Mechanical behavior of sandwich composite beams made of foams and functionally graded materials

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:50

Article

Birsan, M.^1,2  Sadowski, T.²  Marsavina, L.³  Linul, E.³  Pietras, D.² 

[1] Univ AI Cuza Iasi, Dept Math, Iasi 700506, Romania

[2] Lublin Univ Technol, Fac Civil Engn & Architecture, Lublin, Poland

[3] Politehn Univ Timisoara, Dept Strength Mat, Timisoara, Romania

关键词: Composite materials;    Foam structures;    Functionally graded;    Sandwich materials;    Effective stiffness properties;    Beam;    Bending;   

DOI  :  10.1016/j.ijsolstr.2012.10.011

来源: Elsevier

【 摘 要 】

We investigate sandwich composite beams using a direct approach which models slender bodies as deformable curves endowed with a certain microstructure. We derive general formulas for the effective stiffness coefficients of composite elastic beams made of several non-homogeneous materials. A special attention is given to sandwich beams with foam core, which are made of functionally graded or piecewise homogeneous materials. In the case of small deformations, the theoretical predictions are compared with experimental measurements for the three-point bending of sandwich beams, showing a very good agreement. For functionally graded sandwich columns we obtain the analytical solutions of bending, torsion and extension problems and compare them with numerical results computed by the finite element method. (C) 2012 Elsevier Ltd. All rights reserved.

【 授权许可】

Free