Experimental investigation on deformation and strength of carbon/epoxy laminated curved beams

被引：111
|
作者：
Hao, Wenfeng [1 ]
Ge, Dongyun [1 ]
Ma, Yinji [1 ]
Yao, Xuefeng [1 ]
Shi, Yue [1 ]
机构：
[1] Tsinghua Univ, Dept Engn Mech, Appl Mech Lab, Beijing 100084, Peoples R China
来源：
POLYMER TESTING | 2012年 / 31卷 / 04期
关键词：
Laminated curved beam; Digital speckle correlation method; Four-point-bending; Interlaminar deformation; Delamination; NUMERICAL-ANALYSIS; TENSILE-STRENGTH; DELAMINATION;
D O I：
10.1016/j.polymertesting.2012.02.003
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Both the deformation and strength of carbon/epoxy laminated curved beams with variable curvature and thickness are studied experimentally using the Digital Speckle Correlation Method (DSCM) and a Four-Point-Bending test configuration. First, the relationships between the strain and the applied load on the curved beams with different thicknesses and different radius-thickness ratios are studied. Second, both the failure strength and the maximum interlaminar radial stresses of the curved beams are determined, and the distribution and evolution of full field strain in the laminated curved beams are obtained using DSCM. Finally, the interlaminar deformation and delamination mechanisms of carbon/epoxy laminated curved beams are analyzed. These results play an important role for predicting strength and evaluating lifetime of laminated curved beams. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：520 / 526
页数：7
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