MagneticFieldInduced Normal Force of （MagneticFieldInduced正常的力量）.pdfVIP

Article pubs.acs.org/IECR Magnetic-Field-Induced Normal Force of Magnetorheological Elastomer under Compression Status Guojiang Liao, Xinglong Gong,* Shouhu Xuan, Chaoyang Guo, and Luhang Zong CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei, 230027, China ABSTRACT: The magnetic-field-induced normal force of magnetorheological elastomer (MRE) under compression status is studied in this paper. The influence of monotonic loading of the magnetic field, particle distribution, temperature, and cyclic loading of the magnetic field are investigated. The experimental results show that the normal force increases with increasing magnetic field and precompression force. For aligned MRE, the change of the magnetic-field-induced normal force is larger than that of isotropic MRE due to the special chainlike structure. When the temperature increases, the maximum change of the magnetic-field-induced normal force first increases and then decreases, due to the interaction of iron particles and the decreasing of the saturation magnetization of the carbonyl iron particles. If the magnetic field is circularly applied on the MRE, the normal force during unloading is smaller than that during loading due to the stress relaxation. 1. INTRODUCTION to explain the experimental results.23 Bica studied the com- Magnetorheological elastomer (MRE) belongs to a kind of pressibility modulus using the flat MRE-capacitor method.24 intelligent material whose rheological properties are controlled These researchers did enlightening studies on the compression rapidly by varying t