摘要
磁流变塑性体是一种新型磁流变材料,主要是由软磁性颗粒均匀分散在塑性聚氨酯基体中开发而成的,具有较好的抗颗粒沉降能力。其类似于磁流变液的磁致流变效应使得其在诸多工程领域具有较大的应用潜力。系统测试了频率对磁流变塑性体动态滞回响应,结果发现,在所有频率下磁流变塑性体的滞回曲线具有明显的非线性特性,并表现出应变增强效应。此外,利用遗传算法,基于粘-弹-塑性模型对不同频率下得到的滞回曲线进行参数建模并对模型参数展开识别,发现粘-弹-塑性模型能够精确描述不同频率下的材料动态滞回响应。
Magnetorheological plastomer(MRP)is a new type of magnetorheological material,which is mainly developed by dispersing soft magnetic particles evenly in the plastic polyurethane matrix.Its magnetorheological effect similar to that of magnetorheological fluid makes it have potential application in many engineering fields.In this paper,the frequency response to the dynamic hysteresis of MR plastomer body is systematically tested.It is found that the hysteresis curve of MR plastomer body has obvious nonlinear characteristics and shows strain enhancement effect at all frequencies.In addition,based on the viscoelastic plastic model,the parameters of hysteretic curves under different frequencies are modeled and identified by genetic algorithm.It is found that the viscoelastic plastic model can accurately describe the dynamic hysteretic response of materials at different frequencies.
作者
罗肖培
LUO Xiaopei(Hebei Chemical&Pharmaceutical Vocational Technology College,Shijiazhuang,Hebei 050026,China)
出处
《贵州师范大学学报（自然科学版）》
CAS
2021年第6期62-67,共6页
Journal of Guizhou Normal University：Natural Sciences
基金
河北省教育厅青年基金项目(QN2018206)。
关键词
磁流变塑性体
动态滞回曲线
粘-弹-塑性模型
遗传算法
magnetorheological plastomer
dynamic hysteresis curve
viscoelastic plastic model
genetic algorithm
