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Science of Mixed-Adhesive Joints

  • James G Broughton
  • Michael D Fitton
Chapter
Part of the Advanced Structured Materials book series (STRUCTMAT, volume 6)

Abstract

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.

Keywords

Bonded joints Graded modulus adhesives Mixed-adhesive joints Stress concentrations Joint strength Predictive models 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.Joining Technology Research Centre, School of TechnologyOxford Brookes UniversityWheatleyUK
  2. 2.Science & Technology Facilities Council, Rutherford Appleton LaboratoryHarwell Science and Innovation CampusDidcotUK

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