Uncertainty Factors of a Finite Element Model using the Fuzzy Analysis Method

Mohamad Syazwan Zafwan, Mohamad Suffian and Syahiir, Kamil and Ahmad Kamal Ariffin, Mohd Ihsan and Abdul Hadi, Azman and Israr, M Ibrahim (2024) Uncertainty Factors of a Finite Element Model using the Fuzzy Analysis Method. Jurnal Kejuruteraan, 36 (1). pp. 123-132. ISSN 2289-7526

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Abstract

The recent advancement in manufacturing technology in the automotive and aerospace sectors has led to the invention of advanced structured material, which is lightweight and a complex geometry model that can be manufactured. As it is related to human safety and hazards, the need for uncertainty analysis in a structure before and after a manufacturing process is a primary concern. Thus, this paper analyzes the uncertainty parameters of a meshed finite element model in the geometry, boundary condition, load, and material properties. An uncertainty analysis numerical tool, the fuzzy analysis method, is applied in Excel-VBA as the simulation platform. Each uncertainty parameter is in a range of numbers, with a maximum and minimum value as the limit. The α-cuts determine the fuzzy analysis output on the membership function. The deterministic value of the variable is implemented for comparison purposes. The simulation result for the von-Mises stress analysis has significantly impacted the uncertainty analysis as its curve has surpassed the yield strength limit of the material. The simulation output for the displacement has a more considerable uncertainty dispersion when compared to the other results. This study helps to find a better security margin of a structure for its sustainability in the future.

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