3D-Printed Soft Structure of Polyurethane and Magnetorheological Fluid: A Proof-of-Concept Investigation of its Stiffness Tunability

Micromachines

Ji-Young Yoon¹  Gi-Woo Kim¹  Seong-Hwan Kim¹  Yu-Jin Park¹  Sun-Kon Lee¹  Yong-Rae Kim¹  Seong-Woo Hong¹  Seung-Bok Choi¹ 

[1] Smart Structure and Systems Laboratory, Department of Mechanical Engineering, Inha University, Incheon 22212, Korea;

关键词: three-dimensional printing;    magnetorheological fluid;    magnetic responsivity;    soft structure;    tunable elastic stiffness;   

DOI  :  10.3390/mi10100655

来源: DOAJ

【 摘 要 】

In this study, a soft structure with its stiffness tunable by an external field is proposed. The proposed soft beam structure consists of a skin structure with channels filled with a magnetorheological fluid (MRF). Two specimens of the soft structure are fabricated by three-dimensional printing and fused deposition modeling. In the fabrication, a nozzle is used to obtain channels in the skin of the thermoplastic polyurethane, while another nozzle is used to fill MRF in the channels. The specimens are tested by using a universal tensile machine to evaluate the relationships between the load and deflection under two different conditions, without and with permanent magnets. It is empirically shown that the stiffness of the proposed soft structure can be altered by activating the magnetic field.

【 授权许可】

Unknown