Library Subscription: Guest
Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections
International Journal for Multiscale Computational Engineering
IF: 1.016 5-Year IF: 1.194 SJR: 0.452 SNIP: 0.68 CiteScore™: 1.18

ISSN Print: 1543-1649
ISSN Online: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2018026066
pages 209-229

INTERLAMINAR SCALE EFFECT OF MULTILAYER COMPOSITE MICROBEAMS BASED ON A NEW MODIFIED COUPLE-STRESS THEORY AND THE HU–WASHIZU VARIATIONAL THEOREM

Zhen Wu
School of Aeronautics, Northwestern Polytechnical University, Xian 710072, China
Xiaohui Ren
School of Mechanical Engineering, Xi'an Aeronautical University, Xian 710065, China
Bin Ji
Shanghai Key Laboratory of Spacecraft Mechanism & Shanghai Aerospace System Engineering, Shanghai 201108, China
Wanji Chen
School of Aeronautics, Northwestern Polytechnical University, Xian 710072, China

ABSTRACT

Few studies on the interlaminar scale effect of multilayer composite beams are reported in the published literature. Thus, a refined higher-order zigzag model satisfying the transverse shear traction-free condition is proposed for analysis of the interlaminar scale effect of composite microbeams. The number of unknown parameters in the proposed model is independent of the number of layers. Moreover, there are only four displacement parameters in the displacement field. Differing from previous work, a three-dimensional equilibrium equation including the scale effect is proposed to accurately predict the interlaminar scale effect. It is significant that the higher-order derivatives of the displacement parameters are eliminated from the transverse shear stress components by using the three-field Hu–Washizu variational principle. By analyzing the bending behaviors of microscale composite beams, the effects of the microlength-scale parameter in each ply on the displacements and the stress of the multilayer composite beams have been investigated. The numerical results showed that with an increase in the material length constants, displacements, and in-plane stress gradually decrease, whereas the transverse shear stress at different layers does not completely decrease. Thus, the interlaminar scale effects of composite microbeams differ from those of displacements and in-plane stresses. With an increase in the number of layers, the effects of the microlength-scale length parameter on the displacements and interlaminar stresses gradually decrease.


Articles with similar content:

SIZE-DEPENDENT VIBRATION ANALYSIS OF MULTILAYER COMPOSITE MICROBEAM BASED ON NEW MODIFIED COUPLE STRESS THEORY
International Journal for Multiscale Computational Engineering, Vol.15, 2017, issue 6
Wanji Chen , Zhen Wu, Zhichun Yang
A Nonclassical Reddy-Levinson Beam Model Based on a Modified Couple Stress Theory
International Journal for Multiscale Computational Engineering, Vol.8, 2010, issue 2
J. N. Reddy, Xin-Lin Gao, H. M. Ma
THERMOELASTIC BENDING ANALYSIS OF ORTHOTROPIC PLATES USING HYPERBOLIC SHEAR DEFORMATION THEORY
Composites: Mechanics, Computations, Applications: An International Journal, Vol.4, 2013, issue 3
Atteshamuddin Shamshuddin Sayyad, Yuwaraj M. Ghugal, B. M. Shinde
STATIC DEFLECTION ANALYSIS OF FLEXURAL SIMPLY SUPPORTED SECTORIAL MICRO-PLATE USING P-VERSION FINITE-ELEMENT METHOD
International Journal for Multiscale Computational Engineering, Vol.9, 2011, issue 2
H. Farahmand , S. Arabnejad, A. R. Ahmadi
Molecular Dynamics Study of the Specimen Size and Imperfection Effects on the Failure Responses of Multi-Nanobar Structures
International Journal for Multiscale Computational Engineering, Vol.8, 2010, issue 2
Luming Shen, Zhen Chen