ENGR 220 Section 10.1 10.3

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ENGR 220Section 10.1 - 10.3
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Plane Strain

• Review of Strain
• Deformation due to a stress is specified using
  the concept of normal and shear strain.

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Normal Strain

• Elongation or contraction of a line segment per
  unit of length.

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Shear Strain

• The change in angle the occurs between two line
  segments that were originally perpendicular.

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Volume and shape deformations
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Plane Strain
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Strain Gauges
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Strain Gauge
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Strain Rosette
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Generic Solution
Strain measured along three axes at angles ?a ?b
?c Transform along x-y coordinates Stain
Transformation Equations.
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Plane Strain
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Plane Strain Transformation
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Plane Strain Transformation Equations
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45 Strain Rosette
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60 Strain Rosette
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Principal Strains
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Maximum In-Plane Shear Strain
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Mohrs Circle
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Mohrs Circle
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Problem 10-2 Determine the in-plane strains of
an element orientated at ?20 counter-clockwise
from the original position.