Solid structures carry three main wave types plus hybrid surface waves

Evidence

There are three main types of wave in these structures: quasi-longitudinal, transverse shear and bending (flexural)—the latter two are shown in Figures 1.3 and 1.4. There are others, for example surface acoustic waves, like waves at sea and waves in earthquakes, that are combinations of longitudinal and transverse waves. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 105

Categorization

• DEFINE: Names and distinguishes the three main wave categories in solid bars, plates, and similar structures.
• corroborated: 3 independent passages support this claim — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 105
• XREF: connects to: Materials with movable boundaries support wave types beyond longitudinal waves.; Applied forces in plates generate bending waves rather than pure shear waves — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 121; Longitudinal and shear waves preserve waveshape because phase velocity is frequency-independent — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 132

Broader Connections

• Longitudinal and shear waves preserve waveshape because phase velocity is frequency-independent #expands (0.80) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 132
• Applied forces in plates generate bending waves rather than pure shear waves #expands (0.75) — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 121