A Spectral Element Approach for Modeling of Wave-Based Structural Health Monitoring Systems

Journal Article · Thu Sep 30 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3498204· OSTI ID:21428577

Schulte, Rolf T; Fritzen, Claus-Peter ^[1]

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1. Institute of Mechanics and Control-Mechatronics, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen (Germany)

During the last decades, guided waves have shown great potential for Structural Health Monitoring (SHM) applications. These waves can be excited and sensed by piezoelectric elements that can be permanently attached onto a structure offering online monitoring capability. As the setup of wave based SHM systems may be very difficult and time consuming there is a growing demand for efficient simulation tools providing the opportunity to design wave based SHM systems in a virtual environment. As usually high frequency waves are used, the associated short wavelength leads to the necessity of a very dense mesh, which makes conventional finite elements not well suited for this purpose. Therefore a flat shell spectral element approach is presented in this contribution. By including electromechanical coupling an SHM system can be simulated entirely from actuator voltage to sensor voltage. The focus of this contribution is the analysis of the effect of delaminations on propagating waves. A forward increment Lagrange multiplier method is used to simulate contact within the delaminated area. A model validation is performed using measured data of an anisotropic CFRP-plate.

• OSTI ID: 21428577
• Journal Information: AIP Conference Proceedings, Vol. 1281, Issue 1; Conference: ICNAAM 2010: International conference of numerical analysis and applied mathematics 2010, Rhodes (Greece), 19-25 Sep 2009; Other Information: DOI: 10.1063/1.3498204; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACTUATORS
ANISOTROPY
BUILDING MATERIALS
COMPUTERIZED SIMULATION
COUPLING
ELECTRIC POTENTIAL
MONITORING
NONDESTRUCTIVE TESTING
PIEZOELECTRICITY
PLATES
SENSORS
ULTRASONIC WAVES
VALIDATION
WAVE EQUATIONS
DIFFERENTIAL EQUATIONS
ELECTRICITY
EQUATIONS
MATERIALS
MATERIALS TESTING
PARTIAL DIFFERENTIAL EQUATIONS
SIMULATION
SOUND WAVES
TESTING