Elastic wave surfaces and phonon focussing for the A-15 compounds

1981 ◽  
Vol 38 (10) ◽  
pp. 947-948
Author(s):  
K.S. Viswanathan
Keyword(s):  
Elastic Wave ◽  
Wave Surfaces ◽  
Phonon Focussing

Elastic-wave surfaces in solids

1982 ◽  
Vol 114 (2) ◽  
pp. 475-480 ◽  
Author(s):  
H. M. Ledbetter ◽  
R. D. Kriz
Keyword(s):  
Elastic Wave ◽  
Wave Surfaces

Cuspidal edges for elastic wave surfaces for cubic crystals

Pramana ◽  
1977 ◽  
Vol 8 (4) ◽  
pp. 348-362 ◽  
Author(s):  
Jacob Philip ◽  
K S Viswanathan
Keyword(s):  
Elastic Wave ◽  
Cubic Crystals ◽  
Wave Surfaces

Elastic wave surfaces for the (111) plane of cubic crystals

Pramana ◽  
1981 ◽  
Vol 17 (2) ◽  
pp. 135-142
Author(s):  
V Narasimha Iyer ◽  
K S Viswanathan
Keyword(s):  
Elastic Wave ◽  
Cubic Crystals ◽  
Wave Surfaces

Elastic Wave Surfaces in Heterogeneous Anisotropic Plates

AIAA Journal ◽  
1973 ◽  
Vol 11 (11) ◽  
pp. 1571-1573 ◽  
Author(s):  
A. S. D. WANG ◽  
D. L. TUCKMANTEL
Keyword(s):  
Elastic Wave ◽  
Anisotropic Plates ◽  
Wave Surfaces

On whether elastic wave surfaces possess cuspidal edges

1957 ◽  
Vol 53 (4) ◽  
pp. 897-906 ◽  
Author(s):  
M. J. P. Musgrave
Keyword(s):  
Elastic Wave ◽  
Elastic Constants ◽  
Reciprocal Relation ◽  
Sufficient Condition ◽  
Hexagonal Symmetry ◽  
Conical Refraction ◽  
Continuous Sheet ◽  
Cusp Points ◽  
Wave Surfaces ◽  
In Virtue Of

ABSTRACTConsideration of the direction of the normal at any point on a continuous sheet of a surface yields a sufficient condition for the existence of parabolic points on that sheet. This condition has been used to derive some simple inequalities between elastic constants, whose fulfilment determines the existence of parabolic points upon the inverse surfaces of media of orthorhombic, tetragonal, cubic or hexagonal symmetry; in virtue of the polar reciprocal relation between inverse and wave surfaces, the existence of cusp points on the latter is thereby simultaneously established. It is also pointed out that conditions for external conical refraction may prevail in hexagonal media.

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