فهرس المقالات Functionally graded viscoelastic circular sandwich plate حرية الوصول المقاله صفحة الملخص نص كامل 1 - A Zigzag Theory with Local Shear Correction Factors for Semi-Analytical Bending Modal Analysis of Functionally Graded Viscoelastic Circular Sandwich Plates M Shariyat M.M Alipour