Impact responses and residual flexural properties of narrow CFRP laminates
Impact responses and residual flexural properties of narrow CFRP laminates
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窄 CFRP 层压板的冲击响应和残余弯曲性能
DOI：
10.1016/j.compstruct.2014.01.018
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发表时间：
2014-05
影响因子：
6.3
通讯作者：
Qing Li
中科院分区：
文献类型：
--
作者：
Ou Guo;Yang Ju;Yongzhou Lin;Qing Li
本研究旨在利用能量分布图（EPD）确定窄碳纤维增强塑料（CFRP）层合板的冲击响应和剩余弯曲性能。对不同厚度的CFRP窄层板进行了一系列冲击试验，考察了其从初始破坏到完全破坏的过程和程度。进行了准静态三点弯曲试验，以表征冲击引起的残余弯曲性能的退化。EPD分别确定了侵彻阈值和裂纹阈值，将整体冲击能清晰地划分为三个区域。低冲击能时主要为基体开裂，中冲击能时主要为分层和纤维断裂，高冲击能时主要为完全断裂。还发现，利用上述两个阈值，归一化残余抗弯性能的退化可以分为三个区域，其中中能量区域损失最大，而归一化抗弯强度和抗弯模量的最大降幅小于20%。结果表明，在相同冲击能量下，6层试件的抗冲击性能和残余弯曲性能均低于9层试件；残余抗弯强度对冲击载荷的敏感性大于抗弯模量。
This study aims to identify the impact responses and residual flexural properties of narrow carbon fiber reinforced plastic (CFRP) laminates using the energy profile diagram (EPD). A serial of impact tests was performed with different thicknesses of narrow CFRP laminates to examine the damage process and extent from initiation to complete breakage. The quasi-static three-point bending tests were carried out to characterize the degradation of residual flexural properties induced by the impact. The overall impact energies are clearly separated into three regions by the penetration threshold and crack threshold respectively determined by the EPD. The main damage modes are matrix cracking for lower impact energies, delamination and fiber breakage for middle impact energies and complete breakage for higher impact energies. It is also found that the degradation of normalized residual flexural properties can be divided into three regions using these abovementioned two thresholds, of which the greatest loss occurs in the middle energy region, whilst the maximum reductions of normalized flexural strength and flexural modulus are smaller than 20% in the first region. By comparison, the 6-ply specimens are of lower impact resistance and lower residual flexural properties than the 9-ply specimens under same impact energy; and the residual flexural strength is more sensitive to impact loading than flexural modulus.
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影响因子：
2.9
作者：
Lawcock, G;Ye, L;Mai, YW
通讯作者：
Mai, YW
影响因子：
9.1
作者：
Petit, Sandrine;Bouvet, Christophe;Barrau, Jean-Jacques
通讯作者：
Barrau, Jean-Jacques
影响因子：
6.3
作者：
C. Santiuste;S. Sanchez-Saez;E. Barbero
通讯作者：
C. Santiuste;S. Sanchez-Saez;E. Barbero
DOI：
10.1016/0010-4361(95)96809-k
发表时间：
1995-07
期刊：
Composites
影响因子：
--
作者：
G. Papanicolaou;C. D. Stavropoulos
通讯作者：
G. Papanicolaou;C. D. Stavropoulos
影响因子：
6.3
作者：
Liu, Qiang;Lin, Yongzhou;Li, Qing
通讯作者：
Li, Qing