Electrical potential techniques for damage sensing in composite structures

摘要: Aircraft structures made of Carbon Fiber Reinforced Composites (CFRP) are susceptible to impact damage in service. If the is sufficient size, strength and service durability structure degraded. The size location only predictable a statistical sense; leading excessive conservatism design strains. Statistical approaches (1) have been explored, but condition monitoring increasingly seen as way forward. Smart materials an attractive route monitoring, past ten years there has considerable work develop optic fiber strain sensing techniques for composites, together with similar on compliance change, acoustic emission injection (2). All these involve use discrete sensors, manufactured integral composite laminate. Many difficulties associated sensors may be overcome by adoption which rely changes physical properties consequence damage. A prime candidate electrical resistance technique. This relies resistance, or potential distributions laminate characterize state.© (1994) COPYRIGHT SPIE--The International Society Optical Engineering. Downloading abstract permitted personal only.