磁流变弹性体磁致力学性能的数值模拟研究

Numerical Simulation Research on Magnetic Mechanical Properties of Magnetorheological Elastomers

磁流变弹性体是一类将磁性敏感颗粒嵌入柔软橡胶基体中制成的新型磁敏高弹性智能材料.基于细观力学RVE(等效体积单元)方法,建立了磁流变弹性体的二维多链RVE,从理论分析和数值模拟两条主线,研究了磁流变弹性体的磁致压缩和磁致剪切力学性能,包括其磁致模量和磁场能量的变化情况,讨论了磁致模量的变化与能量转换之间的关系.通过对多链磁流变弹性体进行磁弹性耦合数值模拟,验证了外磁场的施加使得磁流变弹性体的初始压缩应力减小,剪切模量增大.

Magnetorheological Elastomers （MREs） are a kind of magneto-elastic smart materials which are compose of magneto-sensitive particles and soft elastomers. MREs have both advantages of magnetorheo- logical materials and elastomers, such as rapid response, excellent reversibility and strong controllable a- bility. Based on RVE（Representive Volume Element） in mesomechanics method, multi-chained RVE of MREs is built and the magneto-mechanical property of comression and shear is studied through theoretical analysis and modulus of magnetic phys filed ics coupling numerical simulation. These researches include magneto-induced energy as well as the relationship of the two variables. By magneto-elastic cou pling numerical simulation to multi-chained RVE of MREs, we draw the conclusion that the MREs＇ initial value of compression stress is decresed and shear modulus is increased due to magnetic field.