Journal Article10.1115/1.4037545
Local Interaction Simulation Approach for Efficient Modeling of Linear and Nonlinear Ultrasonic Guided Wave Active Sensing of Complex Structures
Yanfeng Shen,Carlos E. S. Cesnik +1 more
- 01 Feb 2018
- Vol. 1, Iss: 1, pp 011008
41
TL;DR: In this article, the local interaction simulation approach (LISA) is proposed for efficient modeling of linear and non-linear ultrasonic guided wave active sensing of complex structures in structural health monitoring (SHM).
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Abstract: This paper presents the local interaction simulation approach (LISA) for efficient modeling of linear and nonlinear ultrasonic guided wave active sensing of complex structures. Three major modeling challenges are considered: material anisotropy with damping effects, nonlinear interactions between guided waves and structural damage, as well as geometric complexity of waveguides. To demonstrate LISA’s prowess in addressing such challenges, carefully designed numerical case studies are presented. First, guided wave propagation and attenuation in carbon fiber composite panels are simulated. The numerical results are compared with experimental measurements obtained from scanning laser Doppler vibrometry (SLDV) to illustrate LISA’s capability in modeling damped wave propagation in anisotropic medium. Second, nonlinear interactions between guided waves and structural damage are modeled by integrating contact dynamics into the LISA formulations. Comparison with commercial finite element software reveals that LISA can accurately simulate nonlinear ultrasonics but with much higher efficiency. Finally, guided wave propagation in geometrically complex waveguides is studied. The numerical example of multimodal guided wave propagation in a rail track structure with a fatigue crack is presented, demonstrating LISA’s versatility to model complex waveguides and arbitrary damage profiles. This paper serves as a comprehensive, systematic showcase of LISA’s superb capability for efficient modeling of transient dynamic guided wave phenomena in structural health monitoring (SHM). [DOI: 10.1115/1.4037545]
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Nonlinear features of guided wave scattering from rivet hole nucleated fatigue cracks considering the rough contact surface condition
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TL;DR: In this article, a small-size numerical model based on the local interaction simulation approach is developed, enabling the efficient analysis of the contact acoustic nonlinearity during the wave crack interactions.
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A macro‐element strategy based upon spectral finite elements and mortar elements for transient wave propagation modeling. Application to ultrasonic testing of laminate composite materials
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Modeling of nonlinear interactions between guided waves and fatigue cracks using local interaction simulation approach.
Yanfeng Shen,Carlos E. S. Cesnik +1 more
TL;DR: A parallel algorithm to model the nonlinear dynamic interactions between ultrasonic guided waves and fatigue cracks and the explicit contact formulation, the parallel algorithm, as well as the GPU-based implementation facilitate LISA's high computational efficiency over the conventional finite element method (FEM).
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