If the two principal strains at a point are 1000 x 10-6

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If the two principal strains at a point are 1000 x 10^-6 and –600 × 10^-6, then the maximum shear strain is

1. 800 × 10^-6
2. 500 × 10^-6
3. 1600 × 10^-6
4. 200 × 10^-6

Correct Option: C

τ_max =	φ_max	,radius	∊₁ - ∊₂
	2		2

φ_max = ∊₁ = ∊₂
= 1000 × 10_–6 - (-600 × 10_–6)
φ_max = 1600 × 10_–6