Same problem is considered here again using three equal length elements. Suppose that the Young's modules is E=19GPa, and the applied force is P=35KN. Find the strain energy of element 1 in N.m if the element area of this element is A₁-30 mm². (Hint: round your answer to 4 digits after decimal point).

If the displacements applied to a 3D isotropic material element is defined as functions of (x,y,z), Determine the following: 1- Stress at point (2,3,4). Assume E = 12.08 MPa and v = 0.25 2- Strain at point (1,2,2) 3- If you consider a plane stress condition for the above problems show how will the 2D assumption change the stress at the same point

Q3

Q#7: The strains measured with a 60⁰ strain rosette are ϵa = R/3 x 10^-6 , ϵb= - R/2 x 10^-6 , and ϵc = R/8 x 10^-6 . Using E = 200 GPa and µ = 0.3, find the principal stresses and their directions. Show  the results on a sketch of a properly oriented element. Use  R=980 Note : For Clearance of Question Please Refer to Attached Picture.