Thermoviscoelastic finite element modeling of laser-generated ultrasound in viscoelastic plates

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3520675· OSTI ID:21537976

Hongxiang, Sun ^[1]; Shuyi, Zhang ^[1]

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1. Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093 (China)

Laser-generated ultrasound in a thin composite plate with thermoviscoelastic property has been studied quantitatively. According to thermoviscoelastic theory, considering the viscoelastic and thermophysical properties of materials, a numerical model for the laser-generated Lamb waves is established in the frequency domain by using a finite element method. It is confirmed that the temperature and displacement fields calculated in the frequency domain coincide well with those obtained in the time domain. In the numerical simulations of thermoviscoelastically generated Lamb waves, the effects of viscoelastic and elastic stiffness moduli, and the thickness of the materials have been taken into account in details. The characteristics of the Lamb waves in the numerical results agree well with the features of the disperse curves. The results show that the finite element method in this paper provides a useful technique to characterize mechanical properties of composite materials.

• OSTI ID: 21537976
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 12; Other Information: DOI: 10.1063/1.3520675; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
COMPOSITE MATERIALS
COMPUTERIZED SIMULATION
COPPER
ELASTICITY
FINITE ELEMENT METHOD
FLEXIBILITY
FLUORESCENCE SPECTROSCOPY
HEAVY METALS
INDICATORS
IRON
MANGANESE
MUSCLES
THICKNESS
THIN FILMS
TRACE AMOUNTS
ULTRASONIC WAVES
VISCOSITY
X RADIATION
CALCULATION METHODS
DIMENSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTROSCOPY
FILMS
IONIZING RADIATIONS
MATERIALS
MATHEMATICAL SOLUTIONS
MECHANICAL PROPERTIES
METALS
NUMERICAL SOLUTION
RADIATIONS
SIMULATION
SOUND WAVES
SPECTROSCOPY
TENSILE PROPERTIES
TRANSITION ELEMENTS