Shear displacement is a right-angle force causing one material part to slip past another

Evidence

A shear displacement is what happens if you cut paper with scissors, or tear it. You are applying a force at right angles and making one part of the material slip, or shear, with respect to the other. — David Howard, Jamie Angus, coustics and Psychoacoustics, 96

Categorization

• DEFINE: An accessible everyday gloss making the shear concept concrete.
• corroborated: 2 independent passages support this claim — David Howard, Jamie Angus, coustics and Psychoacoustics, 96
• XREF: connects to: Mysterious ‘cookie cutter’ sod displacements result from triggered shallow fault slips; Shear waves resist deformation via stiffness rather than tension