Accepted Papers


  • Analytical Bending Analysis of A Circular Sandwich Plate Under Distributed Load
    Hamed Vahdati Zadeh and Masoud Tahani, Ferdowsi University of Mashhad, Iran
    ABSTRACT

    In this paper, bending analysis of a circular sandwich plate under distributed load with simply supportedand clamped boundary conditions is investigated. First, the governing equations ofthecircular sandwich plate are obtained and they are solved using the Bessel functions. Then in order to validate the correctness of analytical results, numerical finite element method is used and its results are presented in the forms of contours and graphs. The results indicate that under distributed load, maximum deflection happens at 0.3 of outside radius, away from centre,and minimum deflection occurs at the outer edge of the circular sandwich plate.The results from analytical and numericalmethods are compared and it shows that analytical method provides an acceptable accuracy

  • Evaluating Two-Dimensional Warranty Reserve with Accounting for Usage Intensity
    Ahmed Farouk Abdul Moneim1, Mootaz Ghazy1 and Mahmoud Hassan2, Arab Academy for Science and Technology and Maritime Transport (AASTMT), Alexandria, Egypt1, Misr University for Science and Technology (MUST),Giza, Egypt2.
    ABSTRACT

    Evaluating warranty reserve fund is one of the most intricate problems undertaken by sellers. Many researchers introduced two dimensional models to build realistic models for evaluating warranty cost as a function of product age and its usage extent within a specified warranty period. Most researchers assumed that customers have similar attitudes with respect to usage. However, such similar attitudes cannot be guaranteed. The present work proposes a new random parameter γ in the failure rate model in order to account for the random variation of usage intensity and its effect on the product characteristic life. Expected value of warranty reserve was calculated using mathematical formulas. Furthermore, Monte Carlo simulation was used to calculate warranty reserve for different policies at different risk probabilities.