IJIRST –International Journal for Innovative Research in Science & Technology| Volume 3 | Issue 02 | July 2016 ISSN (online): 2349-6010
Design Optimization of Truck Body Mohammad Mushtaque M. Tech Student Department of Mechanical Engineering WCEM, Nagpur
Dilip. G. Gangwani Professor Department of Mechanical Engineering WCEM, Nagpur
Abstract Handling and carrying of large quantities of materials in a truck body of varied construction upon the existing state of materials, physical properties and required operation which is to be performed is one of the task taken by the mechanical and the automobile engineers which are used for carrying sand, metals, iron ore and granite blocks. The truck body is the main part of the vehicle which contains a number of channels made up of mild steel or aluminum sheet metal. Most processing equipment units are focusing on the design of the truck body with various modifications necessary to minimize the stress and to improve the load factor of safety. In the design of truck body, a number of factors have to be considered. The most important factor is the selection of type of the body to perform the required operation in a satisfactory manner. The other selection criteria must be considered such as the induced stress and material properties. Vehicles and related structures disclosed in for mentioned patents mainly worked up on the design to increase the strength, to the reduce weight, and enhance configurability. Hence there exists a need for the industry sector to optimize the design of the dump truck body structure which allows maximizing dump truck payload capacity and simultaneously improving the strength, reducing the weight, and prolonged operational life. Keywords: truck body, static structural analysis, FEA, optimization _______________________________________________________________________________________________________ I.
INTRODUCTION
Today there is a demand on trucks not only on the cost and weight aspects but also on the improved and complete vehicle features and the overall work performance. In addition to this number of variants that are possible due to different types of designs and modernization call for several design iterations to arrive at a suitable combination. The project work deals with truck body. There is considerable scope to improve the design of their product. For optimization of body design, an existing model is chosen whose specifications are taken from the local industry. Objective: The Main Objectives of the Work is:
To reduce body weight. To determine the critical point having highest stress. To modify the design of truck body to get an optimized in terms of reducing weight and reducing stresses. Methodology:
Modeling of 3 d truck body using solid works Static analysis of the model in order to solve the problem formulation Optimization of the model
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Design Optimization of Truck Body (IJIRST/ Volume 3 / Issue 02/ 062)
II. CALCULATION Loading: ď€ ď€ ď€ ď€
The truck body is loaded with static forces from the material it carry. The load carrying capacity of the truck is 18 tons. Thus forces exerted = weight*9.81 =18000*9.81 =176580N Assuming that : ď€ 100 % of the forces acts at the bottom ď€ 10% on the sides ď€ 15% on the front ď€ Force acting on bottom on single node = 176580/65 =2716.61N ď€ Force acting on side on single node = 176580*0.1/65 =271.66N ď€ Force acting on front on single node = 176580*0.15/50 =662.175N Force acting on side = 176580 Ă— 0.1 = 17658N Case 1 Since there are 5 members and force acting on a single member= = 3531.6N đ??š 3531.6 đ?œŽ T= = đ??´ 879.16 đ?œŽT= 4.03N/Mm2 Case 2 Force acting on single channel 0.1 176580 Ă— = 1358.30N
17658 5
13
Thus,
∑fy = 0 Ra– 1358.30 = 0 Ra = 1358.30N ∑Ma= 0 Ma = 1358.30 Ă— 2133.6 Ma = 2898068.88N_mm By Bending Flexural formula: M Ďƒ = I Y 2898068.88 Ă— 24.75 Ďƒ= 586610.9 Ďƒ =122.07N/mm2 III. ANALYSIS Loading: The truck body is loaded with static forces from the material it carry. The load carrying capacity of the truck is 18 tons. Thus forces exerted = weight*9.81. Assuming that:
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Design Optimization of Truck Body (IJIRST/ Volume 3 / Issue 02/ 062)
100 % of the forces acts at the bottom 10% on the sides 15% on the front Solution:
Optimization:
IV. CONCLUSION The objective to optimize the design of truck body structure which allows maximizing truck payload capacity and simultaneously improvising the strength, reducing weight, and thereby providing prolonged operational life is achieved. REFERENCES [1] [2] [3] [4] [5] [6] [7] [8]
Sankararao Vinjavarapu1, Unnam Koteswararao, ““Design Optimization of Truck Body Floor for Heavy Loading” K.Radhakrishna, S. Srinivasa Rao ,“DESIGN AND ANALYSIS OF DUMP BODY ON THREE WHEELED AUTO VEHICLE” Mauritz Coetzee Axis Developments Ltd., Pretoria, South Africa, Heavy-Duty Lightweight, ANSYS Advantage, Volume I, Issue 2, 2007 www.ansys.com Sridhar Srikantan, Shekar Yerrpalli and Hamid Keshtkar, Durability design process for truck body structures, International Journal of vehicle Design, Volume 23, 2000. R.J. Yang, Ching-Hung Chuang, Dingdongs Che and Ciro Soto, New application of topology optimization in automotive industry, International Journal of vehicle Design, Volume 23, 2000. “Code of Practice for Construction and Approval of Truck Cabs, Truck Bodies and Trailers”, The Automotive Research Association of India publication, 2008 S.Timoshenko and D.H.Young, Engineering Mechanics, McGraw-Hill International publication 4th edition. PSG College of Technology, Design Data, DVP Printers Publication revised edition (1978).
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