A hybrid bondline concept for bonded composite joints
A hybrid bondline concept for bonded composite joints
复制标题
DOI：
10.1016/j.ijadhadh.2016.03.025
复制
发表时间：
2016-07-01
影响因子：
3.4
通讯作者：
Huehne, C.
中科院分区：
文献类型：
--
作者：
Loebel, T.;Holzhueter, D.;Huehne, C.
根据过去的经验和在役损伤的发生，当局限制了复合材料结构在飞机上的粘接应用。然而，如果通过实现的设计特性（所谓的脱键停止特性）来阻止键内发生的脱键，则可以克服认证限制。在此基础上，提出了一种新型结合线结构。通过实现一个独特的相当延展性的热塑性相，获得了一个物理屏障来增长解键，从而获得了一个故障安全设计。采用两种不同的连接技术，即粘接和热固性复合焊接建立连接。为实现高强度连接，开发了一种复杂的混合结合线制造技术。通过显微切片、扫描电子显微镜（SEM）和能量色散x射线（EDX）分析等几种分析方法来检查接头的质量。此外，还通过静态双悬臂梁（DCB）和单搭剪（SLS）试验对其力学性能进行了评价。(C) 2016 Elsevier Ltd.版权所有。
Based on the experience in the past and the occurrence of in-service damages, the authorities restrict today the application of adhesive bonding of composite structures for aircraft applications. However, certification limitations can be overcome if occurring disbonds within a bond are stopped by implemented design features, so-called disbond stopping features. Consequently, a novel bondline architecture for bonded composite joints is proposed. By implementing a distinct rather ductile thermoplastic phase, a physical barrier for growing disbonds is obtained and thus a fail-safe design, respectively. Moreover, the joint is established by using two different joining technologies, namely adhesive bonding and thermoset composite welding. A sophisticated manufacturing technique is developed for the hybrid bondline concept to achieve a high strength joint. The joint's quality is examined by means of several analytical methods like microsections, scanning electron microscopy (SEM),, and energy-dispersive X-Ray (EDX) analysis. Additionally, the mechanical performance is evaluated by static Double Cantilever Beam (DCB) and Single Lap Shear (SLS) tests. (C) 2016 Elsevier Ltd. All rights reserved.