This is quite some time ago, but did you solve your problem, and if, how? I don't know your geometry, but maybe you use a named selection in the geometry. You would still have to manually select it, but it might make it a bit easier. Tags ansys mechanical , fluid solid interfaces , geometry ansys Thread Tools.
Condensed Matter > Materials Science
BB code is On. Smilies are On. Trackbacks are On. Pingbacks are On. Refbacks are On. Forum Rules. All times are GMT The time now is Add Thread to del. Recent Entries. The same effect can be seen in the case of displacement seismograms.
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It is relevant to note that for the x 3 direction displacement amplitudes are larger than those for the x 1 direction. This can also be seen in Figures 2a and b middle and bottom.
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Figure 3 displays results in time domain for the materials shown in Table 1. Strick and Ginzbarg, ; Strick et al, The location of the receiver is illustrated in Figure 1a , for all the cases. Synthetic seismograms in this figure were placed considering the shear wave velocity of each material. In this figure, pressures registered by the receiver for each material are plotted. The pressure waves diffracted by rigid interfaces as Granite and Steel show higher values, while, those diffracted by less rigid interfaces, like Sandstone and Pitch, show lower values.
Additionally, for these last two cases, the wave fronts tend to be less noticeable.
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Arrivals of P and Scholte's wave fronts are indicated using dashed-dot lines. For comparative purposes, Scholte's wave front obtained by Strick and Ginzbarg, and Strick et al. This is represented with stars in the figure, good agreement between the results is observed. It is clear that the Scholte's wave is evident from the Limestone and manifests a significant delay for the Pitch.
Scholte waves on fluid-solid interfaces by means of an integral formulation
Finally, a sinusoidal interface is considered. Figure 4a shows the model used to deal with this geometry. The source time function is a Ricker wavelet with a dominant frequency of 10 Hz. The source and receiver locations are depicted in Figure 4a. Synthetic seismograms are shown in Figure 4b and c for vertical and horizontal displacements, respectively. The agreement between both methods is good. Here, the direct wave is clearly observed since the source point and the receiver are very close to each other. Moreover, multiple reflections are presented because of the interactions between the direct wave and the sinusoidal interface, as expected; this effect is clearly seen in Figure 4b and c.
The possibility of modeling arbitrary interface shapes is one of the main advantages of the IBEM. Additionally, another advantage of this method relies on the use of Green's functions for unbounded space, which have a simple form and can be easily programmed. The use of these functions has provided accurate numerical results.
In this paper we extended the use of the Indirect Boundary Element Method to study the propagation of elastic waves in fluid-solid interfaces.
In this numerical technique, based on the Huygens' principle and the Somigliana's representation theorem, the fields of pressures and displacements are expressed in terms of single layer boundary integral equations. Full space Green's functions for tractions and displacements are used, but they are forced to meet the proper boundary conditions that prevail at the fluid-solid interfaces.
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A wide range of solid materials characterized by their wave velocities and densities was analyzed. In every case, the presence and propagation of Scholte's waves is noticed, highlighting the important amount of energy that they carry. Therefore, we conclude that there is a good agreement between the different approaches studied. Avila-Carrera R. Biot M. Borejko P. Bouchon M. Carcione J. Geophysics 69, Geofisica Internacional 44, Eriksson A. Wave Motion 22, Ewing W. Godinho, L. Engineering Analysis with Boundary Elements J.
Gurevich B. International Journal of Solids and Structures 43, Komatitsch D. Geophysics 65, Mayes M. Meegan G. Il'inskii A. Nayfeh A.
Rayleigh J. London Math. Geofisica Internacional 46, Sign In. Access provided by: anon Sign Out. Breakdown strength of solid solid interface Abstract: Interfaces between solids are generally considered weak regions in electrical insulation systems. This is particularly so if the electrical stress is applied parallel to the interface.
Important parameters, affecting the breakdown strength, are interface pressure, humidity, presence of liquid dielectric and the surface roughness of the solid in contact. The main aim of the work presented here is to examine, theoretically and experimentally, the effect of interfacial pressure and roughness on the tangential breakdown strength.