Modular RoRo deck

Modular decks for RoRo vessels (non-metallic)

Custom-made hull

Custom made hull for offshore vessel

Fully outfitted and modularised cabin

Multi material lightweight cabin for passenger ships

Panel system (bio-based and other)

Lightweight components for high loads and fire class

Composite block on steel deck

Composite superstructure module on steel deck for multi purpose vessels

Versatile walls

Integration of system for internal walls and superstructure
of cruise ships into shipyard processes

Lightweight rudder flap

Lightweight rudder flap

3D-printed propeller blade

Propeller blades by additive manufacturing

Panel system (truss structure)

Modular light system for less critical internal walls and superstructure

Aluminium composite panels

Lightweight aluminium and composite walls for work boats

High tensile steel decks

Lightweight decks using high tensile steel in cruise ships

Design details (high tensile steel)

Highly loaded structural details from high tensile steel
in passenger and research vessels

Patch repair - composite overlays

Composite overlay to repair and improve metallic and
non-metallic structures

RoRo deck

custom-made hull

cabin system

aluminium panels


versatile walls

rudder flap

propeller blade

truss structures

bio-based panels

steel decks

steel details

patch repair

Composite overlay to repair and improve metallic and non-metallic structures

State of the Art

In over 30 years of global operation under harsh environments, maritime products, especially tailor-made structures with decreased safety margins and new materials, need specific, easy to handle and low-cost repair technologies to be acceptable for owners and authorities. Composite patch over-lamination was successfully tested in several projects and has been applied e.g. for repair of aluminium aircraft structures as well as thick steel sections in offshore and pipelines. Composite patches work as crack arrestors for existing damages. Effects of composite over-lamination to improve fatigue life of welded joints have been studied sporadically. No systematic design and processing guidelines is available.


For wider maritime applications, both for repair and joint fatigue improvement dimensioning, design, material selection and processing procedures will be established on a systematic basis and verified by tests and parameter studies (statistical models) on fatigue, aging and corrosion, first at lab scale. This will serve as a basis for quality assurance guidelines and approval by class societies. Tests will allow for directly comparing the effect of over-laminated specimens against untreated ones, as well as with the composite demos. Finally, real-life application tests and long-term monitoring of the effects will be carried out at a shipyard as well as on-board a real ship.


A comparatively easy-to-apply, robust and cheap method to extend the lifetime of many applications, within and beyond the maritime sector. Methods to strengthen and improve critical joints are already in use in other transport modes, but are new for the maritime sector, partially owing to the need for worldwide application, extreme environmental conditions and lacking long-term experience. In future, it may become a valuable method to assist various lightweight applications in different materials.