Prediction of Defects in Material Processing

2. The Finite Element model

2. The Finite Element model

In order to define the LATIN algorithm, we introduce here a convenient manner to describe the finite element model. The considered thermo-mechanical problem involves small strains, small displacements, elasticity, and contact producing thermo-mechanical coupling. Equations are given for each sub-domain ?. Boundary conditions are given for interfaces between a sub-domain ? and a sub-domain ?', and for interfaces between a sub-domain ? and the boundary ?? of the system. A mesh is used to describe the displacement field and the temperature field T by introducing matrix of shape functions N U and N T, and Finite Element degrees of freedom and respectively. The shape functions N U and N T define two subspaces and T respectively. We assume that these subspaces are large enough to represent accurately the evolution of the gradients of and T. The time interval ]0, t f] is divided into time steps ] t j, t j+ 1]. The forward Euler scheme is used to solve the time differential equations.

2.1. Equations defined inside ? ? ?

Inside each sub-domain ? the following conditions must be satisfied. There are initial conditions for temperatures and stresses ?. Stresses, normal stresses over ??, temperatures, heat transfer , internal energy e normal heat transfer ? over ?? and heat dissipation r, must satisfy equilibrium conditions at...

UNLIMITED FREE
ACCESS
TO THE WORLD'S BEST IDEAS

SUBMIT
Already a GlobalSpec user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your GlobalSpec Experience

Category: Heat Exchangers
Finish!
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.