Rivet and Riveted Joints, Applications, Advantages, Disadvantages

By | October 27, 2018

What is a Rivet?

A rivet has a cylindrical shank with a head at one end. It is used to make permanent joints between two plates. Rivet is inserted into the holes of plates (which are to be joined) and then its protruding part is upset by a hammer.

Joints made by rivets are called permanent because the parts can be only be dismantled by damaging rivets. It is Unlike the joints made by nut and bolts.

rivet types

Types of Rivet heads

  1. Snap head rivet
  2. Pan head rivet
  3. Countersunk head rivet
  4. Flat head rivet
  5. Half countersunk head rivet

Types of rivet Joints

  1. Butt Joint
  2. Lap joint

Also read:

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Methods of making holes for riveted joints

Holes can be made in the plates either by punching or by drilling. However, there are some differences between them

Basis of comparison Punching Drilling
Cost of hole Cheaper Costly
Accuracy of hole Less More
Plate injury in the vicinity of hole Yes No
Plate thickness up to 25 mm no limit

Methods of riveting

Methods classification type 1:

  1. Hand riveting
  2. Machine riveting

Hand riveting is done by a man with the help of a hammer while Machine riveting is done with the help of a machine.

Methods classification type 2:

  1. Hot riveting
  2. Cold riveting

Differences in hot and cold riveting

Basis of comparison Hot riveting Cold riveting
Temperature above 1000 degree Celsius not applicable
Friction to plate sliding yes no
Type of stress on shank tensile shear
Diameter of rivet above 10 mm below 10 mm

Applications of riveted joints

  • It is used where we have to avoid after thermal effects, as in case of welding
  • Used for metals which have poor weldability
  • Used for heterogeneous materials like asbestos friction lining and steel
  • As welded joints have poor vibration damping capabilities so where required rivets are used in place of it
  • Used for aircraft structure where Aluminium is used

Advantages of Riveted Joints

Here are the advantages of Riveted joints when compared to welded joints

  • It is more reliable
  • It can also be used for non ferrous metals
  • Parts assembled by Riveted joint do not have any thermal after effects
  • Its quality inspection is easy and cheap
  • When parts are dismantled riveted parts have less damage compared to welded partsĀ 

Disadvantages of Riveted joints

Here are the disadvantages of Riveted joints when compared to welded joints

  • Due to holes plates become weak
  • Labor cost is more
  • Overall cost of riveted joints is more
  • They have more weight than welded joints
  • Riveting process creates more noise
  • Stress concentration near holes

Types of failures in Riveted Joints

  • Shear failure
  • Tensile failure of plates
  • Crushing failure of plates
  • Shear failure of plates in margin area
  • Tearing of plate in margin area

Image source: Wikipedia