Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 56, Issue -, Pages 226-238Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2013.10.008
Keywords
Carbon fiber; Mechanical properties; Analytical modeling; Mechanical testing
Funding
- Major State Basic Research Development Program of China (973 Program) [2011CB610303]
- National Science Foundation of China [11222216, 11302060]
- U.S. Air Force Office of Scientific Research under AFOSR YIP grant [FA 9550-10-1-0145]
- Natural Scientific Research Innovation Foundation in Harbin Institute of Technology [HIT.NSRIF.2014025]
- Key Laboratory of Composite Materials in Special Environment
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We manufactured sandwich-walled cylindrical shells with aluminum pyramidal truss core of constant curvature employing an interlocking fabrication technique for the metallic core. The skins were made of carbon-fiber reinforced composites and co-cured with the metallic truss core. Thereafter, we carried out axial compression tests on some representative samples to investigate the failure modes of these structures and compared with an analytical failure map developed to account for Euler buckling, shell buckling, local buckling between reinforcements and face-crushing. The experimental data closely matched the analytically predicted behavior of the cylinders. In particular, we found that local buckling and face crushing modes can exist together and are the most important modes of failure of the fabricated structure. (C) 2013 Elsevier Ltd. All rights reserved.
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