In an ideal world structures with multimaterials and complex geometries are made as a single piece at the push of a button. However, for various reasons, structures are manufactured through assembly of components using various joining processes. Although there are emerging technologies like 3D printing and additive manufacturing offering monolithic construction, various types of joints remain indespensible and integral parts of structures.

Table 1: Examples of structure parts and joints


parts / joints

Toyota Car
30 thousand parts
Airbus A380
4 million parts
Eiffel Tower
18 thousand metal parts; 2.5 million rivets 
Human Skeleton
206 bones; joint types - ball and socket,  ellipsoidal, hinge, pivot


Materials joining is one of the most important yet least understood processes due to its inherent multidisciplinary nature. Efficient joints are vital prerequisites for the integrity of multi-component material systems and structures. Accordingly, this website will endeavour to provide one of the most comprehensive source of information on materials joining technology with a balanced scientific and practical approach. The content will be valuable to anyone interested in learning about joining technology, and in particular will benefit professionals, researchers and academics working in this field.

In general, the Joining methods are broadly grouped into following categories

  • Adhesive Bonding and Sealing
  • Welding, Soldering and Brazing
  • Mechanical fastening

Moreover, there are hybrid joining systems involving combination of two or more of the above methods, e.g. weld-bonding, rivet-bonding.

This website covers a broad spectrum of areas related to materials joining  including, but not limited to, the following:

  • Manufacturing – Building, construction, automotive, transportation, aerospace, etc
  • Repair and strengthening – Rehabilitation of structures
  • Composite materials - Honeycomb sandwich structures and multi-material systems; fibre-matrix and filler-matrix interface/interphase optimisation in composite materials
  • Nature-inspired adhesives – Synthetic and biomimetic adhesives; dry adhesives based on the Gecko feet; waterproof adhesives based on the chemistry of mussel adhesives
  • Dentistry – Restoration and aesthetic areas
  • Medicine and surgery – materials, components and joining processes

About the founder of this website

Dr Hamid Rahimi has over 30 years of research and teaching experience in areas of joining technology and polymer composite materials, having studied at the Brunel and Oxford Brookes universities in United Kingdom. He has published research papers on adhesive bonding technology and polymer composite materials. He also offers independent consultancy, giving advice on various aspects of joining technology.

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