Effect of Cyclic Deformation on Magnetorheological Elastomers  

循环加载对磁流变弹性体性能的影响

作　　者：张玮[1] 龚兴龙[1] 孙桃林[1] 范艳层[1] 江万权 

机构地区：[1]中国科学技术大学近代力学系,合肥230027 [2]中国科学技术化学系,合肥230026

出　　处：《Chinese Journal of Chemical Physics》2010年第2期226-230,I0002,共6页化学物理学报（英文）

摘　　要：Fatigue properties of magnetorheological elastomer （MRE） samples were investigated based on cis-polybutadiene rubber by using a fatigue test machine. Three MRE samples with iron particles mass fraction of 60%, 70%, and 80% were fabricated, and their properties dependence of three strain amplitudes （50%, 75%, and 100%） were measured. The absolute magnetorheological （MR） effect, storage modulus, and loss modulus of MRE samples after fatigue were evaluated by a modified dynamic mechanical analyzer. The results revealed that MR effect, storage modulus, and loss modulus of MREs containing 80% iron particles depended strongly on the strain amplitudes and the number of cycles, while storage mod-ulus and loss modulus of MREs containing 70% iron particles also depended on the strain amplitudes and the number of cycles but not as strongly as sample which contains 80% iron particles, but the properties of MREs containing 60% iron particles after cyclic deforma-tion were almost independent of the fatigued conditions. In order to investigate the fatigue mechanism of MREs, the sample was carried out with a quasi-static tensile testing and its surface morphology during testing was observed in situ by scanning electron microscopy.

关 键 词：Magnetorheological elastomer Fatigue cis-polybutadiene rubber In situ observation 

分 类 号：O[理学]