Multi-spot ultrasonic welding of thermoplastic composite single-lap joints: Effect of spot spacing and number of spots on weld strength

T. Zhao, I. Tsakoniatis, C. Rans, I. F. Villegas, R. Benedictus

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

Thermoplastic composite spot welded joints are more well-suited for carrying shear load rather than peel load. However, peel load is difficult to be eliminated in single-lap joint configuration. In this paper, a series of mechanical tests were carried out to study the effects of the spot spacing and the number of welded spots on the secondary bending and subsequently on the strength of the multi-spot welded joints. Based on that, a comparative study was performed on the load-carrying capability of multi-spot welded and mechanically fastened joints assembled with multi-row fasteners. It was found that, by increasing the spot spacing and the number of welded spots, the secondary bending of the multi-spot welded joints can be effectively decreased, which eventually results in a comparable load-carrying capability with respect to the mechanically fastened joints.

Original languageEnglish
Title of host publicationECCM 2018 - 18th European Conference on Composite Materials
PublisherApplied Mechanics Laboratory
Number of pages8
ISBN (Electronic)9781510896932
Publication statusPublished - 2020
EventECCM18: 18th European Conference on Composite Materials - Athens, Greece
Duration: 24 Jun 201828 Jun 2018
Conference number: 18
http://www.eccm18.org/

Publication series

NameECCM 2018 - 18th European Conference on Composite Materials

Conference

ConferenceECCM18: 18th European Conference on Composite Materials
Abbreviated titleECCM18
Country/TerritoryGreece
CityAthens
Period24/06/1828/06/18
Internet address

Keywords

  • Mechanical behaviour
  • Secondary bending
  • Spot welded joint
  • Thermoplastic composites

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