Mechanical properties of lattice grid composites |
| |
Authors: | Hualin Fan Daining Fang Fengnian Jin |
| |
Institution: | (1) Department of Engineering Mechanics, Tsinghua University, 100084 Beijing, China;(2) College of Science, PLA University of Science and Technology, 210007 Nanjing, China |
| |
Abstract: | An equivalent continuum method only considering the stretching deformation of struts was used to study the in-plane stiffness
and strength of planar lattice grid composite materials. The initial yield equations of lattices were deduced. Initial yield
surfaces were depicted separately in different 3D and 2D stress spaces. The failure envelope is a polyhedron in 3D spaces
and a polygon in 2D spaces. Each plane or line of the failure envelope is corresponding to the yield or buckling of a typical
bar row. For lattices with more than three bar rows, subsequent yield of the other bar row after initial yield made the lattice
achieve greater limit strength. The importance of the buckling strength of the grids was strengthened while the grids were
relative sparse. The integration model of the method was used to study the nonlinear mechanical properties of strain hardening
grids. It was shown that the integration equation could accurately model the complete stress–strain curves of the grids within
small deformations.
The project supported by the China Postdoctoral Science Foundation (20060400465) and the National Natural Science Foundation
of China (10702033).
An erratum to this article can be found at |
| |
Keywords: | Lattice grid composites Mechanical properties Buckling Plastic deformation Analytical modeling |
本文献已被 维普 SpringerLink 等数据库收录! |