Yan Li , Bochao Wang , Huaxia Deng , Xinglong Gong
{"title":"Experimental characterization of cyclic stress softening for isotropic soft magnetorheological elastomer","authors":"Yan Li , Bochao Wang , Huaxia Deng , Xinglong Gong","doi":"10.1016/j.polymer.2025.129050","DOIUrl":null,"url":null,"abstract":"<div><div>Soft magnetorheological elastomer (s-MRE) is fabricated by dispersing magnetic particles within the elastomer matrix. Its mechanical properties dramatically change under the applied magnetic field, exhibiting a typical magnetorheological (MR) effect. This property provides s-MRE with the potential for application in vibration control. During vibration control application scenarios, s-MRE-based vibration control devices are often subjected to asymmetric cyclic loads, for instance, the structure’s self-weight and dynamic loads (e.g., wind or traffic loads), which result in a decay of the stress response with cyclic loading (mainly short cycle loading), referred to as the cyclic stress softening. If the influence of cyclic stress softening is ignored, the evaluation of s-MRE-based vibration control devices may exhibit unwarranted optimism and lack sufficient reliability, which may cause safety hazards. However, a literature review reveals limited investigation on the cyclic stress softening of s-MRE. To address this research gap and enhance the performance evaluation of s-MRE-based devices, this work experimentally characterizes the influence of mechanical loads and magnetic fields on the cyclic stress softening of isotropic s-MRE. The test results indicate that peak strain plays a dominant role in the occurrence of cyclic stress softening and an increased strain rate further amplifies this effect. Furthermore, the presence of a magnetic field positively influences the mechanical behaviour of isotropic s-MRE and concurrently intensifies the cyclic stress softening effect. This research enhances the understanding of the cyclic stress softening in s-MRE, thereby benefiting the long-term advancement of s-MRE-based development and design.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"338 ","pages":"Article 129050"},"PeriodicalIF":4.5000,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032386125010365","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Soft magnetorheological elastomer (s-MRE) is fabricated by dispersing magnetic particles within the elastomer matrix. Its mechanical properties dramatically change under the applied magnetic field, exhibiting a typical magnetorheological (MR) effect. This property provides s-MRE with the potential for application in vibration control. During vibration control application scenarios, s-MRE-based vibration control devices are often subjected to asymmetric cyclic loads, for instance, the structure’s self-weight and dynamic loads (e.g., wind or traffic loads), which result in a decay of the stress response with cyclic loading (mainly short cycle loading), referred to as the cyclic stress softening. If the influence of cyclic stress softening is ignored, the evaluation of s-MRE-based vibration control devices may exhibit unwarranted optimism and lack sufficient reliability, which may cause safety hazards. However, a literature review reveals limited investigation on the cyclic stress softening of s-MRE. To address this research gap and enhance the performance evaluation of s-MRE-based devices, this work experimentally characterizes the influence of mechanical loads and magnetic fields on the cyclic stress softening of isotropic s-MRE. The test results indicate that peak strain plays a dominant role in the occurrence of cyclic stress softening and an increased strain rate further amplifies this effect. Furthermore, the presence of a magnetic field positively influences the mechanical behaviour of isotropic s-MRE and concurrently intensifies the cyclic stress softening effect. This research enhances the understanding of the cyclic stress softening in s-MRE, thereby benefiting the long-term advancement of s-MRE-based development and design.
期刊介绍:
Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics.
The main scope is covered but not limited to the following core areas:
Polymer Materials
Nanocomposites and hybrid nanomaterials
Polymer blends, films, fibres, networks and porous materials
Physical Characterization
Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films
Polymer Engineering
Advanced multiscale processing methods
Polymer Synthesis, Modification and Self-assembly
Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization
Technological Applications
Polymers for energy generation and storage
Polymer membranes for separation technology
Polymers for opto- and microelectronics.