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RISS 인기검색어
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- 저자 : Chiranjit Sarkar (검색결과 2 건)
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In-situ braking torque and temperature analysis of two-wheeler drum brake in friction braking
Rakesh Kumar Singh,Chiranjit Sarkar 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.4
Generally, two-wheelers consist of a drum brake on the rear wheel. The performance of the brake deteriorates drastically due to the continuous use of brakes during driving. Thus, studying brake performance in the worst conditions, where brakes are applied back to back after a fixed time interval, becomes essential. To fulfill this, the in-situ braking torque behavior of the two-wheeler drum brake is studied experimentally, and the in-situ thermal behavior is studied experimentally and numerically in the present paper. A new test rig is designed using a motor, torque sensor, data acquisition system, and drum brake of the twowheeler. The effect of speed and braking cycles on the torque and thermal behavior of drum brake is studied. The torque required for approximately the same deceleration is dependent on the speed of drum and brake cycles. Similarly, results are found for thermal analysis, and drum surface temperature depends on the speed of the drum. Moreover, the drum surface temperature increases steadily with the increase of brake cycles.
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Chandra Shekhar Maurya,Chiranjit Sarkar 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.110 No.-
In this work novel kinds of highly stable MR gels were prepared by suspending flake-shaped micron-sizedcarbonyl iron (CI) particles into water/OPTIGEL-WX suspension, OPTIGEL-WX is a promising additive thatforms a gel-like structure with water. We found that surface tension decreases when the concentration ofOPTIGEL-WX was raised, and the contact angle increased due to a stronger adhesive force at the liquid–air interface between the host liquid molecules and the CI particles. We examined magneto-induced rheologicaland viscoelastic properties using Anton-Paar (MCR-102) rheometer. The theoretical Binghammodel was used to fit the experimental shear stress versus shear rate curves and observed static anddynamic yield stress values were substantially identical. Amplitude sweep showed that the linear viscoelasticregion (LVE) was obtained approximately at 0.1% of shear strain. A crossover point, modulusG0& G} , and yield stress were enhanced as the magnetic field was increased. Frequency sweepshowed that the storage modulus shows an increasing trend with the increase of frequency at first, whileat higher frequency range storage modulus shows a steady plateau area. Time-dependent shear flow andamplitude sweep tests revealed complete reversibility of rheological and viscoelastic properties of theMR gel with time after destroying the microstructures.
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