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Using LS-DYNA for Thermal-Stress Modelling Using LS-DYNA for Thermal-Stress Modelling

"Using LS-DYNA for Heat Transfer & Thermal-Stress Modelling"
May 8 9, 2007, Grafing near Munich, Germany

Presented by Dr. Art Shapiro:

Dr. Shapiro has been involved with computational finite
element heat transfer since 1980. He has been responsible
for heat transfer code development in LS-DYNA since the
company, LSTC, was founded in 1987.

Organized by:

CADFEM the German LS-DYNA Distributor
Host of the CADFEM Users´ Meeting 2007

Course Objective:

The course objective is to provide an understanding of
computational finite element heat transfer. Presentations 1-8
focus on the various heat transfer modeling issues one must
understand in using LS-DYNA, including:
How to choose a thermal time step size
How to apply thermal initial and boundary conditions
How to solve nonlinear thermal problems
How to choose the best implicit equation solver
This is followed by an introduction to thermal-stress
modeling with a focus on hot sheet metal forming, including:
How to choose a mechanical and thermal time step
How to apply thermal-mechanical contact
How to choose a thermal-mechanical material model
Workshop problems are used to illustrate the points made in
the lectures.


More information an online registration:
http://www.cadfem.de/LS-
DYNA.5311.0.html?&tx_semcf_pi1[single]=2851&cHash=36bab4d921


Hot Forming Process temperature fringe patterns





Presentations include:
1.

Introduction Learn to create a KEYWORD input file to solve
for the thermal expansion of an aluminum block.
2.

Mathematical Theory brief, but cant be avoided
3.

Time Step Control Learn how to select a time step size, use
the variable time step option, and understand the difference
between fully implicit and Crank Nicolson time integration
methods.
4.

Boundary Conditions Learn how to define temperature,
flux, convection, and radiation boundary conditions. Learn
how to hand calculate a convection heat transfer coefficient.
5.

Nonlinear Problems Learn nonlinear heat transfer by
solving a solid-liquid phase change problem.
6.

Equation Solvers - Learn the advantages and disadvantages
between the Gauss direct solvers & conjugate gradient
iterative solvers in LS-Dyna.
7.

Thermal Contact Learn thermal contact modeling issues by
solving a sheet metal forming problem with thin and thick
shells.
8.

Miscellaneous Learn special applications including
powders, welding, induction heating, and thermostat control.
9.

Thermal-stress coupling An introduction to coupled thermal
stress modeling with a focus on sheet metal forming
applications.