student profile: Mr Lakshitha Fernando


Thesis work

Thesis title: Multi-material system to resist blast loads

Supervisors: Daniel DIAS DA COSTA , Damith MOHOTTI

Thesis abstract:

Safeguarding people as well as structures from extreme events is a major concern for the modern day designer. In fact, this is a major area of concern for the Australian Government as well as most countries in the world. The traditional approach of accounting for the dead, live and wind loads have expanded into other loads such as earthquake, snow etc. However, in recent years, due to the growing concerns regarding the threat of terrorism as well as recorded incidents related to accidental explosions (Ex: Gas explosions), the designers have begun to add provisions for blast loads. The unpredictable nature of such occurrences, as well as the complex nature of a blast phenomenon, makes it extremely hard to prevent or even quantify the damage it could cause to structures. Therefore, the focus is on minimizing the damage on structures using reasonable predictions and assumptions.

Blast loads generated shock waves which contain a high level of energy and propagates at high velocities. Therefore, its interaction with structures could cause damages with a wide range of severities. Therefore, an important aspect of protecting structures is through shock mitigation. To this end, multi-material systems are preferred over monolithic systems, but current such systems show major drawbacks such as interfacial delamination and tensile failures at free surfaces. This research goes beyond a traditional multi-material system and is geared towards providing a novel solution to shock wave mitigation.

Note: This profile is for a student at the University of Sydney. Views presented here are not necessarily those of the University.