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Prologue

Prologue. This PowerPoint will be proceeded by a derivation of important Mohr Circle equations. Note this t xy turns the element CCW, plot x below the s axis. Recall this t xy turns the element CCW, plot x below the s axis. Worked Example 2. s p 1 = C + R. Yellow angle has tangent

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Prologue

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  1. Prologue • This PowerPoint will be proceeded by a derivation of important Mohr Circle equations.

  2. Note this txy turns the element CCW, plot x below the s axis

  3. Recall this txy turns the element CCW, plot x below the s axis

  4. Worked Example 2

  5. sp1 = C + R

  6. Yellow angle has tangent 20/50, yellow angle = 21.8o

  7. 180 - 21.8o = 158.2o

  8. An example from New Zealand • In New Zealand the shear stress t sign convention is reversed from the one we are currently using. Doesn’t matter, circles are symmetrical. • Notice the strong graphical use, relying on a scale (ruler) for graphing and measurements. http://www.youtube.com/watch?v=SQ7UYPN1Yrg Video by Steve Tomsett at CPIT

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