NUMERIC SIMULATION OF ROAD DEFORMATION IN LABORATORY SCALED ROLLING RESISTANCE TEST USING 3D FINITE ELEMENT METHOD

• Main Author: Bhaskara, Irfan
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57524
• Institution: Institut Teknologi Bandung

Rolling resistance is external forces that are opposite to the direction of motion of a vehicle moving on a road. Laboratory scaled rolling resistance test can be simulated numerically using the threedimensional finite element method using RS3 software. The rolling resistance test track used is a loose sand track with dimension 10 x 2 x 0.5 m. The rolling resistance test has several variables of total weight (1 kN, 2 kN, 3 kN, 4 kN), tire pressure (100 kPa, 140 kPa, 180 kPa), and tire type (radial, bias, tractor). The deformation in the RS3 numerical simulation has a maximum difference of 10% with the results of laboratory tests. Determination of deformation using the approach analysis of material displacement in the direction of the vertical axis (maximum Z Displacement). The result of deformation in the numerical simulation is between 0.31-1.7 cm, with the back analysis of Modulus Young (E) in the simulation is 5-10 MPa. Rolling Resistance value will increase with increasing deformation in numerical simulation. However, the influence of the deformation factor on the Rolling Resistance value is not always linear at certain tire pumping pressure conditions because of the contact area that reaches its ideal condition to get the smallest Rolling Resistance value. The equation of the relationship between the numerical simulation deformation (z) and the optimum rolling resistance (RR) for each tire in total weight 1-4 kN in the laboratory scaled rolling resistance test are radial tires 140 kPa (RR = 4.2196 z – 1.3817), bias tires 140 kPa ( RR = 4.5591 z – 0.6977), and tractor tires 100 kPa (RR = 0.2978z5.27) where RR is in kN and z is in cm.