Plot the variation of Q11 as a function of the angle θ between 0 and 90° , using the material properties of given Exercise. When does Q11‾ becomes numerically equal to Q22‾?
Exercise
Consider a plane defined in parametric form as
F(x,y,z)=(x/a)+(y/b)+(z/c)-1 = 0
where a, b, c are the intercepts on the x, y, z axes, and take a = 3, b = 4, c = 5. The stress tensor at that point, in contracted notation, is σ1 = 100, σ2 = 10, σ3 = -20, σ4 = 1, σ5 = 2, σ6 = -5. Compute the stress vector at x = y = z = 60/47 using Cauchy's law.