Formation of the equivalent heat source for calculating strains in structures in electron beam welding

Abstract

A method for determining the distribution of the power of an equivalent source, based on the numerical solution of the inverse heat conductivity problem, is described. It is shown that the equivalent source can be used for solving the thermal-strain problems in the MARC package, in which it is sufficient to describe in the special sub-program the movement of the line of action of the beam inside the finite element mesh and calculate the distribution of the power for the mesh parameters.

Keywords::

• electron-beam welding
• heat source
• cross-section of seam
• capacity

Acknowledgements

The authors are grateful to V. Ploshikhin (Bayreuth GmbH, Germany), R. Il'tyshenko (Airbus, UK) and K. Haimerdinger (EADS, Germany) – participants of the project INTAS-Airbus Ref. No. 04-80-6951 (SIMWEST) in which this study was funded.