Numerical analysis of cracked marine structures repaired with composite patches

E. I. Avgoulas, Vasileios Karatzas, I. K. Zilakos, N. G. Tsouvalis

Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review


The vast majority of ships and marine structures are inevitably facing typical defects such as corrosionand cracks. A new and quite promising repair method is using composite material patches. This workconsists of a numerical simulation of such repairs in a cracked structural component of an Aframax tanker. FollowingIACS’s Common Structural Rules, cracks of different lengths and in two locations around the manholeof a hopper tank transverse web frame were modeled. Different composite patch configurations were appliedand studied for each crack case. The stress field in the area around the crack was calculated, along with thestress intensity factors, prior and after composite patch repairing. Results showed that stresses are significantlyreduced and that the reduction of the stress intensity factor after the repair ranges between 51% and 93%compared to the unpatched case, thus significantly slowing down, or in some cases even practically arresting,the crack growth.
Original languageEnglish
Title of host publicationAnalysis and Design of Marine Structures
EditorsJ. Romanoff
PublisherCRC Press
Publication date2013
ISBN (Print)978-1-138-00045-2
ISBN (Electronic)978-0-203-73285-4
Publication statusPublished - 2013
Externally publishedYes


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