Materials Science and Engineering/Doctoral review questions/Crystallography
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Tensor 1[edit | edit source]
Propagation of Waves Along One-Dimensional Crystal with Two Kinds of Atoms[edit | edit source]
- Force-balance equations
- Trial solution
- With a given value of k, there are two different waves of angular frequency that may be propagated
Interpretation of the Solutions[edit | edit source]
Solutions of Small k[edit | edit source]
Solutions with positive sign at k = 0[edit | edit source]
Solutions with negative sign at k = 0[edit | edit source]
Acoustic and optic branch
Solutions with k = kmax[edit | edit source]
Displacements at kmx[edit | edit source]
Correspondence to the Identical-Atom Problem[edit | edit source]
The optical mode is not present in the case with one kind of atom.
Tensor 2[edit | edit source]
Wave Propagation in a Continuous One-Dimensional Medium[edit | edit source]
The wave velocity is independent of
Wave Motion on a Row of Identical Atoms[edit | edit source]
Total Number of Vibrational Modes that May be Supported by the Crystal[edit | edit source]
The number of vibration modes that can be supported is equal to the number of atoms in the crystal
Tensor 3[edit | edit source]
Propagation of Elastic Waves in Crystals[edit | edit source]
Relation of stress and strain in a cubic crystal
Tensor 4[edit | edit source]
Tensor 5[edit | edit source]
Conventions of Relabeling Stress, Strain, Stiffness, and Compliance in Matrix Notation[edit | edit source]
Condensation of Tensor to Matrix Notation[edit | edit source]
Strain in Terms of Stress[edit | edit source]
Stress in Terms of Strain[edit | edit source]
Tensor 6[edit | edit source]
Property Tensors[edit | edit source]
Triclinic[edit | edit source]
Monoclinic[edit | edit source]
Orthorhombic[edit | edit source]
Tetragonal[edit | edit source]
Tetragonal[edit | edit source]
Cubic[edit | edit source]
Isotropic[edit | edit source]
Cauchy Relation[edit | edit source]
- Central Forces
- Each atom at center of symmetry
- No initial stress