Sections: 9.1 Plane-Stress Transformation + 9.2 General Equations of Plane-Stress Transformation + 9.3 Principal Stresses and Maximum In-Plane Shear Stress
Practice Problems: 9-7, 9-8, 9-16, 9-29
Textbook: Mechanics of Materials by R. C. Hibbeler - 10th Ed. (Global Edition)
Lecture notes are available here: https://sites.google.com/view/alahijazi/classes/mechanics-of-materials