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Review from LAB #3
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Grain-scale shear sense
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Homework examples delta-type
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Homework examples S-C Mylonite
when you know the schistose foliation and shear bands formed at the same time than S-C mylonite. Develop best in a micaceous granite protolith S
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Homework examples sigma-type
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The Traction Vector and Stress Tensor
LAB #4 The Traction Vector and Stress Tensor
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From Force to Stress Traction Force Stress at a Point Surface Stress
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The Stress Tensor “on in”
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Sign Convention Positive Shear Stress Negative Shear Stress
Determined by direction of traction acting on negative coordinate face Negative Shear Stress Tractions are positive in negative coordinate direction
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Principle Stresses
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Stresses in Principal Stress Frame
angle is between normal to plane and maximum principal stress orientation
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The Mohr Circle a way to visualize the relationship between shear and normal stresses
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