CAJ | 학술논문

在无外磁场条件下以硅橡胶为基体，夹杂不同体积分数的微米级磁性羰基铁粉颗粒，经过室温硫化等过程，制备了羰基铁粉/硅橡胶磁性复合薄片材料，并对其在无外磁场以及磁场加载下开展了拉伸力学性能的测试与分析。结果表明，外加磁场增强了该类磁性复合软材料的力学性能；其拉伸强度、拉伸模量随夹杂体积分数的增大显著增强，断裂伸长率随羰基铁粉颗粒夹杂体积分数的增加出现先增大后减小的特征与趋势。通过对无外场与磁场下磁性颗粒复合软材料的实验测试与对比分析发现，羰基铁粉/硅橡胶磁性复合软材料的力学行为仍表现为与单一高分子聚合物基体材料类似的超弹性行为，含有较少参数的修正Mooney-Rivlin 超弹性模型能够较好地描述其应力-应变关系，为该类磁性智能复合软材料的工程应用、力学性能与行为表征研究提供了可能的便捷分析途径与方法。
재무외자장조건하이규상효위기체，협잡불동체적분수적미미급자성탄기철분과립，경과실온류화등과정，제비료탄기철분/규상효자성복합박편재료，병대기재무외자장이급자장가재하개전료랍신역학성능적측시여분석。결과표명，외가자장증강료해류자성복합연재료적역학성능；기랍신강도、랍신모량수협잡체적분수적증대현저증강，단렬신장솔수탄기철분과립협잡체적분수적증가출현선증대후감소적특정여추세。통과대무외장여자장하자성과립복합연재료적실험측시여대비분석발현，탄기철분/규상효자성복합연재료적역학행위잉표현위여단일고분자취합물기체재료유사적초탄성행위，함유교소삼수적수정Mooney-Rivlin 초탄성모형능구교호지묘술기응력-응변관계，위해류자성지능복합연재료적공정응용、역학성능여행위표정연구제공료가능적편첩분석도경여방법。
In this study,we present the fabrication of thin sheets of magnetic composite materials by organized different volume fraction micron-sized carbonyl iron powder inside RTV-2 silicon rubber in the absence of mag-netic field.The tensile mechanical properties of the composites with/without magnetic field were tested utilized the mechanical-magnetic-thermal multi-field instrument and analyzed by some super-elastic models.The results indicated that the mechanical performance of this kind of magneto-active composites was obviously enhanced by applying uniform external magnetic field.The tensile strength and young’s modulus of the composites signifi-cantly increase and its elongation rate at break increases firstly and then reduces with further increase in the vol-ume fraction of particles inclusion.By means of comparison between the experiment data and modeling simula-tions for the composite in conditions of zero field and an applied magnetic field,it was found that its mechanical behaviors manifest super-elastic characteristic similar to the common super-elastic rubber.The stress-strain re-lationship can be described satisfactorily by Mooney-Rivlin model with fewer modeling parameters,which may offer convenient approach for mechanical properties and behavior analysis of such soft magnetic composite in en-gineering applications.