Mumbai University > Mechanical Engineering > Sem 3 > Production Process 1

Marks: 5M

Year: May 2016

Advantages

• The adherents are not affected by heat
• Uniform stress distribution
• Possibility to join large surfaces
• Possibility to join different materials
• Possibility to join very thin adherents
• Gas-proof and liquid-tight
• No crevice corrosion
• No contact corrosion
• No precise fits of the adherent surfaces are necessary
• Good damping properties
• High dynamic strength

Disadvantages:

• Limited stability to heat
• Long-term use may alter the properties of the bond-line
• Cleaning and surface preparation of the adherents is necessary in many cases
• Specific production requirements to be met
• Specific clamping devices are often required to fix the joint
• Non destructive quality testing is only possible to a certain extent

Applications:

• Bonding of metal to non-metals especially plastics is the major application of adhesive bonding.
• Used as an alternative to riveting for aircraft structures.
• Widely applicable in fastening of stiffeners to the aircraft skin and in assembling honeycomb structures in aircraft
• Using extensively in the fabrication of aircraft internal structures and providing the smooth surface for supersonic planes.
• Useful in automobile industry for attaching brake lining to shoes, automatic transmission bands, and stiffeners
• Find applications in the fabrication of railway coaches, boats, refrigerators, storage tanks, and microwave reflectors for radar and space communications