A comparison of IR- and UV-laser pretreatment to increase the bonding strength of adhesively joined aluminum/CFRP components
A comparison of IR- and UV-laser pretreatment to increase the bonding strength of adhesively joined aluminum/CFRP components
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DOI：
10.1016/j.compositesa.2017.02.014
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发表时间：
2017-05-01
影响因子：
8.7
通讯作者：
Knoblauch, Volker
中科院分区：
文献类型：
--
作者：
Reitz, Valentina;Meinhard, Dieter;Knoblauch, Volker
在这项工作中，不同的CFRP层压板（称为“A”和“B”）进行了预处理，使用红外和紫外激光之前，粘合剂粘结。实现的表面条件，其特征在于通过光学方法和相关的机械性能的粘接混合Al/CFRP单搭接接头。两个相反的效果可以检测到两个CFRP层压板后，红外激光预处理：强度增加表面活化和减少削弱的纤维基体界面附近的表面区域。然而，使用UV-辐射，它是可能的，以激活的表面无损伤的A，而B表现出热诱导损伤的纤维基质的粘合力相比，红外激光处理。此外，它表明，激光预处理的表面活化强烈依赖于所使用的CFRP层压板。IR-和UV-激光预处理A导致剪切强度的显著增加，而对于B，与作为参考过程的用丙酮的化学清洁相比，甚至观察到轻微的降低。(C)2017爱思唯尔有限公司版权所有
In this work different CFRP laminates (called "A" and "B") were pre-treated using IR- and UV-laser prior to adhesive bonding. The achieved surface conditions were characterized by optical methods and correlated with mechanical properties of adhesively bonded hybrid Al/CFRP single-lap joints. Two opposing effects could be detected on both CFRP laminates after IR-laser pre-treatment: strength increasing surface activation and reducing weakening of the fiber-matrix interface in near surface areas. However, using UV-radiation it was possible to activate the surface damage-free for A whereas B exhibited thermal induced damaging of the fiber-matrix adhesion comparable to IR laser treatment. Furthermore, it was shown that surface activation by laser pre-treatment strongly depends on the used CFRP laminate. IR- and UV-laser pre-treatment of A leads to a significant increase of shear strength, whereas for B even a slight reduction was observed compared to chemical cleaning with acetone which was the reference process. (C) 2017 Elsevier Ltd. All rights reserved.