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Projects: Projects for Investigator
Reference Number EP/G015848/1
Title Fibre waviness defects in composite structures
Status Completed
Energy Categories Renewable Energy Sources(Wind Energy) 50%;
Not Energy Related 50%;
Research Types Basic and strategic applied research 100%
Science and Technology Fields PHYSICAL SCIENCES AND MATHEMATICS (Metallurgy and Materials) 50%;
ENGINEERING AND TECHNOLOGY (Mechanical, Aeronautical and Manufacturing Engineering) 50%;
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Dr K Potter
No email address given
Aerospace Engineering
University of Bristol
Award Type Standard
Funding Source EPSRC
Start Date 01 May 2009
End Date 30 April 2012
Duration 36 months
Total Grant Value £250,921
Industrial Sectors Manufacturing; Transport Systems and Vehicles
Region South West
Programme Materials, Mechanical and Medical Engineering
Investigators Principal Investigator Dr K Potter , Aerospace Engineering, University of Bristol (99.999%)
  Other Investigator Professor M Wisnom , Aerospace Engineering, University of Bristol (0.001%)
Web Site
Objectives Linked to grant EP/G012938/1
Abstract Composites are now widely used in a wide range of applications. In the wind turbine and aerospace sectors recent innovations, including larger and more sophisticated structures, have driven the need for better understanding of failure of composite structures. Use of lower-cost process routes requires a need for better understanding of the inevitable defects in such composite structures.Failure ofwell-controlled flat composite panels is now generally well understood. However real manufacturedcomponents contain a range of stress concentrators, some associated with relatively controlled features such as joints, ply drops, sandwich panel closures and holes, some more uncertain associated with defects including fibre waviness, resin-rich areas and gaps at sandwich core breaks. The aim of theproject is to understand and model how such defects affect the strength of the structure.The project has three main strands: (i) characterising realistic defects in industrial components and in controlled laboratory specimens, (ii) identifying mechanisms of compressive failure under fatigue loading and developing predictive models for failure at waviness defects, validated with experiments, (iii)modelling of defect formation during processing. Case studies suggested by industrial partners Dowty and Vestas of a propeller and a wind turbine blade will be used. The models will be incorporated into software tools, in collaboration with Simulayt Ltd, for use in design
Publications (none)
Final Report (none)
Added to Database 27/10/08