فهرس المقالات Strain-Inertia Gradient Theory حرية الوصول المقاله صفحة الملخص نص كامل 1 - Nonlinear Vibration Analysis of FG Nano-Beams in Thermal Environment and Resting on Nonlinear Foundation based on Nonlocal and Strain-Inertia Gradient Theory Ebrahim Mahmoudpour