Now showing 1 - 2 of 2
  • Publication
    Validation of foam filled tube model and optimization result using Weibull distribution
    (LAJSS, 2020)
    Fauzan Djamaluddin
    ;
    Ahmad, Z. A.
    ;
    Passenger safety and low fuel consumption rate are the most important factors that need to be considered when designing modern transportations. This study validates the crash behavior and optimum values of foam-filled structures under the dynamic oblique impact using the Weibull distribution. The optimization method aimed to absorb maximum energy with minimum peak crushing force. Furthermore, the metamodel and optimization techniques such as RBF and NSGA-II were used to ensure accurate validation of the Weibull distribution method. The result showed that the finite element model is comparable to the experimental data in the reference, while the metamodel method, which is directly verified, affects optimization results. The Weibull distribution method shows that the optimum value and the simulation have good accuracy or R2 > 0.85.
  • Publication
    Deformation and optimization of double tube under bending loads
    (Praise Worthy Prize, 2020)
    Fauzan Djamaluddin
    ;
    Ilyas Renreng
    ;
    A comparison of optimization values for empty aluminum circular tubes and double circular tubes containing foam under flexible loading is presented in this paper. Thin-walled tube is widely used in the vehicle structure for impact mitigation especially on the vehicle door. In this study, AA6063 T6 aluminum alloy tubes were filled with foam with both ends supported and subjected to quasi-static bending. Finite Element (FE) modeling and analysis has been performed using finite element software. The developed FE model has been experimentally validated and good agreements have been observed between experiment and simulation results. The deformation of the tube under bending load was studied with variations in thickness (t) and diameter (d) of the tube wall. The design of various objective optimization (multi objective optimization) is developed with considering two crashworthy performance that conflicting each other namely Peak Crush Force (PCF) and energy absorption per unit mass (SEA). In order to fulfill these purposes, Radial Base Function (RBF) and Non-dominated Sorting Genetic Algorithm (NSGA II) are adopted. It was observed that double circular tube containing foam exhibit higher energy absorption than that of an empty double circular tube. As such, this structure could be recommended as a power absorbent component such as a side beam on a vehicle door.
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