City University of Hong Kong
To ensure that the material has the desired property during its design, a coherent framework of understanding and modelling capability has been developed, spanning the length and time scales, to relate macroscopic mechanical behaviour of materials to the underlying microstructural processes involved. This approach was used to investigate i) fatigue and ii) impact behaviours of materials including light metals, cellular materials and porous materials for transport and biomedical applications. The influence of 3D pore characteristics upon fatigue damage evolution was quantified using x-ray microtomography of interrupted fatigue test specimens. A multiscale, through-process model was then established to evaluate the fatigue behaviour by tracking the predicted microstructure and residual stress evolved in the manufacturing processes to cyclic service loading. The progressive damage mechanism under impact loading was investigated on cellular materials (Ti foam scaffolds, metallic hollow sphere foams etc.) by the extensive experimental measurement of mechanical properties and validating models.
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Event: |
MEEM Seminar 0708_032 |
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Date: |
13 June 2008 (Friday) |
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Time: |
10:30am |
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Venue: |
Room B4701 |
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Speaker: |
Dr. Peifeng Li |
LI Peifeng received his PhD degree in Material Science at Imperial College (London) in 2006. He is now working on Solid Mechanics and Materials Engineering Group at the University of Oxford. His research has focused on improving understanding of the relationship between the microstructure of materials and the mechanical properties through multi-scale computational simulation and experimental strategies. Applications include light metals, cellular materials and porous materials for transport applications. His current research interests are in the areas of mechanics of materials, and materials modelling and characterisation.
Enquiry: MEEM General Office (Tel: 2788 8420 Email: mego@cityu.edu.hk )