ISO 18166 2026 _数值焊接模拟——实施与文档记录

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Reference number

Numerical welding simulation—

Execution and documentation

Simulation numérique de soudage —Exécution et documentation

ISO 18166:2026(en)

International

Standard

ISO 18166

First edition

2026-01

◎ISO 2026

ISO 18166:2026(en)

◎ISO 2026

be reproduced or utilized otherwise in any form or by any means,electronic or mechanical,including photocopying,or posting on

the internet or an intranet,without prior written permission.Permission can be requested from either ISO at the address below

or ISO's member body in the country ofthe requester.

ISO copyright office

CP 401·Ch.de Blandonnet 8

CH-1214 Vernier,Geneva

Phone:+41227490111

Email:copyright@iso.org

Website: www.iso.org

Published in Switzerland

iii

ISO18166:2026(en)

Contents Page

Foreword......................................................................................................................................................................V

Introduction............................................................................................................................................................... vi

1 Scope............................................................................................................................................................... 1

2 Normative references...................................................................................................................................1

3 Terms and definitions .................................................................................................................................. 1

4 Abbreviated terms....................................................................................................................................... 3

5 Principle.......................................................................................................................................................... 4

6 Scientific Computation Tools (SCT.)....................................................................................................... 4

7 Required data for simulation..................................................................................................................... 5

8 Formulation of the problem and establishment of the simulation strategy......................................5

9 Establishment of the input parameters.....................................................................................................8

9.1 Input data .......................................................................................................................................... 8

9.2 Simulation template.......................................................................................................................... 8

10 Geometry and mes...................................................................................................................................... 8

10.1 Geometry and mesh of welded joint................................................................................................. 8

10.2 Mesh size.............................................................................................................................................. 8

10.3 Type of elements ................................................................................................................................ 8

10.4 Modelling of the filler materia ..........................................................................................................9

11 Performing the simulation.......................................................................................................................... 9

11.1 Code verification..................................................................................................................................9

11.2 Thermal and metallurgical computation ................................................................................... 10

11.2.1 General ............................................................................................................................... 10

11.2.2 Focus on metallurgical transformations .......................................................................... 10

11.2.3 Modelling of heat source ................................................................................................... 10

11.2.4 Boundary and initial thermal condition........................................................................... 11

11.3 Thermomechanical computation for residual stresses prediction............................................... 11

11.3.1 General ............................................................................................................................... 11

11.3.2 Model parameters adjustments.......................................................................................... 11

11.3.3 Materials with phase transformations............................................................................... 11

11.3.4 Boundary and initial thermomechanical conditions....................................................... 11

11.4 Monitoring the solution during computation............................................................................... 12

12 Simulation post-processing................................................................................................................... 12

12.1 Genera .............................................................................................................................................. 12

12.2 Cross-section of fusion zone ........................................................................................................... 12

12.3 Transient evolution of temperatures...............................................................................................12

12.4 Phases and residual stresses and strains distributions............................................................... 12

13 Comparing/challenging the resuls ....................................................................................................... 13

13.1 Genera .............................................................................................................................................. 13

13.2 Calculation verification................................................................................................................... 13

13.3 Validation ......................................................................................................................................... 14

13.3.1 General.................................................................................................................................. 14

13.3.2 Validation proces............................................................................................................... 14

13.3.3 Lack of knowledge............................................................................................................... 14

13.3.4 Validation experiment guidelines ......................................................................................15

13.3.5 Additional validation and verification activities ............................................................... 15

14 Uncertainty quantification.......................................................................................................................15

15 Reporting/display of results................................................................................................................... 16

15.1 Genera...............................................................................................................................................16

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ReferencenumberNumericalweldingsimulation—ExecutionanddocumentationSimulationnumériquedesoudage—ExécutionetdocumentationISO18166:2026(en)InternationalStandardISO18166Firstedition2026-01◎ISO2026iiISO18166:2026(en)COPYRIGHTPROTECTEDDOCUMENT◎ISO2026Allrightsreserved.Unlessotherwisespecified,orrequiredi...

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