Effect of magnetic field on damping ability of magnetorheological damper during hard turning

Paul, P. Sam; Varadarajan, A.; Vasanth, X. Ajay; Lawrance, G.

doi:10.1016/j.acme.2013.11.001

Cited by 37 publications

(5 citation statements)

References 13 publications

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“…AISI4340 steel was selected as a work material which is widely used in die making, automobile and allied industries. 22 Its other applications include aircraft engine mounts, propeller shafts, connecting rods, gear shafts, crane shafts and heavy forgings such as rotor shafts, discs and welded tubing applications. It is a through hardenable medium alloy steel that can be hardened to 46HRc and is known for its toughness, tensile strength and fatigue strength and is less costly compared to high alloy steels.…”

Section: Selection Of Tool and Work Materialsmentioning

confidence: 99%

Effectiveness of particle and mass impact damping on tool vibration during hard turning process

Paul

Raja

Aruldhas

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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In the machine tools, tool vibration is an undesirable phenomenon which affects tool life, quality of machined surface and produces irritating noise. This tool vibration is due to the interaction between metal cutting process and forces acting on the machine tool. In this investigation, an attempt was made to reduce tool vibration during turning of hardened steel using particle and mass impact dampers. A mass impact damper used in this investigation consists of a concentrated mass made of copper mounted on the bottom of the tool holder and particle damper consists of copper particles of 3.5 mm diameter positioned along the axis of the tool holder. Particle size and its location were designed using computational analysis and impact hammer-based modal testing was performed for both dampers. When these dampers were mounted on the tool holder, particles will collide with each other and subdue the vibration produced in the tool holder. Cutting experiments were conducted to study the influence of mass and particle damping on tool vibration and cutting performance during turning of hardened AISI4340 steel using hard metal insert with sculptured rake face. From the results, it was observed that the use of mass impact and particle dampers enhances the rigidity of the tool holder which, in turn, reduces tool vibration and improves the cutting performance. Among the two dampers, it was found that the presence of mass impact damping provides superior cutting performance when compared to particle damping.

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Section: Selection Of Tool and Work Materialsmentioning

confidence: 99%

Effectiveness of particle and mass impact damping on tool vibration during hard turning process

Paul

Raja

Aruldhas

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part B:

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show abstract

“…The yield stress generated at this time is proportional to the strength of the applied magnetic field intensity [2]. MR shock absorber is a representative application that utilizes the characteristics of MR fluid and has been studied in various fields such as transportation [3][4][5], home appliances [6], and industrial machinery [7,8]. Carlson et al [9] firstly added a magnetic core to an existing monotube shock absorber in which MR fluid is filled instead of the hydraulic oil.…”

Section: Introductionmentioning

confidence: 99%

A new magnetic core model for magnetorheological fluid-based applications considering fringing effect of gap and magnetic nonlinearity of fluids

Yoon¹,

Kang²,

Choi³

2021

Smart Mater. Struct.

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This research aims to introduce a new magnetic core model for magnetorheological (MR) applications requiring high and wide controllable force. In general, the existing models linearize the magnetic behavior of magnetic cores for computational convenience. However, when MR applications such as MR damper require both high actuating force and relatively wide controllable force range, the nonlinearity of the magnetic properties becomes significant, which makes a big difference between the model and actual result. For this reason, the finite element method (FEM) is frequently adopted for modeling the magnetic cores, but it requires a lot of cost and time. To compensate for these disadvantages, a new nonlinear magnetic core model considering both the nonlinearity of the B–H curve of MR fluid and the fringing effect of the gap is proposed in this work. The approach is an extension of Kirchhoff’s law, which performs conformal mapping and backward calculation techniques. After formulating the analytical model, a magnetic core with specific parameters is designed as an illustrative example to validate the proposed model. It is shown through comparative investigations on the proposed model, linearization model, and FEM model that the proposed model is very effective to predict the high controllable force of MR applications.

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“…For the past 20 years, the significant advantages of MR fluids, such as their fast reactivity and easy controllability in terms of high yield stress, have been utilized in various devices including dampers [3], valves [4], brakes [5], clutches [6], mounts [7][8][9], and even medical devices [10]. In particular, it has been reported that MR dampers are applicable to many different industries in terms of a reduction of unwanted vibrations and impact, including in vehicle suspensions (for passenger [11][12][13], military [14], and railway [15] vehicles), landing gear systems [16], seat dampers [17,18], washing machines [19,20], industrial machines [21,22], seismic response reduction structures [23,24], bridge vibration control [25], impact absorbers for gun recoil systems [26], vehicle crash energy absorbers [27,28], pedestrian protection systems in vehicles [29], and shock profile systems [30].…”

Section: Introductionmentioning

confidence: 99%

Design and damping force characterization of a new magnetorheological damper activated by permanent magnet flux dispersion

Lee

Han

Choi

2017

Smart Mater. Struct.

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This work proposes a novel type of tunable magnetorheological (MR) damper operated based solely on the location of a permanent magnet incorporated into the piston. To create a larger damping force variation in comparison with the previous model, a different design configuration of the permanent-magnet-based MR (PMMR) damper is introduced to provide magnetic flux dispersion in two magnetic circuits by utilizing two materials with different magnetic reluctance. After discussing the design configuration and some advantages of the newly designed mechanism, the magnetic dispersion principle is analyzed through both the formulated analytical model of the magnetic circuit and the computer simulation based on the magnetic finite element method. Sequentially, the principal design parameters of the damper are determined and fabricated. Then, experiments are conducted to evaluate the variation in damping force depending on the location of the magnet. It is demonstrated that the new design and magnetic dispersion concept are valid showing higher damping force than the previous model. In addition, a curved structure of the two materials is further fabricated and tested to realize the linearity of the damping force variation.

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Effect of magnetic field on damping ability of magnetorheological damper during hard turning

Cited by 37 publications

References 13 publications

Effectiveness of particle and mass impact damping on tool vibration during hard turning process

Effectiveness of particle and mass impact damping on tool vibration during hard turning process

A new magnetic core model for magnetorheological fluid-based applications considering fringing effect of gap and magnetic nonlinearity of fluids

Design and damping force characterization of a new magnetorheological damper activated by permanent magnet flux dispersion

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