scholarly journals Finite-element analysis of the nonlinear propagation of high-intensity acoustic waves

1999 ◽  
Vol 106 (1) ◽  
pp. 91-101 ◽  
Author(s):  
C. Campos-Pozuelo ◽  
B. Dubus ◽  
J. A. Gallego-Juárez
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Acoustic Waves ◽  
High Intensity ◽  
Nonlinear Propagation ◽  
Element Analysis

Finite-Element Analysis of Periodic Waveguides for Acoustic Waves

1984 ◽  
Vol 23 (S1) ◽  
pp. 139 ◽  
Author(s):  
Masanori Koshiba ◽  
Seiichi Mitobe ◽  
Michio Suzuki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Acoustic Waves ◽  
Element Analysis

scholarly journals Inspection of the residual stress on welds using laser ultrasonic supported with finite element analysis

2019 ◽  
Vol 6 ◽  
pp. 3
Author(s):  
Chong Ye ◽  
I. Charles Ume ◽  
Yuanlai Zhou ◽  
Vishnu V.B. Reddy
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Rayleigh Wave ◽  
Acoustic Waves ◽  
Velocity Variation ◽  
Element Analysis ◽  
Stress Evaluation ◽  
Longitudinal Residual Stress ◽  
Velocity Variations

Ultrasonic evaluation for residual stress measurement has been an effective method owing to its easy implementation, low cost and intrinsically being nondestructive. The velocity variations of acoustic waves in materials can be related to the stress state in the deformed medium by the acoustoelastic effects. In this study, a laser/EMAT ultrasonic method is proposed to evaluate the surface/subsurface longitudinal residual stress distribution generated by gas metal arc welding (GMAW). The velocity variation ΔV/V of Rayleigh wave, which is a surface wave, will be experimentally measured. Q-Switched Nd:YAG laser is used to generate a broadband ultrasonic wave. An electromagnetic acoustic transducer (EMAT) is attached to the welding plate for Rayleigh wave pick up. As the ultrasound receiver, the EMAT is used to measure time of flight (ToF) of the Rayleigh waves traveling along a specific path parallel to the direction of the welding seam. ToF measurements are obtained by changing Rayleigh wave path to welding zone center distance from 0 to 45 mm. A 3D thermomechanical-coupled finite element model is then developed to validate the capability of the proposed technique for welding-induced residual stress evaluation. The distributions of the normalized velocity variations from ToF experiments are compared with the distribution of the normalized longitudinal residual stresses from finite element analysis (FEA). It has been shown that there is a good correlation between these two distributions. The proposed technique provides a potential nondestructive avenue for surface/subsurface residual stress evaluation for welding parts.

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