Ultrasound-assisted vat photopolymerization 3D printing of preferentially organized carbon fiber reinforced polymer composites
Ultrasound-assisted vat photopolymerization 3D printing of preferentially organized carbon fiber reinforced polymer composites
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DOI：
10.1016/j.jmapro.2020.04.029
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发表时间：
2020-08-01
影响因子：
6.2
通讯作者：
Shirwaiker, Rohan
中科院分区：
文献类型：
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作者：
Asif, Suleman;Chansoria, Parth;Shirwaiker, Rohan
在这项研究中，我们提出了一种新的瓮光聚合3D打印工艺，该工艺使用来自超声驻波的声辐射力来组织光固化树脂内的碳短纤维。开发了一个腔室来在树脂中产生驻波体声波，以使碳纤维沿着驻波的节点排列。然后通过暴露于UV选择性地固化树脂以产生狗骨样本形状的构造。测定了纤维浓度（0.5%、1%、2%和4%w/v）和排列方向（平行、垂直）对碳纤维增强聚合物复合材料的拉伸强度的影响。由于纤维对齐，具有1%w/v的结构显示出拉伸强度的最高增益。对于纤维浓度为1%的双层结构，与随机分布纤维和无纤维的结构相比，0度-0度结构（纤维沿单轴测试方向沿着排列）显示出显著更高的拉伸强度，随后是0度-90度结构。
In this study, we present a new vat photopolymerization 3D printing process that uses acoustic radiation forces from ultrasonic standing waves to organize carbon short fibers within a photocurable resin. A chamber was developed to generate the standing bulk acoustic wave in the resin to align the carbon fibers along the nodes of the standing wave. The resin was then selectively cured to create constructs in the shape of a dog bone specimen by exposing to UV. The effect of fiber concentration (0.5 %, 1 %, 2 %, and 4 % w/v) and direction of alignment (parallel, perpendicular) on tensile strength of the carbon fiber reinforced polymer composites was determined. The constructs with 1 % w/v showed the highest gain in tensile strength due to the fiber alignment. For two-layered constructs with 1 % fiber concentration, 0 degrees-0 degrees constructs (fibers aligned along the uniaxial testing direction) demonstrated significantly higher tensile strength followed by 0 degrees-90 degrees constructs compared to constructs with randomly distributed fibers and without fibers.