APPLICATIONS OF HOLOGRAPHIC-INTERFEROMETRY FOR SPACECRAFT STRUCTURAL COMPONENTS

An overview of the applications of holographic interferometry for spac ecraft structural components at ISRO Satellite Centre, Bangalore, Indi a, is presented. The details of the development of a dual vacuum stres sing technique and its application for holographic nondestructive test ing (HNDT) of honeycomb panels are presented. Results of some calibrat ion studies conducted for HNDT of propellant tanks are also presented. It is found that holographic interferometry is quite useful, particul arly for HNDT of honeycomb panels and propellant tanks used for spacec raft structural components.