Review from LAB #3
Grain-scale shear sense
Homework examples delta-type
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
Homework examples sigma-type
The Traction Vector and Stress Tensor LAB #4 The Traction Vector and Stress Tensor
From Force to Stress Traction Force Stress at a Point Surface Stress
The Stress Tensor “on in”
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
Principle Stresses
Stresses in Principal Stress Frame angle is between normal to plane and maximum principal stress orientation
The Mohr Circle a way to visualize the relationship between shear and normal stresses