithm, validated the predicted material properties. Optimizations were started from multiple different initial guesses of material properties (design variables) to establish the robustness of the optimization. Overall, the optimal values are close to those found by Cohen et al. (1998) but these small differences produced a marked improvement in the fit to the measured stress relaxation. Despite the greater deviation in the optimized values obtained from the zero-order method, both optimization procedures produced material properties that gave equally good overall fits to the measured data. Furthermore, optimized values were all within the expected range of material properties. Modeling stress relaxation using the optimized material properties showed an excellent fit to the entire time history of the measured data. 其他題名： J Mech Behav Biomed Mater 出版者： Netherlands 出版日期： 2015-02-01 出處： Journal of the mechanical behavior of biomedical materials, 2015-02, Vol.42, p.10-18 版權： Copyright © 2014 Elsevier Ltd. All rights reserved. 版權： 2014 Elsevier Ltd. All rights reserved. 2014 識別號： ISSN: 1751-6161 識別號： ISSN: 1878-0180 識別號： EISSN: 1878-0180 識別號： DOI: 10.1016/j.jmbbm.2014.10.007 識別號： PMID: 25460921
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