Stress-driven two-phase integral elasticity for torsion of nano-beams
Barretta Raffaele, Faghidian S. Ali, Luciano Raimonso, Medaglia Carlo Maria, Penna Rosa - Size-dependent structural behavior of nano-beams under torsion is investigated by two-phase integral elasticity. An effective torsional model is proposed by convexly combining the purely nonlocal integral stress-driven relation with a local phase. Unlike Eringen's strain-driven mixture, the projected model does not exhibit singular behaviors and leads to well-posed elastostatic problems in all cases of technical interest.