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SAE International Journal of Commercial Vehicles
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An Investigation of a Locomotive Structural Crashworthiness Using Finite Element Simulation

SAE International Journal of Commercial Vehicles

Amity School of Engineering and Technology, Amity University Uttar Pradesh, Noida, India-Sunil Kumar Sharma
Maharishi Markandeshwar (Deemed to be University) Mullana, India-Rakesh Chandmal Sharma
  • Journal Article
  • 02-11-04-0019
Published 2018-11-02 by SAE International in United States
In this article, the crashworthiness of a locomotive is assessed through finite element analysis (FEA). The present investigation is focused on the analysis of a locomotive with driving cab to improve the modeling approach and exploring the intrinsic structural weaknesses to improve its crashworthiness. The analyses are conducted according to the EN 15227 standard, which provide crashworthiness requirements for locomotive structure. The finite element model is validated in terms of acceleration and energy balance by the experimental results. The validated model is further used to assess the crashworthiness behavior at a higher impact speed, that is, 100, 160, and 225 km/hr. It has been noticed that local buckling occurs at different points, which reduces the desired progressive damage behavior in the locomotive. The results indicate that at higher speed, large plastic deformation occurs in the frontal part of the locomotive. The maximum deformation is 8.22 m which occurs at the speed of 225 km/hr.
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Computational Fluid Dynamic Simulation of In-Cylinder Pressures to Validate High-Range VCR

SAE International Journal of Commercial Vehicles

Kettering University, USA-William Edwards
Saint Martin’s University, USA-Shelbie L. Davis, Frank Washko
  • Journal Article
  • 02-11-04-0020
Published 2018-10-22 by SAE International in United States
This article serves as a proof-of-concept and feasibility analysis regarding a variable compression ratio (VCR) engine design utilizing an exhaust valve opening during the compression stroke to vary the compression ratio instead of the traditional method of changing the cylinder or piston geometry patented by Ford, Mercedes-Benz, Nissan, Peugeot, Gomecsys, et al. [1]. In this concept, an additional exhaust valve opening was used to reduce the virtual compression ratio of the engine, without geometric changes. A computational fluid dynamics model in ANSYS Forte was used to simulate a single-cylinder, cold flow, four-stroke, direct injection engine cycle. In this model, the engine was simulated at a compression ratio of 10:1. Then, the model was modified to a compression ratio of 17:1. Then, an additional valve opening at the end of the compression stroke was added to the 17:1 high compression model. The valve opening at the end of the compression stroke was used to bleed off a small amount of pressure. This allows an engine to be built for a geometric 17:1 compression ratio (longer cylinder)…
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Investigation of Fatigue Life of Wheels in Commercial Vehicles

SAE International Journal of Commercial Vehicles

Pimpri Chinchwad College of Engineering-Umesh Sadashiv Bawaskar, P. Awasare
  • Journal Article
  • 02-11-04-0017
Published 2018-08-21 by SAE International in United States
In India, vehicle population increases every day along with road accidents by 2.5% every year. About 7.7% of accidents are caused by wheel separation, 60% of which are due to nut-related problems. Wheel separations in vehicles occur due to fastener issues and fatigue failures in bolts. A study of the reasons for and mechanisms of nut loosening showed that left-hand side wheels detached and fracture failure occurred in right-hand side studs. Fatigue life of wheels with Nord-Lock washer and without washer is determined by using numerical analysis as per the IS 9438 cornering fatigue test. These numerical results are compared with experimental results.
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Hydro-Pneumatic Energy Harvesting Suspension System Using a PSO Based PID Controller

SAE International Journal of Commercial Vehicles

Benha University-Mohamed Ibrahim Sokar, Saber M. Abdrabbo
Cairo University-Magdy Naeem Awad, Mohamed El-sayed El-Arabi
  • Journal Article
  • 02-11-04-0018
Published 2018-08-01 by SAE International in United States
In this article, a unique design for Hydro-Pneumatic Energy Harvesting Suspension HPEHS system is introduced. The design includes a hydraulic rectifier to maintain one-way flow direction in order to obtain maximum power generation from the vertical oscillation of the suspension system and achieve handling and comfort car drive. A mathematical model is presented to study the system dynamics and non-linear effects for HPEHS system. A simulation model is created by using Advanced Modeling Environment Simulations software (AMESim) to analyze system performance. Furthermore, a co-simulation platform model is developed using Matlab-Simulink and AMESim to optimize the PID controller parameters of the external variable load resistor applied on the generator by using Particle Swarm Optimization (PSO). The results showed that the proposed design and PID-PSO controller was effective and practical for the regenerative suspension system since the maximum amplitude of vibration and settling time of the system is decreased compared to the uncontrolled system. The PID-PSO controller achieve the maximum riding comfort as the peak values of the acceleration and displacement is reduced by 14.5%, and 11.6%…
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