For pure shear (σ_x = σ_y = 0, τ_xy = τ), principal stresses are:

Question

Accepted Answer

D. +τ and -τ

**Pure shear:** principal stresses ±τ on 45° planes.
**Mohr's circle:** centered at origin, radius τ.
Hence pure shear is equivalent to biaxial tension-compression on 45° planes.
*Important: pure shear test causes failure on diagonal lines.*

Answer

Zero

Answer

Just τ

Answer

Both +τ and -τ at 45°

For pure shear (σ_x = σ_y = 0, τ_xy = τ), principal stresses are:

Keep practising Strength of Materials