1. Experimental stress Analysis Introduction

2. Main Course Topics Review of Concepts Failure Theories Generalized Hook’s law – Elasticity Stress-Strain Response after Yield Cyclic Stress-Strain Behaviour Experimental Stress Analysis Strain gauges Photoelsaticity Stress Concentrations

3. Transformation of Stress The state of plane stress at a point p is shown on the element in the figure on the right. Determine the principal stresses and the maximum in-plane shear stress and show them acting on properly oriented elements. Also determine the absolute maximum shear stress.  x= 22MPa normal stress acting on the x face  y=10MPa normal stress acting on the y face  xy=6 MPa shear stress 22 6 0 6 10 0 0 0 0 MPa Stress p = p

4. Solution: radians

5. Principal Stresses

6. Alternatively:    

7. Maximum Shear Stress  s 22.5degrees 