Experimental investigation on deformation and strength of carbon/epoxy laminated curved beams
Experimental investigation on deformation and strength of carbon/epoxy laminated curved beams
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DOI：
10.1016/j.polymertesting.2012.02.003
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发表时间：
2012-06-01
期刊：
影响因子：
5.1
通讯作者：
Shi, Yue
中科院分区：
文献类型：
--
作者：
Hao, Wenfeng;Ge, Dongyun;Shi, Yue
使用数字散斑相关法（DSCM）和四点弯曲测试配置对具有可变曲率和厚度的碳/环氧树脂层压曲梁的变形和强度进行了实验研究。首先，研究了不同厚度、不同径厚比的曲梁上的应变与所施加载荷之间的关系。其次，确定了曲梁的失效强度和最大层间径向应力，并利用 DSCM 获得了层合曲梁的全场应变分布和演化。最后，分析了碳/环氧树脂叠层曲梁的层间变形和分层机理。这些结果对于预测层合曲梁的强度和评估寿命具有重要作用。 (C) 2012 Elsevier Ltd. 保留所有权利。
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.