44. nanomaterial-based sensing of distributed damage in engineered and biological systems
Name: Long Wang
Grad Year: 2019
The objective of this study was to propose an approach to sense distributed damage in both engineered (i.e., land, marine, and aerospace structures) and biological systems (i.e., human body). Here, carbon nanotubes (CNT)-based ink was developed for scalable fabrication of piezoresistive sensing thin film. By spraying the CNT-based ink directly onto different substrate materials, including concrete aggregates, laminated glass fiber reinforced composite, steel plates, and fabrics, the corresponding substrate materials will be effectively functionalized. In addition, by coupling the aforementioned nano-engineered conventional materials with an electrical impedance tomography algorithm, the damage/deformation-induced internal electrical conductivity change in the CNT sensing films can be accurately inspected and mapped. Consequently, the subsurface damage of self-sensing structural materials can be readily identified and located. Furthermore, by integrating this technique to the fabric sheets, the immobilized patient?s body position can be obtained based on the reconstructed conductivity map of the sensing films. With this information, various diseases (e.g., pressure ulcer) due to prolonged sitting or lying can be effectively avoided through timely shifting the patient?s body position.
Industry Application Area(s)
Aerospace, Defense, Security | Civil/Structural Engineering | Materials