scholarly journals Numerical modeling of wave propagation in anisotropic viscoelastic laminated materials in transient regime: Application to modeling ultrasonic testing of composite structures

2020 ◽  
Vol 121 (15) ◽  
pp. 3300-3338
Author(s):  
Alexandre Imperiale ◽  
Nicolas Leymarie ◽  
Edouard Demaldent
Keyword(s):  
Numerical Modeling ◽  
Wave Propagation ◽  
Ultrasonic Testing ◽  
Composite Structures ◽  
Transient Regime ◽  
Laminated Materials

scholarly journals Detection of Dynamic Modulus and Crack Properties of Asphalt Pavement Using a Non-Destructive Ultrasonic Wave Method

2019 ◽  
Vol 9 (15) ◽  
pp. 2946 ◽  
Author(s):  
Weiguang Zhang ◽  
Muhammad Arfan Akber ◽  
Shuguang Hou ◽  
Jiang Bian ◽  
Dong Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
Wave Propagation ◽  
Ultrasonic Wave ◽  
Asphalt Concrete ◽  
Ultrasonic Testing ◽  
Experimental Results ◽  
Dynamic Moduli ◽  
Ultrasonic Wave Propagation ◽  
Non Destructive

Non-destructive ultrasonic testing has attained popularity due to its robustness and cost-effectiveness in monitoring the structural health and performance evaluation of pavements, thus replacing traditional methods. This paper presents the application of an explicit finite element method for the modeling of ultrasonic wave propagation through asphalt concrete. Prior to modeling, non-destructive ultrasonic testing was conducted on four different types of asphalt concrete (AC-13, SMA-13, AC-20, and AM-20). Based on acoustic information (wave velocity) obtained in non-destructive testing (NDT) and density, the dynamic moduli of these asphalt concretes were evaluated and used in numerical modeling of ultrasonic wave propagation using the commercial software package ABAQUS. The ultrasonic wave results obtained by numerical modeling were compared with experimental results. This comparison showed a good fit between the finite element (FE) results and the experimental results and confirmed a good FE approach for ultrasonic wave propagation. In addition, the influence of varying dynamic moduli, density, varying location, and crack size/depth on ultrasonic wave propagation was analyzed.

A Model for Ultrasonic Testing Conical Transducer and Optimal Design

2011 ◽  
Vol 467-469 ◽  
pp. 800-805
Author(s):  
Chao Lu ◽  
Wei Xu
Keyword(s):  
Numerical Modeling ◽  
Wave Propagation ◽  
Optimal Design ◽  
Finite Difference Method ◽  
Ultrasonic Testing ◽  
Mechanical Energy ◽  
Ultrasonic Transducer ◽  
Electrical Energy ◽  
Angle Of Incidence ◽  
Line Contact

In this paper, a numerical modeling of contact conical transducers is discussed in conjunction with wave propagation analyses by a finite difference method (FDM). Although transducers are the devices to convert electrical energy into mechanical energy and vice versa, attention in this paper is paid mostly to the study of characteristics and parameters of cones and wedges influencing their performance. Cones and wedges inserted between an ultrasonic transducer and the specimen provide the transducer with enhanced capability for point or line contact with the specimen. We study the effect of the dimensions, shape and aperture on the frequency response and the angle of incidence of the wave. Through the testing transducer modeling, some conclusions have been drawn from the analysis, which is useful to as the guideline and criteria for an optimum conical wedge design.

scholarly journals Wave Propagation Analysis in Composite Laminates Containing a Delamination Using a Three-Dimensional Spectral Element Method

2012 ◽  
Vol 2012 ◽  
pp. 1-19 ◽  
Author(s):  
Fucai Li ◽  
Haikuo Peng ◽  
Xuewei Sun ◽  
Jinfu Wang ◽  
Guang Meng
Keyword(s):  
Wave Propagation ◽  
Lamb Wave ◽  
Composite Laminates ◽  
Composite Structures ◽  
Spectral Element Method ◽  
Three Dimensional ◽  
Spectral Element ◽  
Wave Mode ◽  
Diagonal Form ◽  
Element Method

A three-dimensional spectral element method (SEM) was developed for analysis of Lamb wave propagation in composite laminates containing a delamination. SEM is more efficient in simulating wave propagation in structures than conventional finite element method (FEM) because of its unique diagonal form of the mass matrix. Three types of composite laminates, namely, unidirectional-ply laminates, cross-ply laminates, and angle-ply laminates are modeled using three-dimensional spectral finite elements. Wave propagation characteristics in intact composite laminates are investigated, and the effectiveness of the method is validated by comparison of the simulation results with analytical solutions based on transfer matrix method. Different Lamb wave mode interactions with delamination are evaluated, and it is demonstrated that symmetric Lamb wave mode may be insensitive to delamination at certain interfaces of laminates while the antisymmetric mode is more suited for identification of delamination in composite structures.

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