Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Adhesive bonding in aluminum ship building
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Naval Systems.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This paper investigates the potential to use adhesive bonding in high speed aluminum crafts with the purpose of replacing welding. By using adhesives, the higher strength of the aluminum prior to welding could be utilized thus allowing for thinner plating, in turn enabling lighter hulls. Avoiding welding would also eliminate the heat distortions that occurs today. These cost valuable production time and thereby increases the cost of the finished craft. The research question for this paper is formulated as:Can weight and/or costs be reduced by replacing welding with adhesive bonding?To answer the question a case study has been performed at Dockstavarvet where four different joints on the Interceptor Craft 16.5M have been redesigned using adhesive bonding instead of welding. A number of different adhesive types have been considered and Second generation acrylics, silicone, silane modified polymer, polyurethane and epoxy adhesives were evaluated in the text resulting in the conclusion that an epoxy is the most suitable adhesive. For this study the adhesive DP490 by 3M has been used to design the joints against Lloyds and DNV-GL rules as well as maximum shear stress in the adhesive. For each joint three different designs have been developed using FEA, allowing 20, 10 and 3 MPa of shear stress in the adhesive. FE simulations were also used to see the effects on the effective flange caused by the elasticity of the adhesive. This gave the result that with adhesives stiffer than 1 GPa the effective flange is fully utilized. To estimate the potential time savings two sample panels were manufactured, one welded and the other adhesively bonded.The result of the analysis is that in the best case, equivalent to the strength of the adhesive during the first years, around 15 % weight can be saved in the hull. However, considering long term effects such as cyclic and environmental fatigue the weight is instead increased compared to welded joints. It is also concluded that production time is saved by using adhesives and that this cost reduction outweighs the increased cost of the adhesive.

Place, publisher, year, edition, pages
2017. , p. 50
Series
TRITA-AVE, ISSN 1651-7660 ; 2017:69
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-223331OAI: oai:DiVA.org:kth-223331DiVA, id: diva2:1183380
External cooperation
Dockstavarvet
Supervisors
Examiners
Available from: 2018-02-20 Created: 2018-02-16 Last updated: 2018-02-20Bibliographically approved

Open Access in DiVA

No full text in DiVA

By organisation
Naval Systems
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 32 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf