Self-sensing Adhesive for Monitoring Composite Bonded Joints

Project: Research project

Description

Statement of Work Adhesive bonded joints offer a number of advantages over bolted joints and are widely used in aerospace structures. However, inspection of debonding in the adhesive remains a critical concern. This project will address the development of a self-sensing mechanism to monitor the health of composite bonded joints. Nano fillers, such as single-walled and multi-walled carbon nanotubes (CNTs), integrated within the adhesive, will be used to improve the mechanical and electrical properties; the piezoresistive property will be exploited for in-situ monitoring of the structural integrity of the joint. Although preliminary work has been reported on the development of self-sensing capabilities in composite adhesive joints [1-3], several issues remain to be addressed. This project will address the following tasks. 1. Develop of self-sensing capabilities in composite adhesive joints using single-walled and multi-walled CNTs. 2. Investigate sensing performance under complex loading conditions, such as impact and fatigue. 3. Study the effects of local agglomeration on the self-sensing capability. 4. Validate the use of CNT integrated self-sensing epoxy in complex joints (such as stiffened structures). References 1. Liu, Y., Rajadas, A., and Chattopadhyay, A., A biomimetic structural health monitoring approach using carbon nanotubes, JoM: The Member Journal of TMS, Vol. 64, No. 7, pp. 802-807, 2012. 2. Gibson, R.F., A review of recent research on mechanics of multifunctional composite materials and structures, Composite Structures, Vol. 92, pp. 2793-2810, 2010. 3. Thostenson, E.T., Chou, T.W., Carbon nanotube networks: sensing of distributed strain and damage for life prediction and self healing, Advanced Materials, Vol. 18, No. 21, pp. 28372841, 2006.
StatusFinished
Effective start/end date2/15/132/14/14

Funding

  • DOD-NAVY: Naval Air Systems Command (NAVAIR): $75,000.00

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Carbon nanotubes
Adhesive joints
Monitoring
Composite materials
Composite structures
Adhesives
Bolted joints
Structural health monitoring
Debonding
Biomimetics
Structural integrity
Fillers
Mechanics
Electric properties
Agglomeration
Inspection
Health
Fatigue of materials
Mechanical properties