Details of Grant 

EPSRC Reference:	GR/S08107/01
Title:	Dislocation plasticity modelling of fatigue and fracture: connecting physics to engineering
Principal Investigator:	Deshpande, Professor V
Other Investigators:
Researcher Co-Investigators:
Project Partners:	Brown University Columbia University
Department:	Engineering
Organisation:	University of Cambridge
Scheme:	First Grant Scheme Pre-FEC
Starts:	15 September 2003	Ends:	14 September 2006	Value (£):	115,537
EPSRC Research Topic Classifications:	Eng. Dynamics & Tribology Materials testing & eng.
EPSRC Industrial Sector Classifications:	Transport Systems and Vehicles
Related Grants:
Panel History:
Summary on Grant Application Form
Conventional descriptions of plastic deformation have found applications from the length scale of large structures to the length scale of grains in polycrystalline materials. With continued miniaturisation the limit to the applicability of continuum descriptions is reached and fully atomisfic, quasicontinuum and discrete dislocation descriptions are typically employed in material simulation, depending on the length scale of interest. In the discret dislocation formulation, dislocations as carriers of plastic deformation are represented discretely but interatomic interactions are averaged out througl elasticity thus making this technique Ideally suited for computational modelling at the micron scale. This Is a growing area of research internationally ; it is expected to motivate simulation tools for the virtual testing of materials and design of micro-mechanicaVelectronic components. It is important thr this activity is represented in the UK. Here we propose to apply the discrete dislocation plasticity framework to investigate fracture and fatigue crack growth in crystalline metals. These problems are inherently multi-scale with the physical process of separation taking place on an atomic scale with t1 state at this scale in general determined by all scales up to the macroscopic scale of the component. The aim is to bridge atomic fracture description with continuum mechanics and use the existing understanding of dislocation mechanics to extend and refine the discrete dislocation methodology.
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Organisation Website:	http://www.cam.ac.uk