Autonomous sensing of composites with carbon nanotubes for structural health monitoring

Yingtao Liu; Masoud Yekani Fard; Abhishek Rajadas; Aditi Chattopadhyay

doi:10.1117/12.915467

28 March 2012 Autonomous sensing of composites with carbon nanotubes for structural health monitoring

Yingtao Liu, Masoud Yekani Fard, Abhishek Rajadas, Aditi Chattopadhyay

Proceedings Volume 8342, Behavior and Mechanics of Multifunctional Materials and Composites 2012; 83421H (2012) https://doi.org/10.1117/12.915467
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2012, San Diego, California, United States

Abstract

The development of structural health monitoring techniques leads to the integration of sensing capability within engineering structures. This study investigates the application of multi walled carbon nanotubes in polymer matrix composites for autonomous damage detection through changes in electrical resistance. The autonomous sensing capabilities of fiber reinforced nanocomposites are studied under multiple loading conditions including tension loads. Single-lap joints with different joint lengths are tested. Acoustic emission sensing is used to validate the matrix crack propagation. A digital image correlation system is used to measure the shear strain field of the joint area. The joints with 1.5 inch length have better autonomous sensing capabilities than those with 0.5 inch length. The autonomous sensing capabilities of nanocomposites are found to be sensitive to crack propagation and can revolutionize the research on composite structural health management in the near future.

Citation Download Citation

Yingtao Liu, Masoud Yekani Fard, Abhishek Rajadas, and Aditi Chattopadhyay "Autonomous sensing of composites with carbon nanotubes for structural health monitoring", Proc. SPIE 8342, Behavior and Mechanics of Multifunctional Materials and Composites 2012, 83421H (28 March 2012); https://doi.org/10.1117/12.915467

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