CAJ | 학술논문

采用主要成分为高粘度线性聚硅氧烷的弹性胶泥为基体,制备了羰基铁粉质量分数为20％,40％和60％的磁流变胶泥.对磁流变胶泥的流变学特性和动态力学特性进行测试,描述了磁流变胶泥的本构关系并识别其参数,分析了磁场、铁粉含量、剪切应变以及剪切频率对粘弹性能的影响.结果表明,磁流变胶泥的本构关系能用 Herschel-Bulkley 模型进行描述；剪切应力、刚度的磁场可控范围宽(铁粉质量分数为60％的磁流变胶泥剪切应力调节范围16~128 kPa,储能模量可调范围0．52~3．28 MPa)；随铁粉含量和磁场的增加,剪切应力增大、弹性增加而粘性减小；不同磁场下磁流变胶泥从线性粘弹性区向非线性粘弹性区转变的临界应变值不同,且磁场增大可拓宽线性粘弹性区的范围；在线性粘弹性区磁流变胶泥对0~80 Hz频率无依赖性.
채용주요성분위고점도선성취규양완적탄성효니위기체,제비료탄기철분질량분수위20％,40％화60％적자류변효니.대자류변효니적류변학특성화동태역학특성진행측시,묘술료자류변효니적본구관계병식별기삼수,분석료자장、철분함량、전절응변이급전절빈솔대점탄성능적영향.결과표명,자류변효니적본구관계능용 Herschel-Bulkley 모형진행묘술；전절응력、강도적자장가공범위관(철분질량분수위60％적자류변효니전절응력조절범위16~128 kPa,저능모량가조범위0．52~3．28 MPa)；수철분함량화자장적증가,전절응력증대、탄성증가이점성감소；불동자장하자류변효니종선성점탄성구향비선성점탄성구전변적림계응변치불동,차자장증대가탁관선성점탄성구적범위；재선성점탄성구자류변효니대0~80 Hz빈솔무의뢰성.
Elasticity cement consisting of high viscosity linear polysiloxane based magnetorheological elasticity cement (MEC)with 20%,40% and 60% weight fraction of carbonyl iron powder were prepared.Magnetorheo-logical rheological properties and dynamic mechanical properties were systematically tested.The constitutive re-lation and parameters of MEC were identified.The relationship of viscoelastic properties with magnetic field,i-ron powder content,shear strain and shear frequency were analyzed.The results demonstrated that the consti-tutive relation of MEC can be described using a Herschel-Bulkley model.The shear stress and stiffness of MEC with 60% weight fraction of carbonyl iron powder can be controlled by magnetic field with a wide range (for ex-ample,adjustable range of shear stress was from 16 kPa to 128 kPa,adjustable range of storage modulus was from 0.52 MPa to 3.28 MPa).The shear stress increased,the elasticity increased and the viscosity decreased with the iron mass fraction and magnetic field increasing.The critical strain,which was from the linear viscoe-lastic region to nonlinear viscoelastic area,was different at various magnetic field.The range of the linear visco-elastic region can be broaden with the magnetic field increasing.Magnetorheological elasticity cement was inde-pendent of frequency (0-80 Hz)in the linear viscoelastic range.