Mechanical Response of All-composite Pyramidal Lattice Truss Core Sandwich Structures

材料科学技术（英文）, 2011, 27(6): 570-576.

^1, , ^2, , ^3, , ^4, , ^5,

1.No. 201 Faculty, Xi'an Research Institute of High-tech, Xi'an 710025, China; Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

2.Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

3.Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

4.Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

5.No. 201 Faculty, Xi'an Research Institute of High-tech, Xi'an 710025, China

基金项目: the Program of Excellent Team in Harbin Institute of Technology.L.Ma acknowledges the Program for New Century Excellent Talents in University(NCET-08-0152) the National Natural Science Foundation of China(90816024;10872059) the Major State Basic Research Development Program of China(2011CB610303) the Fundamental Research Funds for the central Universities(HIT.NSRIF.2010069)

Mechanical Response of All-composite Pyramidal Lattice Truss Core Sandwich Structures

Ming Li ^1, , Linzhi Wu ^2, , Li Ma ^3, , Bing Wang ^4, , Zhengxi Guan ^5,

1.No. 201 Faculty, Xi'an Research Institute of High-tech, Xi'an 710025, China; Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

2.Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

3.Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

4.Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

5.No. 201 Faculty, Xi'an Research Institute of High-tech, Xi'an 710025, China

Keywords： Sandwich structures

The mechanical performance of an all-composite pyramidal lattice truss core sandwich structure was investigated both theoretically and experimentally. Sandwich structures were fabricated with a hot compression molding method using carbon fiber reinforced composite T700/3234. The out-of-plane compression and shear tests were conducted. Experimental results showed that the all-composite pyramidal lattice truss core sandwich structures were more weight efficient than other metallic lattice truss core sandwich structures. Failure modes revealed that node rupture dominated the mechanical behavior of sandwich structures.

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