Welding is one type of permanent joining process by which two or more solid components can be joined to form a unit. There exist many other joining processes including few permanent joining processes and many temporary joining processes. Other than welding, rivet joint and adhesive joint are also permanent joining processes. Among temporary joining processes, fasteners, cotter joint, knuckle joints, etc. are commonly used.

 

 

Advantages

  • Transfer of forces between elements more direct.
  • Requires little additional elements like gussets.
  • Shorter length of joints.
  • No reduction in member strength due to bolt holes etc.
  • Rigid connections easy to achieve.

Disadvantages

  • Requires skilled manpower.
  • Requires special equipment.
  • Not easy to achieve at difficult locations less ductile.
  • Prone to defects & fatigue cracks under cyclic loading.

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