UC Irvine

Abstract of the Dissertation

Multiscale Magneto-mechanical Coupling Framework of Magnetorheological Elastomer Composites By Shengwei Feng Doctor of Philosophy in Civil Engineering University of California, Irvine, 2024 Professor Lizhi Sun, Chair

This dissertation introduces a multiscale modeling and simulation framework for studying magnetorheological elastomer (MRE) composites, effectively bridging the gap between detailed microscopic modeling and experimental findings. Preliminary investigations focus on understanding the baseline magneto-mechanical properties of MREs, setting the stage for deeper inquiries into specific behaviors. Subsequent simulations integrate viscoelastic and hyperelastic properties to examine how the models respond under cyclic loading, with a particular focus on behavior that depends on magnetic field strength and strain variations. By scrutinizing microstructural influences such as particle distribution and interface conditions, the research elucidates how these factors affect MRE responses to magnetic fields and mechanical stresses. Modeling and simulations reveal that interface friction and particle dynamics are crucial in determining MREs' damping characteristics and overall stability. Notably, the study identifies how variations in interfacial interactions under different magneto-mechanical conditions significantly impact the performance and reliability of MRE composites. This comprehensive analysis deepens our understanding of MRE behavior and paves the way for optimizing the design and application of these smart materials in adaptive systems, potentially transforming their use in various industrial and technological sectors.