http://nopr.niscpr.res.in/handle/123456789/58520 2026-10-09T13:23:48Z 2026-10-09T13:23:48Z Kumar, Neeraj Kumar, Rahul Sarkar, Bikash Kumar Maity, Subhendu http://nopr.niscpr.res.in/handle/123456789/58530 2021-11-17T07:00:30Z 2021-11-01T00:00:00Z

Title: Performance Analysis of the Swashplate Axial Piston Pump with Hydraulic Fluid Temperatures Authors: Kumar, Neeraj; Kumar, Rahul; Sarkar, Bikash Kumar; Maity, Subhendu Abstract: Variable displacement axial piston pump can be used in a hydraulic system as the primary source of fluid power, which is suitable for high pressure and high efficiency. The power can be transfer in a hydraulic system with the help of the fluid medium. The oil leakage problem in various parts of the pump, especially the internal leakages in the piston-cylinder, swash plate-slipper pad and valve plate-cylinder block, seriously affect the performance of the pump. Therefore, it is important to know the properties of the fluid and its effect on the system performance. To study the performance of an axial piston pump, a non-linear mathematical model has been developed. The developed model has been validated with the existing results. The validated pump model has been used for performance analysis of the system. Moreover, the influence of hydraulic mineral oil at different temperatures on the piston chamber pressure, output power, and leakage flow in piston-cylinder has been explored. The present investigation has been performed in MATLAB Simulink 14a environment. The simulation result shows that the pump operating temperature range can be set as 30℃ to 60℃ for moderate ripple and output chamber pressure. Page(s): 943-948

2021-11-01T00:00:00Z R S, Jagadish Manisha Srinivas, Asha Baldevraj K E, Nandini Srivastava, Ashima http://nopr.niscpr.res.in/handle/123456789/58529 2021-11-17T06:55:32Z 2021-11-01T00:00:00Z

Title: Effect of Glycerol on the Functional Properties of Chitosan/PEO Films Authors: R S, Jagadish; Manisha; Srinivas, Asha; Baldevraj; K E, Nandini; Srivastava, Ashima Abstract: Polymer blending is a productive technique for granting attractive properties in polymeric materials which are advantageous for the packaging industry. In the present investigation, blended films of chitosan/poly (ethylene oxide) (PEO) were synthesized in different proportions of weight in the presence and absence of glycerol. Presence of distinctive peaks of chitosan and PEO at 1656 cm−1 and 843 cm−1 separately confirms the blending of chitosan/PEO. Simultaneously widening of peaks at 3380 cm−1 and 1656 cm−1 can be credited to the inter-molecular hydrogen bonding between chitosan/PEO films which thereby support blending. The physico-mechanical, barrier, optical, thermal, surface morphology and biodegradation properties of chitosan and PEO blended films with and without glycerol were estimated. It was seen that the tensile strength of the blended films diminished. Haze values of chitosan/PEO blended films with glycerol (20%) diminished from 17.7% for C100 to 3.7% for pure PEO bringing about an increase in transparency of the films that could be due to the plasticized effect. The outcomes indicate that in the presence of glycerol (20%), there is an increment of the elongation at break by more than 150%, inferring that these chitosan/PEO films could be suitably used in elastic and stretchable packaging. These films with high WVTR values can be utilized for fresh produce to control moisture evaporation and upgrades their shelf life. These films biodegrade or disintegrate within five weeks. Page(s): 949-955

2021-11-01T00:00:00Z Joseph, Jais Rao, A Mohan Velmurugan, S Puwar, Satbir Singh http://nopr.niscpr.res.in/handle/123456789/58528 2021-11-17T06:47:47Z 2021-11-01T00:00:00Z

Title: Analysis of Surrogate Safety Performance Parameters for an Interurban Corridor Authors: Joseph, Jais; Rao, A Mohan; Velmurugan, S; Puwar, Satbir Singh Abstract: Traditionally, road safety performance evaluation is an analysis of crash data from the past. However, methods of analysis from crash data have some well-known limitations from an analytical point of view. These limitations include small data samples causing statistical issues in analysis, under reporting of crashes and very little information about behavioral and environmental aspects at crash time. The micro simulation combined with traffic conflict technique enables the transportation engineers to investigate the safety performance of a corridor without using the crash data. Surrogate Safety Assessment Model (SSAM), utilizes simulated vehicle trajectories from the micro simulation software to investigate conflict severity and locations. In this study, safety performance evaluation is carried out of an interurban corridor of 24.3 km stretch from Gurugram to Faridabad in state of Haryana (India) using simulation software VISSIM (Verkehr In Städten – SIMulationsmodell) and SSAM. Simulated vehicular trajectories were generated and analyzed using SSAM to identify potential conflicts. The surrogate safety measures Time to Collision (TTC), Post Encroachment Time (PET) and Max ΔV are obtained by an analysis from SSAM model for all the three homogeneous sections such as midblock, curve section and intersections separately. The approach presented in the paper helps in the identification of inter-urban corridor locations prone to road crashes and hence serves as a proactive alternative as opposed to historical crashes based analyses. Page(s): 956-965

2021-11-01T00:00:00Z Kuşkapan, Emre Aydın, ÖmerLütfü Çodur, Muhammed Yasin http://nopr.niscpr.res.in/handle/123456789/58527 2021-11-17T06:37:27Z 2021-11-01T00:00:00Z

Title: A Study on the Examination of the Geologic Structure in terms of Rail Transportation Authors: Kuşkapan, Emre; Aydın, ÖmerLütfü; Çodur, Muhammed Yasin Abstract: Rail systems have an important place among the types of transportation. Although it was preferred for intercity transportation in the past, but now-a-days it is frequently preferred in urban roads. Some rail system structures move from the ground surface, while others move under the ground. Various geotechnical researches have been carried out for rail systems moving under the ground. However, for the rail vehicles moving on the ground surface are generally placed on the highway route, ground parameters are not taken into consideration. This situation can cause serious rail system accidents. This study has been conducted in Turkey's Erzurum drilling planned light rail system in terms of soil properties, it was evaluated by survey results of drilling borehole, microtremor, and multichannel analysis of surface waves (MASW). According to the results of this study, a part of the light rail system (LRS) route was found to be insufficient in terms of ground safety. For this reason, improvement in the ground or revision of the route has been suggested. Page(s): 966-970

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