ON ELASTIC STRESS WAVES IN AN IMPACTED PLATE

2014 ◽  
Vol 06 (04) ◽  
pp. 1450047 ◽  
Author(s):  
ZHANFANG LIU ◽  
XIAOYONG SUN ◽  
YUAN GUO
Keyword(s):  
Wave Motion ◽  
Elastic Stress ◽  
Wave Theory ◽  
Stress Waves ◽  
Ceramic Plate ◽  
Elastic Solids ◽  
Plate Impact ◽  
Impact Surface ◽  
Macro Scale ◽  
Elastic Stress Wave

Elastic stress wave theory is developed and the stress waves in the impacted plate are examined in the paper. Generalized linear elasticity is adopted where the couple stress and curvature tensor are both deviatoric tensors and they meet a linear constitutive relation. It is found that there exist volumetric, rotational, and deviatoric waves in the generalized elastic solids. However, for macro-scale elastic solids only two wave modes, namely a volumetric wave and a deviatoric wave should be taken into account. Wave motion in plate impact tests is studied that a volumetric wave and a deviatoric wave are proposed. A set of exact solutions is attained for elastic stress waves in an impact plate. Excitation of stress waves at impact surface and reflection at free surface are formulated. Propagation of stress waves in the plate is analyzed in the waveforms. The predicted stress history in a ceramic plate under impact is agreed very well with the experiment measurement.

Optimum Design of Layered Elastic Stress Wave Attenuators

1967 ◽  
Vol 34 (3) ◽  
pp. 751-755 ◽  
Author(s):  
L. E. Anfinsen
Keyword(s):  
Stress Wave ◽  
Elastic Stress ◽  
Stress Amplitude ◽  
Stress Waves ◽  
Wave Form ◽  
One Dimensional ◽  
In Series ◽  
Optimal Material ◽  
Subsequent Propagation ◽  
Elastic Stress Wave

The problem of maximizing or minimizing the amplitude of stress waves propagating through a one-dimensional elastic layered structure is investigated. The properties of layers in series, situated between free and fixed surfaces, are used in deriving difference equations that relate the applied stress wave form at the free surface to the transmitted stress wave form at the fixed surface along characteristic paths. Optimal material requirements are determined for the first transmitted stress wave, which strongly influences the subsequent propagation. Similarity parameters are derived by transform methods which provide optimization criteria for the two-layer case. Materials are systematically selected that can provide stress amplitude reductions of more than 99 percent.

The propagation of elastic stress waves in a conical shell under axial impulsive loading

1987 ◽  
Vol 3 (2) ◽  
pp. 173-186 ◽  
Author(s):  
Chen Yuze ◽  
Le Guopei ◽  
Jing Erli ◽  
Xue Jindi
Keyword(s):  
Conical Shell ◽  
Elastic Stress ◽  
Impulsive Loading ◽  
Stress Waves

Application of Study on Liquid Ablation in Laser Propulsion

2014 ◽  
Vol 644-650 ◽  
pp. 4918-4921
Author(s):  
Cun Yan Cui
Keyword(s):  
Stress Wave ◽  
Physical Mechanism ◽  
Elastic Stress ◽  
Research Result ◽  
Liquid Propellant ◽  
Perceptual Knowledge ◽  
Laser Propulsion ◽  
Elastic Stress Wave

It was found that evaporation and thermal elastic stress wave and cavity were dominant phenomenon in laser-induced ablation propulsion with liquid propellant according to our perceptual knowledge established in relative experiment and by analysis of physical mechanism of laser-induced ablation of liquid. The research result of the above phenomenon was introduced in this paper in order to give some elicitations to the researchers who were interested in the mechanism of laser propulsion with liquid ablation.

Wave Motion in Elastic Solids

1976 ◽  
Vol 27 (1) ◽  
pp. 30-30
Author(s):  
H G Hopkins
Keyword(s):  
Wave Motion ◽  
Elastic Solids

Wave motion in elastic solids

Ultrasonics ◽  
1975 ◽  
Vol 13 (5) ◽  
pp. 235-236
Author(s):  
D.P. Morgan
Keyword(s):  
Wave Motion ◽  
Elastic Solids

scholarly journals Road Pavement Stiffness Determination using SASW Method

2012 ◽  
Vol 3 ◽  
pp. 9-16 ◽  
Author(s):  
M. A. Ismail ◽  
A. R. Samsudin ◽  
A. G. Rafek ◽  
K. A. M. Nayan
Keyword(s):  
Rayleigh Wave ◽  
Wave Motion ◽  
Stress Waves ◽  
Velocity Versus ◽  
Road Pavement ◽  
Iterative Inversion ◽  
Shear Wave Velocity Profile ◽  
Pavement Construction

 The Spectral Analysis of Surface Waves (SASW) method is an in-situ seismic technique for the evaluation and assessment of road pavement. The method is based on the theory of stress waves propagating in elastic media with the key elements being the generation and detection of Rayleigh wave motion. A set of transient impact source with a range of frequencies is used to generate the Rayleigh wave energy that is able to propagate along the surface layer of the pavement. Through two vertical accelerometers, the motion of the wave for each range of frequency is recorded and calculated using a dynamic signal analyzer. A dispersion curve is then constructed from the cross-power spectrum of the Fast Fourier Transform (FFT) that results in the phase velocity versus wavelength plot. An iterative inversion is then carried out to obtain the shear wave velocity profile with depth and the corresponding dynamic modulus of each pavement units. This paper presents a case study carried out on a new road pavement construction site. It was found that the profile of the dynamic shear and Young’s modulus versus depth obtained from SASW method

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