Failure Assessment of Load-Stabilizing Rod in Heavy-Duty Truck Through CAE and Testing in Rough Road Conditions
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TECHNICAL ARTICLE—PEER-REVIEWED
Failure Assessment of Load-Stabilizing Rod in Heavy-Duty Truck Through CAE and Testing in Rough Road Conditions P. Thangapazham . L. A. Kumaraswamidhas . D. Muruganandam
Submitted: 7 January 2019 / in revised form: 13 August 2019 Ó ASM International 2019
Abstract The load-stabilizing (LS) rod is a part of heavyduty mining vehicle front axle suspension system. The application of LS rod is essential in mining vehicle used predominantly for transportation of iron ore, coal, etc. from stockpile to storage yard. In this vehicle, two front axles are used for higher load capacity and better maneuverability. The load-stabilizing rod is one of the most critical components to support and stabilize the load between the two front axles. Computer-aided engineering (CAE) simulation has been used for stress analysis to evaluate the various forces influencing the failure of LS rod. Failure analysis is carried out for different rough road (RR) conditions. Road load data acquisition is conducted to validate the CAE results. Five sets of load-stabilizing rods were tested on different road test tracks in RR conditions. Strain gauges are used to measure the maximum stresses and tensile force induced in the LS rod. Fracture failure has been detected at the weaker section in the LS rod. Keywords Computer-aided engineering (CAE) Stress concentration Multi-body simulation (MBS) Road load data acquisition (RLDA) Rough road (RR)
P. Thangapazham L. A. Kumaraswamidhas (&) Department of Mining Machinery Engineering, Indian Institute of Technology (ISM), Dhanbad 826004, India e-mail: [email protected] D. Muruganandam Department of Mechanical Engineering, Jeppiaar Institute of Technology, Chennai 631604, India
Introduction The suspension system with load-stabilizing rod is predominantly used in heavy-duty mining vehicles. This vehicle has two front axles, which stabilize and redistribute the load between them. The suspension system is fitted with parabolic leaf springs, which possess high strength, are lighter and possess high fatigue strength [1]. This suspension system is incorporated with the steering link mechanism. The suspension system experiences varied shock loads depending on road conditions, gradient level, speed and load on the vehicle. The suspension system plays a critical role in the vehicle. The leaf spring offers higher level of safety during static and dynamic conditions [2]. The leaf spring absorbs shock loads and reduces their impact on chassis frame. The LS rod fixed between the left and the right sides of both front axles is supported at the center with the frame. LS rod helps to prevent the roll moment of the vehicle by transferring the load from one side to the other by undergoing torsion and ensures better stability. The shock absorber helps to dampen the vibrations and arrests swiveling motion of the leaf springs. In the present work, load-stabilizing rod is analyzed through CAE on both front axles. The LS rod is connected between both axles spring with special mounting a
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