On the surface of a certain component made of aluminium with amodulus of elasticity of 75 GPa and a Poisson’s ratio of 0.35, astrain gauge rosette measures the following strains 0 = –94 × 10-660 = 370 × 10-6 120 = 235 × 10-6 The aluminium has a yield strengthof 95 MPa. a) Determine the strain components x, y, and xy from thestrain gauge measurements. b) Determine values for x, y and xy fromthe strain components in part (a). c) Determine the magnitude ofthe principal stresses. d) What is factor of safety according tothe maximum distortion energy theory of failure? [20 marks] [40marks] [40 marks] [20 marks]
