A Reduced Finite Element Model for Analyzing the Transverse Shear Stiffness of Truss-Like Core Sandwich Beam

Abstract

Problem statement:In structural analysis using finite element software, a number of finite element equations affect the speed of calculation time. A reduced finite element model should be used for analyzing structural responses to reduce the calculation time. Approach: This study presents the analysis of transverse shear stiffness of truss-like core sandwich beam using the reduced finite element model based on a unit cell approach. Two kinds of core topologies; an X-truss core and a bi-directional X-truss core, were chosen to be analyzed. The presented reduced finite element model based on the unit cell approach was compared in transverse shear stiffness with the conventional three-point loaded beam approach. Results: Results showed that the unit cell approach could be used for analyzing the transverse shear stiffness of truss-like core sandwich beam with a good correlative with the conventional three-point loaded beam approach and a significantly reduced number of finite element equations. Conclusion: The transverse shear stiffness of truss-like core sandwich beam can be obtained from the reduced finite element model based on unit cell approach. This reduced finite element model can be used to reduce the number of finite element equations; consequently, the speed of calculation time is increased.

A Simplified Two-Dimentional Unit Cell Model for Analyzing the Transverse Shear Stiffness of Three-Dimentional Truss-Like Core Sandwich Beam

“…It is equal to (s c2f c )/(h c -t c ). Thus, the horizontal length of the unit cell, sc, can be obtained from this expression (Chomphan and Leekitwattana, 2011). …”

Basics of Multibody Systems: Presented by Practical Simulation Examples of Spine Models

“…But each additional element also means additional computational time. Solving such large numbers of FE equations leads to an enormously time-consuming calculation as in [15,16]. The accuracy of the system and the expected computing time must therefore be carefully matched.…”