Evaluation of Impact Mitigation and Health Monitoring Tradeoffs in Composite Missile Casing Design Using Iterative Inversion Loads and Damage Identification Methods

摘要

Sensing, modeling, and data analysis techniques for health monitoring of composite missile casings (carbon filament wound and S2 glass filament wound) have been developed. Here, the term 'health monitoring' is used to refer to both loads identification and damage identification for the purpose of assessing the material state and structural performance of a missile casing pressure vessel. Impact loads were located and quantified using a single sensor without a detailed model of the casing through a combination of iterative least- squares calculations and cubic-spline interpolations based on a modal decomposition of the dynamic response. Damage was detected using only passive response measurements by analyzing the time-varying nature of the casing during a damaging impact. Damage has also been detected despite changes in test conditions based on nonlinear identification of modulation. The techniques have been transferred to AMRDEC and ARL in addition to the USMC an industry.