The arm of a crane has two steel plates connected with a rivet that transfers the force in pure shear. the rivet is made of annealed aisi 1040 steel and has a circular cross section with a diameter of 25 mm. the load on the rivet is 15 kn. calculate the safety factor according to the von mises criterion.

In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?