Subsonic, transonic and supersonic interfacial crack propagation in piezoelectric/piezomagnetic layered materials

Dr Su, Kai Leung   (Principal Investigator (PI))

Professor Tang Chen   (Co-Investigator)

Professor Feng Wenjie   (Co-Investigator)

36

2016-09-01

636846

Subsonic, transonic and supersonic interfacial crack propagation in piezoelectric/piezomagnetic layered materials

dynamic fracture, impact, interfacial crack, piezoelectric/piezomagnetic

Structure,Materials

Engineering (E)

17223916

General Research Fund (GRF)

2016

Completed

1) To develop a simple mechanical-electric testing system and carrying out a pioneering experimental study on the dynamic fracture of piezoelectric/piezomagnetic layered structures under impact loading; 2) To originally establish plane problem models for piezoelectric/piezomagnetic layered composite structures with interfacial cracks moving at different speeds, and derive governing equations and corresponding solutions for different crack surface electromagnetic conditions; 3) To derive new crack-tip enrichment functions of the X-FEM and explore the application of the X-FEM to the moving interfacial crack problems of layered ME composites; 4) To explore the effects of material properties, geometric sizes, loading magnitudes on the dynamic fracture behaviors of interfacial cracks in layered ME composite structures; 5) To develop a basic theoretical reference for the design and reliability assessment of ME devices based on the theoretical and experimental results.