David Dillard, Virginia Tech (IMAGE) Virginia Tech Caption Over the last 25 years Virginia Tech Professor David Dillard developed a broad-based research program in order to gain an understanding of the inter-relationship between fracture mechanics and chemical characteristics of bonded systems. Credit Virginia Tech Photo Usage Restrictions Photo maybe be used with any report of Dr. Dillard's research. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.