C12.

Project title: High Strain-rate Deformation of Polymer Matrix Composites

As polymers and their composites are being increasingly used in load bearing applications, a thorough understanding about their behaviour under impact rate of loadings is becoming important. Conventional Izod or Charpy type of impact tests do not provide sufficient data for the design and fundamental understanding of materials under high strain rate deformation. A commonly used technique for high strain-rate characterization of materials is the split Hopkinson pressure bar (SHPB) technique. Using the SHPB, compression, tensile and shear stress-strain curves under the strain-rate range of a few hundred to a few thousand per second can be measured.

In this project, the high strain-rate stress-strain behaviour of particulate or fibre reinforced polymer matrix composites will be measured using the SHPB technique. The correlation between stress-strain behaviour, strain-rate, and microstructure will be investigated.

Supervisor: Prof Robert K Y Li (aprkyl@cityu.edu.hk)

Suitable for: M.Phil./Ph.D.

Prerequisite: A degree in Mechanical Engineering, Civil Engineering or Materials Science is required. Furthermore, the candidate should have a strong interest in solid mechanics and experimental work. Some basic computer programming knowledge is also needed.