Shear and bending performance of carbon fiber composite sandwich panels with pyramidal truss cores

被引：169
作者：
Xiong, J. [1 ,2 ]
Ma, L. [1 ]
Pan, S. [1 ]
Wu, L. [1 ]
Papadopoulos, J. [2 ]
Vaziri, A. [2 ]
机构：
[1] Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150001, Peoples R China
[2] Northeastern Univ, Dept Mech & Ind Engn, Boston, MA 02115 USA
来源：
ACTA MATERIALIA | 2012年 / 60卷 / 04期
基金：
美国国家科学基金会;
关键词：
Composites; Pyramidal truss cores; Shear; Bending; Failure mechanisms; STRUCTURAL PERFORMANCE; COLLAPSE MECHANISMS; FOAM CORE; FAILURE; BEAMS; BEHAVIOR; FACES;
D O I：
10.1016/j.actamat.2011.11.028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Structural performance in direct (pure) shear and three-point bending was investigated for sandwich panels with a carbon fiber pyramidal truss core. Analytical estimates for sandwich panel strength for each loading condition were presented for possible competing failure modes. In the experimental part of the study, pyramidal truss cores were made using the hot press molding technique and then attached to flat carbon fiber composite face sheets to build all-composite sandwich panels. Panels with different configurations (e.g., core relative density and face sheet thickness) were tested to probe different failure modes and investigate the mechanical properties. In general, measured failure loads showed good agreement with the analytical predictions. Failure mechanism maps illustrate the controlling failure mechanisms in various regions of parameter space. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1455 / 1466
页数：12
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