Study of ballistite material mechanical behaviors using temporal speckle pattern interferometry

Abstract The ballistite material is one kind of special composite material. Its mechanical behaviors highly affect the reliability and stability of the rocket operation. Because of its special properties of large deformations under loading and high particle composite in structures, it is difficult to quantitatively measure the ballistite deformations using the conventional speckle methods or the contact methods. Two methods, the Scanning Phase Method (SPM) and Time Sequence Phase Method (TSPM) in Temporal Speckle Pattern Interferometry (TSPI), have been applied to investigate the special mechanical behaviors of the ballistite material under mechanical, thermal, and mechanical–thermal loads, and the creep behaviors of the ballistite material under the loads are analyzed in this paper.