Experimental and modeling investigations on the quasi-static compression properties of isotropic silicone rubber-based magnetorheological elastomers under the magnetic fields ranging from zero to saturation field

Qiao, Yanliang; Zhang, Jiangtao; Zhang, Mei; Zhai, Pengcheng; Guo, Xiang

doi:10.1088/1361-665x/ac3c06

Cited by 5 publications

(5 citation statements)

References 49 publications

(82 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results suggest that the load-bearing capacity, stiffness and damping of the MREs are improved by increasing the magnetic flux density, which reaches saturation in excess of 750 mT. The field-dependent properties of MREs, commonly known as the MR effect, are generally explained as that when an external magnetic field is imposed on the MRE material, three-dimensional chain-like particle network structures can be formed in the MRE material resulting from the interparticle dipolar interactions [11,34,39,40]. Thus the MRE material can be regarded as two interpenetrating networks, which consist of the polymer network and the inter-particle magnetic force network [39].…”

Section: Effect Of Cip Contentmentioning

confidence: 99%

See 1 more Smart Citation

Magnetorheological behavior of isotropic silicone rubber-based magnetorheological elastomers under coupled static–dynamic compressive loads

Zhang¹,

Qiao²,

Zhang³

et al. 2022

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

The primary goal of this work is to test and model the magnetorheological (MR) properties of the isotropic magnetorheological elastomers (MREs) under the coupled static–dynamic compressive loads. Isotropic MREs with different contents of magnetic particles were fabricated based on the silicone elastomer. In order to apply the controllable magnetic field to the MREs and directly measure the viscoelastic force of the deformed MREs during the dynamic tests, an electromagnet with a magnetic flux density of up to 0.9 T was developed and integrated into an electric dynamic test system. The stress–strain hysteresis loops of the produced MREs were experimentally characterized under the dynamic compressive loads coupled with different static pre-strains. Effects of particle content, strain amplitude, static pre-strain and load frequency on the MR properties of the MREs were examined in terms of the characteristics of the hysteresis loops, as well as the MR effects in the storage modulus, loss modulus and pre-stress. The results revealed that irrespective of the applied magnetic field, the deformation behavior of the produced MREs was in an approximate linear viscoelastic state when the strain amplitude was less than 7.5%. Both the absolute and relative MR effects increase with the increasing particle content, and decrease with the increasing strain amplitude. Only the absolute MR effect increases with the increasing pre-strain. While varying the load frequency has almost no effect on the MR effect of the MREs. Furthermore, two empirical models were proposed respectively for predicting the storage modulus and loss modulus of the MREs as functions of the magnetic flux density, particle content, strain amplitude, pre-strain and load frequency. The graphical comparison and quantitative evaluation show that the proposed models can give effective predictions of the storage and loss moduli of the produced MREs under the applied load conditions in this work.

show abstract

Section: Effect Of Cip Contentmentioning

confidence: 99%

“…The real-time control of magnetic field strength is another problem in practical applications. For applying controllable and higher magnetic field strength, electromagnets have been employed in the compressive property tests of MREs in many recent works [16,18,25,26,[30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Magnetorheological behavior of isotropic silicone rubber-based magnetorheological elastomers under coupled static–dynamic compressive loads

Zhang¹,

Qiao²,

Zhang³

et al. 2022

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore, the coil is expected to be used in the biomedical microrobotics field in the future. Although the material used in this study was a composite of zinc oxide powder in a silicone matrix, various functionalities, such as the electrical conductivity and magnetic field response, are expected when other powder materials are used. , …”

Section: Discussionmentioning

confidence: 99%

“…32,33 ■ ASSOCIATED CONTENT * sı Supporting InformationThe Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsomega.2c00475.Experimental apparatus; optical images of coils with various string diameters; relationship between the curvature of silicone strings and the duration of UV− ozone treatment; optical images of coils prepared using transparent silicone; optical image of a polyurethane coil; schematic of the measurement method for spring constants; and optical images of coils before and after immersion in aqueous solutions (PDF) Faculty of Textile Science and Technology, Shinshu University, Ueda, Nagano 386-8567, Japan; orcid.org/0000-0001-5995-8019; Email: mwatana@shinshu-u.ac.jp…”

mentioning

confidence: 99%

Coil Formation of a Silicone String Using UV–Ozone Treatment

et al. 2022

View full text Add to dashboard Cite

Microcoils are used in various mechanical devices. However, existing methods for producing microcoils from polymers often require expensive equipment. In this study, microcoils were prepared using a cost-effective and simple method. The material used was silicone, which is a biocompatible polymeric material. Silicone was solidified inside glass capillaries to form thin, straight strings with a diameter of 140 μm. The string was then transformed to a coil shape by oxidation using UV–ozone treatment while it was prestretched and pretwisted. The resilience force from the prestretching and pretwisting forces caused the string to bend and twist, respectively. As a result of the combination of these deformation modes, a coil was formed. As an application of the coils, an actuator was prepared, which repeatedly transforms between straight and coiled shapes. The actuation was caused by the swelling/deswelling of silicone with hexane. A large strain of 54% was obtained.

show abstract

“…The energy methods have been shown to be valid for 1D laminated structures through integration with traditional beam theory [24] and for 2D structures by coupling classical plate theory with Poisson's effect [27]. A magneto-induced actuation model was also established for an isotropic MAE by taking account of hyperelastic properties, and the results revealed the magneto-induced actuation stress and shear modulus increased with the content of magnetic particles (e.g., CIPs) [28]. A segment-wise modeling approach makes it easier to account for local anisotropy in material properties or non-uniformness of geometry.…”

Section: Introductionmentioning

confidence: 99%

Analytical modeling of a magnetoactive elastomer unimorph

Pan

Leng

Uitz

et al. 2023

Smart Mater. Struct.

View full text Add to dashboard Cite

Magnetoactive elastomers (MAE) are capable of large deformation, shape programming, and moderately large actuation forces when driven by an external magnetic field. These capabilities enable applications such as soft grippers, biomedical devices, and actuators. To facilitate complex shape deformation and enhanced range of motion, a unimorph can be designed with varying geometries, behave spatially varying multi-material properties, and be actuated with a non-uniform external magnetic field. To predict actuation performance under these complex conditions, an analytical model of a segmented MAE unimorph is developed based on beam theory with large deformation. The effect of the spatially-varying magnetic field is approximated using a segment-wise effective torque. The model accommodates spatially varying concentrations of magnetic particles and differentiates between the actuation mechanisms of hard and soft magnetic particles by accommodating different assumptions concerning the magnitude and direction of induced magnetization under a magnetic field. To validate the accuracy of the model predictions, four case studies are considered with various magnetic particles and matrix materials. Actuation performance is measured experimentally to validate the model for the case studies. The results show good agreement between experimental measurements and model predictions. A further parametric study is conducted to investigate the effects of the magnetic properties of particles and external magnetic fields on the free deflection. In addition, complex shape programming of the unimorph actuator is demonstrated by locally altering the geometric and material properties.

show abstract

Experimental and modeling investigations on the quasi-static compression properties of isotropic silicone rubber-based magnetorheological elastomers under the magnetic fields ranging from zero to saturation field

Cited by 5 publications

References 49 publications

Magnetorheological behavior of isotropic silicone rubber-based magnetorheological elastomers under coupled static–dynamic compressive loads

Magnetorheological behavior of isotropic silicone rubber-based magnetorheological elastomers under coupled static–dynamic compressive loads

Coil Formation of a Silicone String Using UV–Ozone Treatment

Analytical modeling of a magnetoactive elastomer unimorph

Contact Info

Product

Resources

About