In this paper, we used various shear deformation functions for modelling isotropic, symmetric composite and sandwich plates discretized by a mixed finite element method based on the Lagrangian/Hermite interpolation functions. These shear deformation theories uses polynomial, trigonometric, hyperbolic and exponential functions through the thickness direction, allowing for zero transverse shear stresses at the top and bottom surfaces of the plate. All shear deformation functions are compared with other available analytical/3D elasticity solutions, are predicted the reasonable accuracy for investigated problems. Particularly, The present results show that the use of exponential shear deformation theory (Karama et al. 2003; Aydogu 2009) provides very good solutions for composite and sandwich plates.

• 박원태(공주대학교 건설환경공학부 교수, 공학박사) | Park, Won-Tae
• 장석윤(서울시립대학교 토목공학과 명예교수, (주)이산 상임고문) | Chang, Suk-Yoon
• 천경식((주) 바우컨설탄트 차장, 공학박사, 토목구조기술사) | Chun, Kyoung-Sik 교신저자