Real-Time Magneto-Optic Nondestructive Inspection of Tagged Composite Materials

标记复合材料的实时磁光无损检测

• 批准号: 9460533
• 负责人: Gerald Fitzpatrick
• 金额: $ 7.5万
• 依托单位: Physical Research Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1996-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9460533&HistoricalAwards=false
• 关键词: Real; Time; Magneto; Optic; Nondestructive

This Small Business Innovation Research Phase I project will demonstrate a new, advanced, rapid nondestructive inspection technique for use on composite materials during manufacturing and in-service inspection. Composite materials are rapidly becoming strong, lightweight substitutes for a great variety of traditional metallic structural components. However, composites are often difficult to inspect for discontinuities or impact damage due to their high electrical resistivity and/or high ultrasonic attenuation. It is proposed that composites be tagged during manufacturing with trace quantities of magnetic powders in the binding matrix and/or with ferromagnetic or electrically conducting wire screens among the fiber layers - such screens are already commonly employed in existing aerospace composites for deicing heaters and lightning protection. It is further proposed that an electrically noncontacting magneto-optic/eddy current imaging system, the MOI, then be used to form rapidly scanned, real-time images of voids and impact damage deliberately introduced into these materials. With an appropriate choice of tagging materials, composite samples and controlled experiments involving the MOI and SQUID magnetometers, Physical Research, Inc., will demonstrate the feasibility of rapidly imaging and detecting otherwise hidden discontinuities and impact damage.

这个小型企业创新研究第一阶段项目将展示一种新的，先进的，快速的无损检测技术，用于制造和在役检测过程中的复合材料。复合材料正迅速成为各种传统金属结构部件的坚固、轻质替代品。然而，由于复合材料的高电阻率和/或高超声衰减，通常难以检查不连续性或冲击损伤。建议在制造过程中用粘结基质中的微量磁粉和/或纤维层之间的铁磁或导电金属丝屏蔽来标记复合材料-这种屏蔽已经普遍用于现有的航空航天复合材料中用于除冰加热器和雷电保护。它进一步建议，电非接触磁光/涡流成像系统，MOI，然后被用来形成快速扫描，实时图像的空隙和故意引入这些材料的冲击损伤。通过适当选择标记材料、复合样品和涉及MOI和SQUID磁力计的受控实验，Physical Research，Inc.，将证明快速成像和检测隐藏的不连续性和撞击损伤的可行性。