Yield surface approximation for lower and upper bound yield design of 3D composite frame structures
Yield surfaces of composite beam sections are numerically computed. Computed yield surfaces are approximated by a Minkowski sum of ellipsoids. Static and kinematic approaches are formulated using finite elements and SOCP. Limit loads estimates on a complex frame structure are obtained within seconds.
yield surface approximation yield design composite frames limit analysis second-order cone programming finite element method