Energy Absorption of Integrated Functionally Gradient Syntactic Foam
Energy Absorption of Integrated Functionally Gradient Syntactic Foam
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DOI：
10.1177/0021955x10368321
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发表时间：
2010-07-01
影响因子：
2.5
通讯作者：
Woldesenbet, Eyassu
中科院分区：
文献类型：
--
作者：
Chittineni, Kanakaji;Woldesenbet, Eyassu
功能梯度复合泡沫塑料（FGSF）的制造使用层上层集成技术在五个不同的层序列。四种不同类型的玻璃微球，具有相似的外径，但不同的内径用于制造集成FGSF（IFGSF）中的各个层。每个IFGSF层中微球的体积分数保持恒定在60%，以保持结构的均匀性。IFGSF的不同层在主要固化发生之前被整合。在MTS-810伺服液压试验机上研究了IFGSF的平压和侧压性能。与密度相近的普通复合泡沫塑料相比，平向和边向IFGSF的能量吸收分别增加了200%和20%以上。此外，IFGSF的压缩性能相比，粘结的FGSF显示出显着的增量。此外，将IFGSF进行相互比较，以检查层排序对平面和边缘压缩行为的影响。利用光学显微镜和扫描电镜对层序效应对IFGSF裂纹扩展行为进行了监测和分析。
Functionally gradient syntactic foams (FGSFs) are fabricated using a layer-over-layer integrated technique in five different layer sequences. Four different types of glass microballoons, with similar outer diameters but different inner diameters are used to fabricate individual layers in integrated FGSFs (IFGSFs). The volume fraction of microballoons in each IFGSF layer is kept constant at 60% to maintain uniformity in the structure. The different layers of IFGSFs are integrated before major solidification takes place. IFGSFs are investigated for flat-wise and edge-wise compression properties on a MTS-810 servo hydraulic machine. Compared to plain syntactic foams with a similar density, it is found that the energy absorption of flat-wise and edge-wise IFGSFs increase by more than 200% and 20%, respectively. Also, the IFGSFs show a dramatic increment in compressive properties compared to adhesively bonded FGSFs. Furthermore, IFGSFs are compared to one another to examine the effect of layer sequencing on flat-wise and edge-wise compressive behavior. The layer sequencing effect on crack propagation behavior of IFGSF is carefully monitored and analyzed with an optical microscope (OM) and a scanning electron microscope (SEM).