Testing device and experimental investigation to influencing factors of Magnetorheological fluid

2013 ◽  
Vol 43 (3) ◽  
pp. 283-292 ◽  
Author(s):  
Tiger Sun ◽  
Xianghe Peng ◽  
Jingzhi Li ◽  
Chao Feng
Keyword(s):  
Experimental Investigation ◽  
Influencing Factors ◽  
Magnetorheological Fluid ◽  
Testing Device

Experimental Investigation on the Embracing Force of Medical Ni-Ti Memory Alloy Arm-Embracing Fixator

2009 ◽  
Vol 79-82 ◽  
pp. 55-58
Author(s):  
Guo Ping Chen ◽  
Jun Lin Tao ◽  
Dai Quan Zhang ◽  
Lang Tang
Keyword(s):  
Experimental Investigation ◽  
Shape Memory Alloy ◽  
Memory Function ◽  
Clinical Treatment ◽  
Internal Fixator ◽  
Ti Alloy ◽  
Testing Device ◽  
Designed Experiment ◽  
Repeated Experiment ◽  
Equal Temperature

The unique memory function of Ni-Ti alloy makes it unique durative self-press function as the orthopaedics internal fixator devices, the durative embracing force provides a good mechanical condition for the bone healing in clinical orthopaedics. Through the special embracing force testing device and using self-designed experiment device which arms at this kind of arm-embracing Internal fixator experiment to observe the effect of the extended distance of arms on the embracing force when Ni-Ti shape memory alloy arm-embracing fixes fractures. It is researched that the state affected embracing force under the resistance effect, and fully realizes the law of embracing force’s variety. The investigation has been done to the clutching internal fixator which frequently used in clinical treatment of orthopedic and find that the embracing force increases with time and stabilizes finally, when the open end of arm-embracing internal fixator is in the equal temperature and opening under the resistive effect; it observes the character of embracing force which increasing along with the opening degree of the arms when the open end is at the same temperature and different opening degree; it also researches that the embracing force has the rule of change that it will reduce in repeated experiment at the same temperature, at the same place of the memory alloy arm-embracing clip. The research provides the instructions and references based on mechanics for clinical treatment.

Experimental investigation on the influencing factors of preparing porous fly ash-based geopolymer for insulation material

2018 ◽  
Vol 168 ◽  
pp. 9-18 ◽  
Author(s):  
Yajun Huang ◽  
Lunlun Gong ◽  
Long Shi ◽  
Wei Cao ◽  
Yuelei Pan ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Fly Ash ◽  
Influencing Factors ◽  
Insulation Material

scholarly journals Experimental Investigation on the Imbibition Capacity and Its Influencing Factors in Hydrate Sediments

ACS Omega ◽  
2020 ◽  
Vol 5 (24) ◽  
pp. 14564-14574 ◽  
Author(s):  
Liu Yang ◽  
Chuanqing Zhang ◽  
Hongfeng Lu ◽  
Yuanhan Zheng ◽  
Yifan Liu
Keyword(s):  
Experimental Investigation ◽  
Influencing Factors

scholarly journals Numerical Simulation and Experimental Analysis of Microstructure of Magnetorheological Fluid

2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Dongsheng Ji ◽  
Yiping Luo ◽  
Hongjuan Ren ◽  
Dan Wei ◽  
Jun Shao
Keyword(s):  
Numerical Simulation ◽  
Influencing Factors ◽  
Shear Force ◽  
Magnetic Particles ◽  
Deep Understanding ◽  
Magnetorheological Fluid ◽  
Point Of View ◽  
Macroscopic Properties ◽  
New Type ◽  
Numerical Calculation Method

Magnetorheological fluid is a new type of smart material that is sensitive to magnetic fields and has controllable performance. It is widely regarded for its unique magnetorheological effect and good rheological properties. For materials, the microstructure determines its macroscopic properties. In order to better study its macroscopic properties, it is necessary to have a more comprehensive understanding and deep understanding of its microstructure. In this paper, the magnetization process of magnetorheological fluid is analyzed from a microscopic point of view. Based on Newton’s second law, the dynamic model of particle motion is established. The magnetic force, repulsive force, and viscous resistance of magnetic particles are analyzed. The finite difference numerical calculation method is used. The velocity-Verlet algorithm simulates the static microstructure chaining process of the magnetorheological fluid and the dynamic chaining process under shear force under different influencing factors. At the same time, a static observation device and a shear observation device were developed to observe the microstructure chaining morphology of magnetorheological fluid under different influencing factors, and to study the dynamic chaining law of magnetorheological fluid under the action of a shear force. Therefore, a reasonable contrast index is established, and the numerical simulation results are compared with the experimental observation results.

Preparation, Characterization of Low Infrared Emissivity Stealth Coating

2013 ◽  
Vol 634-638 ◽  
pp. 2502-2505 ◽  
Author(s):  
Xiao Meng Lv ◽  
Xiao Li Gou ◽  
Huan Chun Wang ◽  
Xiang Xuan Liu
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Temperature ◽  
Influencing Factors ◽  
Testing Device ◽  
Infrared Emissivity ◽  
Coating Surface ◽  
Infrared Spectrometer ◽  
Scanning Electron

Ni-P modified hollow cenosphere was used to prepare infrared stealth coating. Infrared Spectrometer, Scanning Electron Microscope, Infrared Emissivity Testing Device are used to study the performance of the infrared stealth coating. Influencing factors of infrared emissivity of coating are analyzed comprehensively. The lowest emissivity of infrared stealth coating in 8-14um wavebands is 0.63 and the ability of controlling the coating surface temperature is raised.

scholarly journals Analysis and evaluation of temperature field and experiment for magnetorheological fluid testing devices

2021 ◽  
Vol 13 (4) ◽  
pp. 168781402110125
Author(s):  
Hao Xiong ◽  
Yiping Luo ◽  
Dongsheng Ji ◽  
Hongjuan Ren ◽  
Dan Wei ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Temperature Field ◽  
Yield Stress ◽  
Stress Testing ◽  
Magnetorheological Fluid ◽  
Simulation Software ◽  
Testing Device ◽  
Two Factors ◽  
Temperature Field Model ◽  
Coil Winding

When a large amount of heat is produced during the operation of a MRF (magnetorheological fluid) testing device, the temperature of the device will increase, which will in turn affect the characteristics of the MRF. Exploring the temperature field characteristics of the MRF yield stress testing device is necessary to improve the accuracy of the device. In this study, first, the yield stress testing device is designed, and then its temperature field model, including enameled wire and assembly gap, is established. Second, simulation software is used to simulate the temperature field change. Finally, a test platform is developed to test the simulation results, especially for two factors, namely, thermal conductivity of the coil winding and assembly gap, which demonstrate considerable influence. Comprehensive thermal conductivity and assembly clearance are determined, and the optimum temperature field of the device for measuring yield stress is resulted.

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