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Silicone bonded steel-glass joints under high temperature
International Journal of Adhesion and Adhesives ( IF 3.4 ) Pub Date : 2021-04-27 , DOI: 10.1016/j.ijadhadh.2021.102892
L. Biolzi , F. Morelli , I. Panzera , W. Salvatore

The use of structural adhesive for the bonding of steel-to-glass elements increased along with the structural and aesthetic requirements of high-performance transparent building skins, providing better performance of the steel-glass assembly reducing the stress concentration in the glass ply. However, the behavior of bonded joints subjected to high temperatures and the alteration of their mechanical characteristics after a heating process are fields that need to be deepened. The present paper aims at providing an innovative contribution to the gap in the knowledge of the behavior of bonded joints at ambient temperatures up to 300 °C. A detailed overview of the test set-up followed by the results of the mechanical tests will be provided. The tests are composed of two main steps that are namely the heating at different temperatures of the joint specimens and the definition of the residual capacity of the joint, under tear or shear load. A comparison of the mechanical behavior will be provided for different structural adhesives: commonly used adhesive DC993, SG20, SG500, and SIKA265 characterized by a soft elastic modulus, and TSSA, a high strength structural glazing silicone film adhesive. The test allows proposing residual resistance criteria that, even if they are obtained for a specific type of steel-glass joint, provide useful information about the choice of the adhesive in cases in which high temperatures are expected. Finally, a finite model is calibrated on the basis of the experimental results, supplying information about the possible modeling choices and the influence of the specific geometry adopted in tests on the results.



中文翻译:

高温下硅酮键合的钢玻璃接头

随着高性能透明建筑表皮的结构和美学要求的提高,结构胶用于钢-玻璃元件的粘合的使用也增加了,从而提供了钢-玻璃组件更好的性能,从而减少了玻璃板中的应力集中。但是,高温下的粘结接头的行为及其在加热过程后机械特性的变化是需要加深的领域。本文旨在为在高达300°C的环境温度下粘接接头行为的知识方面的差距提供创新的贡献。将提供测试设置的详细概述,以及机械测试的结果。测试由两个主要步骤组成,即在不同温度下对接头试样进行加热,以及在撕裂或剪切载荷下确定接头的残余容量。将对不同结构的粘合剂进行机械性能的比较:常用的具有软弹性模量的粘合剂DC993,SG20,SG500和SIKA265,以及TSSA(高强度的结构上光有机硅膜粘合剂)。该测试允许提出残余电阻标准,即使已针对特定类型的钢-玻璃接头获得了残余电阻标准,也可提供有关在预期高温的情况下选择粘合剂的有用信息。最后,根据实验结果校准有限模型,

更新日期:2021-05-05
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