Digital image correlation applied to shock loading of structural materials

Shock loading of structural materials is an important design consideration in many civil and military engineering applications. Integrating digital image correlation with high-speed photography has allowed for detailed analysis of high-rate events. This technique has been applied to laminated glass and glass fibre sandwich composite panels loaded by an air blast. A speckle pattern was applied to each panel of approximately 1.8m$^{2}$ and these were photographed at 1,000 frames per second using two high-speed cameras. The analysis has allowed for the measurement of full-field displacements in all three-dimensions and in-plane strains, aiding the verification of material models as well as giving an improved understanding of the failure mechanisms under blast loading.