A hybrid non-reflective boundary technique for efficient simulation of guided waves using local interaction simulation approach

2016 ◽  
Author(s):  
Hui Zhang ◽  
Carlos E. S. Cesnik
Keyword(s):  
Guided Waves ◽  
Local Interaction ◽  
Simulation Approach ◽  
Efficient Simulation ◽  
Interaction Simulation

Accuracy and Convergence Using a Local Interaction Simulation Approach in One, Two, and Three Dimensions

2009 ◽  
Vol 76 (3) ◽  
Author(s):  
Shankar Sundararaman ◽  
Douglas E. Adams
Keyword(s):  
Guided Waves ◽  
Wave Dispersion ◽  
Guided Wave ◽  
Local Interaction ◽  
Three Dimensions ◽  
Simulation Approach ◽  
Sharp Interface Model ◽  
Transform Method ◽  
Broadband Pulse ◽  
Interaction Simulation

Guided waves are utilized in structural health monitoring for identifying damage in material components. Simulations can be used to examine how elastic waves propagate in components to help in selecting measurement and data analysis techniques. In this work, the influence of grid size and the frequency sample rate on the amplitude accuracy and convergence of local interaction simulation approach/sharp interface model (LISA/SIM) numerical simulations are studied as they pertain to guided wave propagation in structural materials. These issues are studied in all three dimensions, and amplitude distortion with respect to the Courant–Friedrich–Lewy criterion is explored. The LISA/SIM enables accurate and fast modeling of localized and sharp changes in material properties across interfaces associated with heterogeneities and/ or boundaries. The validity of the simulation is demonstrated by comparing simulated responses with experimentally measured data. Additionally, Lamb wave dispersion curves are extracted through the course of the convergence study using a broadband pulse and the two-dimensional fast Fourier transform method.

Local Interaction Simulation Approach vs. Finite Element Modelling for Fault Detection in Medical Ultrasonic Transducer

2013 ◽  
Vol 588 ◽  
pp. 157-165 ◽  
Author(s):  
Z. Hashemiyan ◽  
Pawel Packo ◽  
W. Kochański ◽  
Wieslaw Jerzy Staszewski ◽  
Tadeusz Uhl ◽  
...  
Keyword(s):  
Fault Detection ◽  
Finite Element Modelling ◽  
Ultrasonic Transducer ◽  
Poor Quality ◽  
Local Interaction ◽  
Ultrasonic Transducers ◽  
Medical Applications ◽  
Simulation Approach ◽  
Element Modelling ◽  
Interaction Simulation

Ultrasonic transducers are extensively used in medical applications. Any deterioration in their performance can lead to poor quality images. The Local Interaction Simulation Approach (LISA) and Finite Elements are used to model medical ultrasonic transducers. The entire analysis attempts to find out whether the LISA-based methodology could be used for transducer modelling in fault detection applications based on in-air reverberation patterns.

Local interaction simulation approach to modelling nonclassical, nonlinear elastic behavior in solids

2003 ◽  
Vol 113 (6) ◽  
pp. 3049 ◽  
Author(s):  
Marco Scalerandi ◽  
Valentina Agostini ◽  
Pier Paolo Delsanto ◽  
Koen Van Den Abeele ◽  
Paul A. Johnson
Keyword(s):  
Local Interaction ◽  
Elastic Behavior ◽  
Simulation Approach ◽  
Interaction Simulation ◽  
Nonlinear Elastic

scholarly journals Hybrid Global Matrix/Local Interaction Simulation Approach for Wave Propagation in Composites

AIAA Journal ◽  
2015 ◽  
Vol 53 (2) ◽  
pp. 379-393 ◽  
Author(s):  
Matthew B. Obenchain ◽  
Kalyan S. Nadella ◽  
Carlos E. S. Cesnik
Keyword(s):  
Wave Propagation ◽  
Local Interaction ◽  
Simulation Approach ◽  
Interaction Simulation
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