**2. MR fluid**

Magnetorheological fluid also called as MR fluid consist of magnetic material and a carrier oil influence effective under the applied magnetic field. The applied magnetic field have influence over most important rheological properties like as yield stress and apparent viscosity as shown in **Figure 1**. Their increased contribution in space technology, through domestic products is noteworthy. Particularly their applications in dampers, power steering pumps, brakes and control valves are significant. In automobile application, micron size particles are acceptable of the frequent vibrations but on move to seismic factor, since the vibrations are not regularly taken place, sedimentation cause major problems. Therefore, many researchers notably civil engineers are currently focusing on fluid behavior in dampers for structures. In the present work, MR fluid was prepared with the help of Nano Fe3O4 particle and silicone oil by 60% weight, additionally their efficiency towards MR damper is investigated.

## **2.1 X-ray diffraction studies**

The synthesized nano Fe3O4 was well characterized by X-ray crystallographic technique and are depicted in **Figure 2** using the Model (Schimadzu, LAB X,

**9**

Fe3O4.

**Figure 3.**

**Figure 2.**

*XRD pattern of Fe3O4 iron particles.*

particle size is 12 nm.

*SEM image of Fe3O4 iron particles.*

**2.2 Surface morphology studies**

*Effects of Creep on RC Frame Subjected to Cyclic Load with Magnetorheological Damper*

XRD-600) using CuKα radiation. The prominent XRD peaks observed were indexed and analyzed using ICDD database. The JCPDS file no. 79-0417 represents a magnetite structure in it. The average particle size of the material was examined using the most intense plane (311) with the help of Scherrer equation. The average

The surface morphology of the synthesized Fe3O4 was obtained using Scanning Electron Microscopy (SEM, JEOL 6390). **Figure 3** depicts the SEM image of the synthesized compound reveals the uneven spherical like structure for the Nano

*DOI: http://dx.doi.org/10.5772/intechopen.81971*

**Figure 1.** *MR damper with and without magnetic field.*

*Effects of Creep on RC Frame Subjected to Cyclic Load with Magnetorheological Damper DOI: http://dx.doi.org/10.5772/intechopen.81971*

**Figure 2.** *XRD pattern of Fe3O4 iron particles.*

*Creep Characteristics of Engineering Materials*

wide range.

**2. MR fluid**

damper is investigated.

**2.1 X-ray diffraction studies**

The focus of this paper is to experimentally demonstrate the ability of the MR

Magnetorheological fluid also called as MR fluid consist of magnetic material and a carrier oil influence effective under the applied magnetic field. The applied magnetic field have influence over most important rheological properties like as yield stress and apparent viscosity as shown in **Figure 1**. Their increased contribution in space technology, through domestic products is noteworthy. Particularly their applications in dampers, power steering pumps, brakes and control valves are significant. In automobile application, micron size particles are acceptable of the frequent vibrations but on move to seismic factor, since the vibrations are not regularly taken place, sedimentation cause major problems. Therefore, many researchers notably civil engineers are currently focusing on fluid behavior in dampers for structures. In the present work, MR fluid was prepared with the help of Nano Fe3O4 particle and silicone oil by 60% weight, additionally their efficiency towards MR

The synthesized nano Fe3O4 was well characterized by X-ray crystallographic technique and are depicted in **Figure 2** using the Model (Schimadzu, LAB X,

damper to reduce structural responses. Following a description of the experimental setup, cyclic load test is carried out in the RC frame with and without damper. The effects of stress, strain, displacement and load behavior for RC element with various time interval is studied with and without MR damper. The results indicate for seismic response reduction, MR damper is quite effective for

**8**

**Figure 1.**

*MR damper with and without magnetic field.*

**Figure 3.** *SEM image of Fe3O4 iron particles.*

XRD-600) using CuKα radiation. The prominent XRD peaks observed were indexed and analyzed using ICDD database. The JCPDS file no. 79-0417 represents a magnetite structure in it. The average particle size of the material was examined using the most intense plane (311) with the help of Scherrer equation. The average particle size is 12 nm.
