Science of Mixed-Adhesive Joints
Science of Mixed-Adhesive Joints
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混合粘合剂接头科学
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
M. Fitton
中科院分区：
文献类型：
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作者：
J. Broughton;M. Fitton
粘接接头是连接部件的有效手段，特别是在被粘物薄且彼此不相似的情况下，为许多汽车、航空航天、船舶和越来越多的民用基础设施应用提供连接解决方案。实际上，在许多情况下，粘合接头的能力通常受到被粘物的强度的限制，无论是屈服还是全厚度失效，例如分层。混合粘合剂技术已被提出作为一种调整胶层刚度的手段（通常通过在胶层中放置至少两种具有对比刚度的粘合剂），以提高接头能力，即通过减少总是位于粘合重叠端部的应力集中。讨论了各种分析和数值科学方法，旨在建立混合粘合剂接头设计的关键参数，包括实验验证，在某些情况下，静态接头强度提高了75%以上。
Adhesively bonded joints are an effective means of connecting components, particularly in cases where the adherends are thin and dissimilar to one another, providing joining solutions in numerous automotive, aerospace, marine and increasingly civil infrastructural applications. Indeed, in many cases the bonded joint capacity is often limited by the strength of the adherends, either from yielding or through-thickness failure, e.g. delamination. The mixed-adhesive technique has been proposed as a means of tailoring the bondline stiffness (typically by placing at least two adhesives with contrasting stiffness in the bondline) to improve the joint capacity, i.e. by reducing the stress concentrations that are invariably located at the ends of the bonded overlap. Various analytical and numerical scientific approaches are discussed with an aim to establishing key parameters of mixed-adhesive joint design including experimental validation, which in some cases has demonstrated over 75% improvements in static joint strength.