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.
|Title of host publication||Analysis and Design of Marine Structures|
|Publication status||Published - 2013|