Ghorbanpour Arani, A.A, Niknejad, S, Abbasian Arani, A.A. Dynamic Response of Bi-Directional Functionally Graded Materials (BDFGMs) Beams Rested on Visco-Pasternak Foundation Under Periodic Axial Force. Journal of Solid Mechanics. 2021;13(3):269-285. doi:10.22034/jsm.2020.678358