finite element

In this paper, the systematic investigation of the stresses occurring in a rod bearing cap bolted joint is carried out by considering a concentrically clamped rod bearing cap bolted joint.  The aim of this study is to develop a 2D finite element model to determine occurring stress in bolted joints during all cases of bolted joint and to compare VDI-Directives.  For this aim, the bolt load and part load are analytically calculated based on the axial load.  The assembly stress, working stress, and alternating stress are calculated and simulated based on the  introduction of a load factor $n$.

In this work, the MOSFET device is considered.  The carrier densities in the MOSFET are modeled by the drift-diffusion equation.  We manipulate the formulas of the charge density at the equilibrium in order to derive a simple Poisson's or Laplace's equation.  To formulate a shape optimization problem, we have defined a cost functional.  The existence of an optimal solution is proved.  To solve the involved optimization problem, we have designed a numerical approach based on the finite element method combined with the genetic algorithm.  Several numerical examples are established to prove th