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Rosette Data Reduction

A calculator for
Principal Strains
With strain measurements made with a rectangular rosette on a homogeneous material.

Independent Variables
Measured Strains (microstrain), , ,

Dependent Variable
Principal Strains (microstrain),  
Direction * (degrees),

Note
* Direction from Grid 1 to the maximum principal strain axis:
if = and < , then = = -45 degrees.
if = and > , then = = +45 degrees.
if = = , then is indeterminate (equal biaxial strain).

Calculator

Measured Strains

Grid 1:

Grid 2:

Grid 3:

Principal Strains

Maximum:

Minimum:

Direction:

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