International Organization for Standardization

Numerical welding simulation - Execution and documentation - First Edition
 N TS 18166

Annotation

This Technical Specification provides a workflow for the execution, validation, verification and documentation of a numerical welding simulation within the field of computational welding mechanics (CWM). As such, it primarily addresses thermal and mechanical finite element analysis (FEA) of the fusion welding (see ISO/TR 25901:2007, 2.165) of metal parts and fabrications.

CWM is a broad and growing area of engineering analysis.

This Technical Specification covers the following aspects and results of CWM, excluding simulation of the process itself:

— heat flow during the analysis of one or more passes;

— thermal expansion as a result of the heat flow;

— thermal stresses;

— development of inelastic strains;

— effect of temperature on material properties;

— predictions of residual stress distributions;

— predictions of welding distortion.

This Technical Specification refers to the following physical effects, but these are not covered in depth:

— physics of the heat source (e.g. laser or welding arc);

— physics of the melt pool (and key hole for power beam welds);

— creation and retention of non-equilibrium solid phases;