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Stress and Shear Sense in Geology

Explore grain-scale shear sense with homework examples and stress tensor concepts in geology labs. Learn about positive and negative shear stresses, principal stresses, Mohr circle, and stress sign conventions.

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Stress and Shear Sense in Geology

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  1. Review from LAB #3

  2. Grain-scale shear sense

  3. Homework examplesdelta-type

  4. Homework examplesS-C Mylonite C S

  5. Homework examplessigma-type

  6. LAB #4 The Traction Vector and Stress Tensor

  7. From Force to Stress Traction Force Stress at a Point Surface Stress

  8. The Stress Tensor

  9. Sign Convention Positive Shear Stress Determined by direction of traction acting on negative coordinate face Negative Shear Stress Tractions are positive in negative coordinate direction

  10. Principle Stresses

  11. Stresses in Principal Stress Frame

  12. The Mohr Circle

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