TY - JOUR A1 - Chavez Vega, Jhohan Harvey A1 - Ziolkowski, Marek A1 - Schorr, Philipp A1 - Spiess, Lothar A1 - Böhm, Valter A1 - Zimmermann, Klaus T1 - A method to approach constant isotropic permeabilities and demagnetization factors of magneto-rheological elastomers JF - Journal of Magnetism and Magnetic Materials N2 - The use of non-conventional materials is nowadays of much interest in scientific community. Magneto-rheological elastomers are hybrid materials, which in presence of magnetic fields state a change in their mechanical properties. They are composed by an elastomeric matrix with embedded magnetic particles. One of the most attractive features of these materials is that as soon as the magnetic field is removed from the material, the original mechanical properties are completely recovered, with negligible differences in comparison to the original state. This paper focuses on the study of magnetic characteristics of these smart materials, such as relative permeability and demagnetizing factors, for samples with different volume concentration of ferromagnetic particles. KW - Demagnetization factor KW - Finite element simulations KW - Magneto-rheological elastomer KW - Relative permeability KW - Static magnetic field Y1 - 2021 U6 - https://doi.org/10.1016/j.jmmm.2021.167742 VL - 527 PB - Elsevier ER - TY - CHAP A1 - Chavez Vega, Jhohan Harvey A1 - Schorr, Philipp A1 - Scharff, Moritz A1 - Schale, Florian A1 - Böhm, Valter A1 - Zimmermann, Klaus T1 - Towards Magneto-Sensitive Elastomers Based End-Effectors for Gripping Application Technologies T2 - 2019 IEEE International Conference on Mechatronics (ICM), 18-20 March 2019, Ilmenau, Germany N2 - Nowadays, the demands in engineering systems become more challenging and the use of conventional materials for certain applications is not suitable. This issue encourages the investigation of novel and innovative materials in soft robotics field. A promising approach is the consideration of magneto-sensitive elastomers (MSE). These materials enable a useful adaptability responding to their mechanical properties. By applying a static magnetic field, the static and dynamic characteristics can be tuned. However, currently the knowledge about the correlations are not satisfying and the resulting material properties can only be predicted approximately with the use of time-expensive simulations regarding to the nano scale. Therefore, feasible material simulations of the description of the mechanical behavior are necessary. In this paper experimental studies of the influence of a static magnetic field on the mechanical properties and shape adaptability of MSE are presented. Furthermore, based on these results a simulation for the material behavior is executed. These results can be implemented into further simulations for various MSE exemplars. KW - End effectors KW - field-induced plasticity KW - finite-element simulation KW - Iron KW - Magnetomechanical effects KW - magneto-sensitive elastomer KW - Oils KW - SHAPE KW - Soft magnetic materials KW - soft robotics KW - Static magnetic field Y1 - 2019 U6 - https://doi.org/10.1109/ICMECH.2019.8722922 VL - 1 SP - 217 EP - 222 PB - IEEE ER -