Energy absorption behaviors of 3D braided composites under impact loadings with frequency domain analysis
Energy absorption behaviors of 3D braided composites under impact loadings with frequency domain analysis
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DOI：
10.1002/pc.23334
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发表时间：
2016-05
影响因子：
5.2
通讯作者：
Yan Zhang-;Ping Wang;C. Guo
中科院分区：
文献类型：
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作者：
Yan Zhang-;Ping Wang;C. Guo
本文采用频域分析方法研究了三维编织复合材料在横向冲击和低速冲击下的吸能行为和损伤机理。横向冲击试验采用改良分离式霍普金森压杆收缩，冲击速度分别为13.6、17.8和22.8 m/s。低速冲击试验采用Instron 9250落重仪进行，冲击速度范围为1 ~ 6m /s。实验结果表明，随着冲击速度的增加，峰值载荷、位移至峰值载荷、总能量吸收均呈增加趋势。损伤形态显示三维编织复合材料的破坏模式。随着冲击速度的增加，破坏模式由树脂断裂转变为纤维断裂。频域分析结果表明，应力波幅值随冲击速度的增加而增大，但其对应的频率与冲击速度无关。不同的振幅区对应不同的破坏模式。变异较大。心神。[j] .中文信息学报，37(7):1620 - 1627,2016。©2014美国塑料工程师学会
This article presented the energy absorption behaviors and damage mechanisms of 3D braided composites under transverse impact and low-velocity impact with frequency domain analysis method. The transverse impact tests were contracted by modified split Hopkinson pressure bar with the impact velocities of 13.6, 17.8, and 22.8 m/s. The low-velocity impact tests were performed by Instron 9250 drop-weight instrument with the impact velocities ranging from 1 to 6 m/s. The experimental results shown that the peak load, displacement to peak load, total energy absorption increased with the increase of impact velocity. The damage morphologies showed the failure mode of 3D braided composite. Increased with the impact velocity, the failure mode changed from resin crack to fiber breakage. The frequency domain analysis results showed that the amplitude of stress wave increased with the increase of impact velocity, but its corresponding frequency was irrelevant to impact velocity. The different amplitude regions corresponded to different failure mode. POLYM. COMPOS., 37:1620–1627, 2016. © 2014 Society of Plastics Engineers