...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of mechanics and materials in design >Structural behavior of double-lap shear adhesive joints with metal substrates under humid conditions
【24h】

Structural behavior of double-lap shear adhesive joints with metal substrates under humid conditions

机译：潮湿条件下与金属基材的双搭接剪切粘合接头的结构行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Structural adhesive bonding is very often used joining method in aerospace and automotive industry, but in civil engineering, especially in facade applications, semi-flexible or semi-rigid adhesives are still rarely used. The article is focused on experimental analyses of structural adhesive joints intended for facade applications (e.g. bonding of facade cladding elements to the supporting substructure). The experimental study contains a comparison of the structural behavior of two different adhesives in joints with aluminum or zinc-electroplated steel substrates with various surface pre-treatments. The main goal of the study is a comparison of the mechanical properties of joints exposed and unexposed to laboratory ageing conditions; immersion on demineralized water according to ETAG 002 (Guideline for European Technical Approval for Structural Sealant Glazing Kits). Water content in adhesive layer can change significantly its mechanical properties and adhesion of glue to the substrate. Ageing resistance of joint can be improved by durability increasing of the substrate. For this reason, two different substrate materials with various surface treatments (mechanical roughening, smooth surface, anodizing) were tested. Different adhesive resistance against humid conditions was observed depending on the substrate material and pre-treatment.STP polymer joints showed strength reduction by 30% after immersion for almost all substrates, while acrylate adhesive proved 20% strength reduction for roughened aluminum substrate and 60% strength reduction for zinc-electroplated steel substrate with a roughened surface. The zinc-electroplated steel substrate showed problematic adhesion in case of the acrylate adhesive both reference set of specimens and specimens exposed to laboratory ageing. The positive effect of roughening on adhesion and ageing resistance was clearly observed in the specimens bonded by the acrylate adhesive.
机译：在航空航天和汽车工业中，结构粘合剂的粘结是非常常用的连接方法，但是在土木工程中，尤其是在外墙应用中，仍然很少使用半柔性或半刚性粘合剂。本文重点关注用于外墙应用的结构胶合接头的实验分析（例如，将外墙覆层元素粘合到支撑子结构上）。实验研究比较了两种不同胶粘剂在经过各种表面预处理的铝或镀锌钢基底连接处的结构行为。研究的主要目的是比较暴露和未暴露于实验室老化条件下的接头的机械性能；根据ETAG 002（结构密封胶玻璃套件的欧洲技术批准指南）浸入软化水​​中。粘合剂层中的水含量会显着改变其机械性能以及胶水与基材的粘合力。通过提高基板的耐久性，可以提高接头的耐老化性。因此，测试了两种具有不同表面处理（机械粗糙化，光滑表面，阳极氧化处理）的基材。取决于基材的材料和预处理，观察到了不同的耐湿条件下的粘合性.STP聚合物接头浸入后几乎对所有基材显示出30％的强度降低，而丙烯酸酯粘合剂对粗糙的铝质基材显示出20％的强度降低和60％的强度表面粗糙的电镀锌钢基材的还原处理。在丙烯酸​​酯粘合剂的情况下，无论是参考样品组还是暴露于实验室老化的样品，电镀锌的钢基材都显示出粘附性问题。在丙烯酸​​酯胶粘剂粘合的样品中，可以清楚地看到粗糙化对粘合性和耐老化性的积极影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号