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Experimental investigation on timber-glass double-lap adhesive joints
International Journal of Adhesion and Adhesives ( IF 3.4 ) Pub Date : 2021-01-30 , DOI: 10.1016/j.ijadhadh.2021.102818
Francesco Marchione , Placido Munafò

Recent advances in research in the field of structural adhesives have led to the development of new hybrid multi-material structures. In this type of application, different components are combined to create high performance structural elements characterized by low weight and ease of installation.

In this experimental study, a series of shear tests were conducted on double-lap adhesive joints, in which float glass was adhesively bonded with mahogany and pine adherends. In particular, the effects resulting from the use of two types of selected epoxy adhesives and different surface treatment methods for timber adherends (i.e. dipping and varnishing treatments) were analysed. This experimental campaign aims to verify the compatibility of the adhesive joint between the mentioned adherends, with particular reference to its application in the field of civil engineering.

The results obtained show that the epoxy EPX1 adhesive provides the best performance in terms of stiffness and strength for the substrate combination with untreated mahogany and float glass. In fact, this configuration leads to the stiffest type of joint while achieving high load values. EPX2 adhesive achieves higher ultimate strength values in all other combinations of adhesives analysed and exhibits greater ductility. The results demonstrate an excellent compatibility between the materials considered and the effectiveness of the adhesive joint for the intended applications.



中文翻译:

木材-玻璃双搭接接头的实验研究

结构粘合剂领域的最新研究进展导致了新型混合多材料结构的发展。在这种类型的应用中,将不同的组件组合在一起,以创建具有重量轻且易于安装的高性能结构元件。

在这项实验研究中,在双搭接胶接接头上进行了一系列剪切测试,其中浮法玻璃与桃花心木和松木被粘物粘接在一起。特别是,分析了使用两种类型的环氧胶粘剂和对木材被粘物使用不同的表面处理方法(即浸涂和上光处理)所产生的效果。该实验活动旨在验证所提到的被粘物之间的粘合剂接头的兼容性,特别是要参考其在土木工程领域的应用。

所得结果表明,环氧EPX1胶粘剂在与未经处理的红木和浮法玻璃组合的基材上,在刚度和强度方面提供了最佳性能。实际上,这种构造导致了接头的最硬类型,同时实现了高载荷值。在所有其他已分析的粘合剂组合中,EPX2粘合剂均能达到更高的极限强度值,并具有更大的延展性。结果表明,所考虑的材料与粘合剂接头在预期应用中的有效性之间具有极好的兼容性。

更新日期:2021-02-08
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