The influence of modelling weld effects when optimizing thin-walled structures for crashworthiness

Kennie Berntsson, Mihkel Kõrgesaar, Bruno Reinaldo Goncalves, Jani Romanoff

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)


This study evaluates the consequences of modelling a weld-generated Heat Affected Zone when optimizing lightweight steel structures for crashworthiness. A case study on the resistance of an X-core sandwich panel is presented using a Particle Swarm Optimization-algorithm to search the design space for optimal solutions. Structures are developed by procedures including-and excluding a HAZ effect and later compared. The developed structures show distinct differences in terms of geometry, energy absorbed per unit mass, failure mode and sensitivity to HAZ material properties. Highlighting the importance of a proper set up for structural optimization, these findings question the validity of omitting weld effects when optimizing for crashworthiness.

Original languageEnglish
Title of host publicationProceedings of the 29th International Ocean and Polar Engineering Conference, ISOPE 2019
EditorsJin S. Chung, Odd M. Akselsen, HyunWoo Jin, Hiroyasu Kawai, Yongwon Lee, Dmitri Matskevitch, Suak Ho Van, Decheng Wan, Alan M. Wang, Satoru Yamaguchi
PublisherInternational Society of Offshore and Polar Engineers
Number of pages8
ISBN (Print)9781880653852
Publication statusPublished - 2019
MoE publication typeA4 Article in a conference publication
Event International Ocean and Polar Engineering Conference - Honolulu, United States
Duration: 16 Jun 201921 Jun 2019
Conference number: 29

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792


Conference International Ocean and Polar Engineering Conference
Abbreviated titleISOPE
Country/TerritoryUnited States


  • Crashworthiness
  • Laser welds
  • Particle Swarm Optimization
  • Sandwich panels
  • Steel structures
  • Thin-walled structures


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