Details of Grant 

EPSRC Reference:	GR/J42014/01
Title:	THE TEARING OF SHIPS' PLATING UPON GROUNDING (SHP 155)
Principal Investigator:	Atkins, Professor AG
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Electronic Engineering
Organisation:	University of Reading
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 1993	Ends:	30 September 1996	Value (£):	132,208
EPSRC Research Topic Classifications:	Eng. Dynamics & Tribology
EPSRC Industrial Sector Classifications:	Transport Systems and Vehicles
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Panel History:
Summary on Grant Application Form
To determine the resistance to crack initiation (plate denting, perforation and puncturing) and subsequent propagation of long tears in ships' plating. To be done both i) by experiments on full size and scaled plates and ii) by analytical investigations using proven methods of rigid plastic fracture mechanics for full size and scaled bodies. Guidelines will be given for likely extent of damage upon grounding, amount of cargo spillage etc. The resistance to crack initiation (plate denting, perforation and puncturing) and subsequent propagation of long tears in ships' plating will be investigated using experimental and analytical methods of rigid plastic fracture mechanics which have been successful in the solution of related problems in large deformation flow and fracture. Simple strain criteria, without allowance for biaxiality effects, are inappropriate for design in these circumstances. Better still is the use of proper fracture toughness data as proposed here. Such data will enable answers to be given to the problem of how long a tear is likely to be produced when a ship of a given mass and velocity strikes an obstruction and is brought to rest (and thereby, for example, what spillage of liquid cargo may occur). Guidelines will emerge from the study for the amount of damage that can be sustained before piercing and fracture occurs. The question of scaling from measurements on small samples and/or models versus the behaviour of large ships will be included as part of the study.
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Organisation Website:	http://www.rdg.ac.uk