Thông tin chung
  English
  Đề tài NC khoa học
  Bài báo, báo cáo khoa học
  Hướng dẫn Sau đại học
  Sách và giáo trình
  Các học phần và môn giảng dạy
  Giải thưởng khoa học, Phát minh, sáng chế
  Khen thưởng
  Thông tin khác
  Tài liệu tham khảo
  Hiệu chỉnh
 
Số người truy cập: 109,410,998

 An improved model of magnetorheological elastomer of frequency, magnetic field, and amplitude responses
Tác giả hoặc Nhóm tác giả: Quang Du Nguyen, Xuan Bao Nguyen, Cung Le, Hoa Thi Truong, Minh Tien Nguyen
Nơi đăng: Journal of Mechanical Science and Technology; Số: 38 (2);Từ->đến trang: 623-637;Năm: 2024
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
Magnetorheological elastomers (MRE) are smart materials that have recently attracted considerable interest. The mechanical properties of MREs change significantly in the presence of a magnetic field. This study investigates the MRE properties and proposes a new model for designing systems using MRE. First, an MRE material fabrication process is introduced, and the dynamic properties of the MRE are investigated under different magnetic field strengths, frequencies, and amplitudes. The smooth Coulomb friction model is well known, representing the amplitude-dependent mechanical properties well. However, the model was inefficient when describing materials' properties at the low strain frequency (< 2 Hz). In this study, an improved Coulomb friction model has been developed to improve this problem by adding the strain velocity influence factor. Furthermore, the fractional viscous and variable stiffness models represent the material properties dependent on the frequency and magnetic field. Finally, a simple procedure, with easy computation, is proposed for determining the model parameters. The model results are compared with two classical models, the Coulomb model and the Bouc-Wen model. The developed model overcomes the disadvantages of the smooth Coulomb friction model when applied at low frequencies. Simulation and experimental results show that the proposed model achieves a deviation of just under 6 % in most cases, lower than when implementing the classical Coulomb friction (8 %) and hysteresis Bouc-wen models (7 %). The model also achieved similar accuracy when used for laminated MRE.
ABSTRACT
Magnetorheological elastomers (MRE) are smart materials that have recently attracted considerable interest. The mechanical properties of MREs change significantly in the presence of a magnetic field. This study investigates the MRE properties and proposes a new model for designing systems using MRE. First, an MRE material fabrication process is introduced, and the dynamic properties of the MRE are investigated under different magnetic field strengths, frequencies, and amplitudes. The smooth Coulomb friction model is well known, representing the amplitude-dependent mechanical properties well. However, the model was inefficient when describing materials' properties at the low strain frequency (< 2 Hz). In this study, an improved Coulomb friction model has been developed to improve this problem by adding the strain velocity influence factor. Furthermore, the fractional viscous and variable stiffness models represent the material properties dependent on the frequency and magnetic field. Finally, a simple procedure, with easy computation, is proposed for determining the model parameters. The model results are compared with two classical models, the Coulomb model and the Bouc-Wen model. The developed model overcomes the disadvantages of the smooth Coulomb friction model when applied at low frequencies. Simulation and experimental results show that the proposed model achieves a deviation of just under 6 % in most cases, lower than when implementing the classical Coulomb friction (8 %) and hysteresis Bouc-wen models (7 %). The model also achieved similar accuracy when used for laminated MRE.
© Đại học Đà Nẵng
 
 
Địa chỉ: 41 Lê Duẩn Thành phố Đà Nẵng
Điện thoại: (84) 0236 3822 041 ; Email: dhdn@ac.udn.vn