GATE CE 2017 Set 2 — Question 16
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Structural Engineering → Stress, Strain & Beams → Simple Stress & Strain
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Question
In a material under a state of plane strain, a mm square centered at a point gets deformed as shown in the figure.
If the shear strain at this point is expressed as (in rad), the value of is

- A.0.50
- B.0.25
- C.-0.25
- D.-0.50
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Correct answer
(A;D)
Solution
Shear strain is defined as the change in the angle between two initially perpendicular lines (the and axes). From the figure, the final angle between the axes is rad.
The shear strain is calculated as:Given that , we equate the values:Note: Due to potential ambiguities in the figure's labeling (specifically the mm displacement), the official GATE answer key accepted both options (A) and (D).
The shear strain is calculated as:Given that , we equate the values:Note: Due to potential ambiguities in the figure's labeling (specifically the mm displacement), the official GATE answer key accepted both options (A) and (D).
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