PSI - Issue 33

Imam Abdul Majid et al. / Procedia Structural Integrity 33 (2021) 35–42 Majid et al. / Structural Integrity Procedia 00 (2019) 000–000

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From the analysis results on the chassis, safety factor maximum at 15 and minimum at 1.153. This result can be seen with a colour orientation after the process simulation done. The simulation of the designed ladder frame type chassis referring to AC Cobra, including displacement, stress, strain, reaction force, and safety factor based on FE analysis, is presented in Table 4.

Table 4. The overall results of the designed chassis analysis using FE analysis. Result Parameter

Minimum

Maximum 0.3359 mm 0.03646 mm 0.04867 mm 0.02109 mm 264.4 MPa 194 MPa 26.79 MPa 4.515 x 10 -4 6.294 x 10 -4 4.982 x 10 -4

0.0 mm -0.02396 mm -0.3359 mm -0.02005 mm 0.0 MPa -38.15 MPa -262.2 MPa -6.333 x10 -4 -6.196 x10 -4 -5.52 x10 -4

Total XX YY ZZ

Displacement

Von-Mises 1 st Principal 3 rd Principal

Stress

XX YY ZZ

Strain

368.6 N 219.3 N 257.7 N 281.4 N

0 N -208 N -299.9 N -306.2 N

Total XX YY ZZ

Reaction Force

Safety Factor

-

1.153

15

6. Conclusions Analysis of the designed car chassis referring to AC Cobra is carried out, aiming to find out how much displacement, stress, strain, reaction force, and safety factor. Computational investigation of ladder frame chassis referring to AC Cobra has been carried out. In general, the chassis is safe enough to be used for sports car because it has already tested through FEA simulation. The maximum displacement is 0.3359 mm with a 1.153 safety factor, and the maximum von-Mises stress of the chassis is 264.4 MPa. It means that the chassis can hold 4900 N vertical load and still deform elastically and even under allowable material properties. Modern engineering CAD tools and FEA software were extensively applied, which also contributed to reliable project during the endurance and functional tests. References Ary, A.K., Prabowo, A.R., Imaduddin, F., 2020. Structural assessment of alternative urban vehicle chassis subjected to loading and internal parameters using finite element analysis. Journal of Engineering Science and Technology 15, 1999-2022. BPS-Statistics Indonesia 2018, accessed 3 August 2020 Bathe, K.J., 2014. Finite Element Procedures. Prentice Hall, New Jersey, US. Beermann, H.J., 1989. The Analysis of Commercial Vehicle Structures. Mechanical Engineering Publications Ltd., London, UK. Caesar, B.P.P., Hazimi, H., Sukanto, H., Prabowo, A.R., 2020. Development of novel design and frame structural assessment on mitutoyo’s auto checking hardness machine using reverse engineering approach: Series HR-522 hardness tester. Journal of Engineering Science and Technology 15, 1296-1318 Cook, R.D., 1995. Finite Element Modeling for Stress Analysis. John Wiley & Sons, New Jersey, US. Ghalazy, N.M., 2014. Applications of finite element stress analysis of heavy truck chassis: survey and recent development. Journal of Mechanical Design and Vibration 2, 69–73. Goodnow, F. and Zalulec, M., (2004), 2005 Ford GT – Melding the Past and the Future. SAE Technical Paper, 2004-01-1251. He, J., Fu, Z.F., 2001. Overview of modal analysis. Modal Analysis. Butterworth-Heinemann, Oxford, UK. Mohammed, N. A., Nandu N. C., Krishnan. A., Nair A.R., Sreedharan P., (2018), Design, Analysis, Fabrication and Testing of a Formula Car Chassis, Materials Today: Proceedings, , Issue 11, Part 3, 24944-24953(5). Ozes, C., Kuralay, N., 2002. Stress analysis of a truck chassis with riveted joints. Finite Elements in Analysis and Design 38, 1115-1130. Prabowo, A.R., Laksono, F.B., Sohn, J.M., 2020. Investigation of structural performance subjected to impact loading using finite element approach: case of ship-container collision. Curved and Layered Structures 7, 17-28. Salzano, A., Klang, E., 2009. Design, Analysis and Fabrication of a Formula SAE Chassis. North Carolina State University, North Carolina, US. Spinelli, D. M., Simões, S., Gonçalves, A.A., Bothe, K., 2001. Modular bus chassis development using modern simultaneous engineering tools. SAE Technical Papers, 2001-01-3827. Veloso V., Magalhães H.S., Bicalho G.I., Palma E.S., 2009, Failure investigation and stress analysis of a longitudinal stringer of an Automobile Chassis. Engineering Failure Analysis 16, 1696-1702.