Mechanical properties and failure behavior of the sandwich structures with carbon fiber-reinforced X-type lattice truss core

Mechanical properties and failure behavior of the sandwich structures with carbon... As we known, composite sandwich structure with advantages of high specific strength/modulus, high temperature resistance, damping, etc., which is widely used in various fields. And there is more space in its core to supply for multi-functional filler, which provides the possibility for special engineering applications (such as heat insulation, wave absorption, etc.). In this paper, a new type of lightweight composite lattice structure (called X-type lattice structure) is proposed based on the stretching dominated idea of quadrilateral grid and lattice strut. The mechanical properties and failure behavior of X-type lattice structures are investigated based on theoretical and experimental methods. The experiment results show that the mechanical properties of the X-type lattice sandwich structure is more superior than those of other pyramidal lattice sandwich structures. In theoretical analysis, we found the fact that the shear equivalent stiffness of X-type lattice structure is independent of the loading direction, while the shear strength is related to the loading direction. Meanwhile, its minimum shear strength will be reached at the 0 degrees loading direction, and the maximum shear strength will be obtained when the loading direction is 45 degrees. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Composite Structures Elsevier

Mechanical properties and failure behavior of the sandwich structures with carbon fiber-reinforced X-type lattice truss core

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0263-8223
eISSN
1879-1085
D.O.I.
10.1016/j.compstruct.2017.11.066
Publisher site
See Article on Publisher Site

Abstract

As we known, composite sandwich structure with advantages of high specific strength/modulus, high temperature resistance, damping, etc., which is widely used in various fields. And there is more space in its core to supply for multi-functional filler, which provides the possibility for special engineering applications (such as heat insulation, wave absorption, etc.). In this paper, a new type of lightweight composite lattice structure (called X-type lattice structure) is proposed based on the stretching dominated idea of quadrilateral grid and lattice strut. The mechanical properties and failure behavior of X-type lattice structures are investigated based on theoretical and experimental methods. The experiment results show that the mechanical properties of the X-type lattice sandwich structure is more superior than those of other pyramidal lattice sandwich structures. In theoretical analysis, we found the fact that the shear equivalent stiffness of X-type lattice structure is independent of the loading direction, while the shear strength is related to the loading direction. Meanwhile, its minimum shear strength will be reached at the 0 degrees loading direction, and the maximum shear strength will be obtained when the loading direction is 45 degrees.

Journal

Composite StructuresElsevier

Published: Feb 1, 2018

References

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