重庆大学学报2024，Vol.47Issue(12)：1-12,12.DOI:10.11835/j.issn.1000-582X.2024.059
铁粉含量对磁流变弹性体滞回特性的影响及参数模型研究
Effect of iron powder content on the hysteretic characteristics of magnetorheological elastomers and parametric model study
摘要
Abstract
This study fabricates magnetorheological elastomer(MRE)samples with iron particle contents of 10%,30%,60%,and 75%,investigating how iron particle content influences the static and dynamic properties of MREs through experimental tests.Results show a positive correlation between increasing iron particle content and both tensile strength and elongation at break,although excessively high content leads to reduced mechanical properties.In terms of damping and hysteresis performance,higher iron particle content significantly improves maximum damping force,equivalent stiffness,storage modulus,and dissipated energy,displaying a distinct nonlinear trend.Additionally,the influence of loading frequency on material properties exhibited complex nonlinear and coupling effects.The study employes the Bouc-Wen model combined with a genetic algorithm to identify parameters of the material's nonlinear hysteretic characteristics,achieving a strong fit.Comprehensive analysis identifies the sample with 60%iron particle content as having the best damping and energy dissipation performance across various conditions.These findings reveal the correlation between iron particle content and MRE properties,providing a theoretical foundation for the development and optimization of MREs.关键词
磁流变弹性体/羟基铁粉/力学性能/滞回曲线/Bouc-Wen模型Key words
magnetorheological elastomers/carbonyl iron powder/mechanical properties/hysteresis curve/Bouc-Wen model分类
建筑与水利引用本文复制引用
马乾瑛,李帅,佟翔鹏,李裕..铁粉含量对磁流变弹性体滞回特性的影响及参数模型研究[J].重庆大学学报,2024,47(12):1-12,12.基金项目
国家自然科学基金(51208041) （51208041）
陕西省自然科学基金(2020SF-382,2014JM2-5080). Supported by National Natural Science Foundation of China(51208041),and Natural Science Foundation of Shaanxi Province(2020SF-382,2014JM2-5080). （2020SF-382,2014JM2-5080）
