Fast cure of stable semi-pregs via VBO cure

Fast cure of stable semi-pregs via VBO cure
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通过 VBO 固化快速固化稳定的半浸料

DOI:
10.1080/20550340.2020.1869891
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发表时间:
2020
期刊:
Advanced Manufacturing: Polymer & Composites Science
影响因子:
--
通讯作者:
Nutt, Steven
Nutt, Steven
中科院分区:
--
文献类型:
--
作者:
Bender, David B.;Centea, Timotei;Nutt, Steven

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为了解决在高性能复合材料加工中提高效率的需要,设计、建模和评估了仅真空袋(VBO)半浸渍体。半浸料的特点是乙烯基混合树脂配制快速固化。建立了一个描述树脂固化动力学行为的模型,并用于指导有效固化周期的设计。半预浸料的特征在于树脂在纤维床上的不连续分布。相对于传统的高压灭菌器外密封件(OoA),该形式凭借具有短呼气距离的多个空气排出路径而赋予高的贯穿厚度的透气性。动力学模型用于从半浸料产生板的测试矩阵。微观结构质量,层间剪切强度,和玻璃化转变温度进行了比较,一个控制面板具有较长的,传统的固化周期。结果表明,快速固化树脂可与固化成型和半浸料形式结合使用,以设计适当的VBO固化周期,从而在不使用高压灭菌器的情况下始终产生具有低缺陷含量的部件。
To address the need for increased efficiency in high performance composite processing, a vacuum bag only (VBO) semi-preg was designed, modeled, and evaluated. The semi-preg featured a vinyl hybrid resin formulated for rapid cure. A model was developed to describe the kinetic behavior of the resin, and then was employed to guide the design of efficient cure cycles. The semi-preg featured a discontinuous distribution of resin on the fiber bed. The format imparted high through-thickness air permeability by virtue of the multitude of air evacuation pathways with short breath-out distances relative to conventional out-of-autoclave prepregs (OoA). The kinetic model was used to create a test matrix of panels from the semi-pregs. Microstructural quality, interlaminar shear strength, and glass transition temperature were compared to a control panel with a longer, conventional cure cycle. The results demonstrated that fast-cure resins can be used in conjunction with cure modeling and semi-preg formats to design appropriate VBO cure cycles that consistently yield parts with low defect contents without autoclaves.
用于制造具有高厚度渗透性的非热压罐预浸料的聚合物薄膜去湿
DOI: 10.1016/j.compositesa.2018.08.002
发表时间: 2018
期刊: Composites Part A: Applied Science and Manufacturing
影响因子: --
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发表时间: 2016-11-01
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