Abstract
Problem statement: In structural analysis using finite element software, a complex three-dimensional model affects the speed of calculation time. A simplified two-dimensional model should be used for analyzing structural responses to reduce the calculation time. Approach: This study presents a study on the analysis of the transverse shear stiffness of three-dimensional truss-like core sandwich beam using a simplified two-dimensional unit cell model. Three kinds of core topologies: A truss core, an X-truss core and a bi-directional corrugated-strip core are chosen to be analyzed in this study. The presented simplified two-dimensional unit cell model is compared in transverse shear stiffness with the three-dimensional finite element unit cell model. Results: In this study, the results show that the simplified two-dimensional unit cell model can be used for analyzing the transverse shear stiffness of three-dimensional truss-like core sandwich beam with a good correlative with the three-dimensional finite element unit cell model. Conclusion: From the finding, the transverse shear stiffness of three-dimensional truss-like core sandwich beam can be obtained from the simplified two-dimensional unit cell model. This simplified two-dimensional model can be used to substitute the complex three-dimensional finite element model; consequently, the speed of calculation time is increased.
Highlights
In recent structural engineering analysis, a finite element method is a tool for analyzing transverse shear stiffness of beam structures
The force and distortion relationship of unit cell approach is an analytical method for analyzing the transverse shear stiffness of sandwich beams
It was found that the force and distortion relationship of unit cell approach is an accurate method if applied for the truss-like core sandwich beam (Libove et al, 1951; Lok and Cheng, 2000; Leekitwattana et al, 2011)
Summary
In recent structural engineering analysis, a finite element method is a tool for analyzing transverse shear stiffness of beam structures. The force and distortion relationship of unit cell approach is an analytical method for analyzing the transverse shear stiffness of sandwich beams. Lok and Cheng (2000) have used it for analyzing the transverse shear stiffness of simple truss core sandwich beams. Leekitwattana et al (2011) have used the unit cell approach for analyzing the transverse shear stiffness of complex truss-like core sandwich beams. It was found that the force and distortion relationship of unit cell approach is an accurate method if applied for the truss-like core sandwich beam (Libove et al, 1951; Lok and Cheng, 2000; Leekitwattana et al, 2011)
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