Strength of spot welding, Mechanical Engineering

Assignment Help:

Strength of spot welding

Because spot welding has generally replaced riveting in many applications, it is reasonable to compare these two processes for strength. Often, riveted joints are designed on the basis d = 1.2 t, where 'd' is the rivet diameter and 't' is the sheet thickness. In a riveted joint, the holes for the plate weakens the plate. With a spot welded joint, the weld is integral with the plate so that the only weakening occurring is that due to the softening effect of the welding heat. Higher efficiencies can therefore be achieved in welding. Since, weld diameter is so closely related to electrode tip diameter, the later maybe quoted for spot welding and the electrode diameter d is made equal to t. d2 = (0.1 + 2t) is another empirical formula used in the case of plates which are not very thick or thin. It is important to recognise when considering the strength of a spot weld that in a sheet metal the weld is rarely, if ever, stressed solely in shear because of distortion which take place around the weld under load. Under these conditions, the ductility of the parent metal at the periphery of the metal can have a dominating influence. A useful indication of weld ductility is obtained by taking the ratio of cross-section strength (ft) and shear strength(fs). This ductility ratio ft/fs approaches 1 for maximum ductility and approaches '0' where extreme brittleness is present.


Related Discussions:- Strength of spot welding

State the types of foundations, State the types of foundations We saw ...

State the types of foundations We saw the different types of foundations commonly adopted for specific situation. In actual practice the situations are not very simple both in

Parts of wilson hartnell governor, what are the parts of wilson hartnell go...

what are the parts of wilson hartnell governor with their designation?

Design evacuation systems for plant, Q. Design evacuation systems for plant...

Q. Design evacuation systems for plant? The plant will have designated Muster areas where personnel can go during an emergency and be accounted for and from which they can then

Titanium alloys, Titanium Alloys Pure titanium is a light weight and s...

Titanium Alloys Pure titanium is a light weight and strong ductile metal. This is very strong and as well as highly resistant to corrosion of all kinds but has the drawback su

Resistance spot welding, Resistance Spot Welding In this process, a spo...

Resistance Spot Welding In this process, a spot of weld is made between overlapping sheets by means of two cylindrical copper alloy electrodes, one on top and the other at the

Corrosion resistance of tantalum, Q. Corrosion resistance of tantalum? ...

Q. Corrosion resistance of tantalum? Tantalum is readily attacked by strong alkalis, even at room temperature, and therefore, is not suitable for use in processes where the pH

Calculate change of entropy of universe, Calculate change of entropy of uni...

Calculate change of entropy of universe: 5Kg of ice at 10 0 C is kept in atmosphere that is at 30 0 C. Calculate change of entropy of universe when it melts and comes i

Determine steady state error, Derive mathematical equation for the time res...

Derive mathematical equation for the time response of a first order system subjected to ramp input. Draw the response curve and determine steady state error. Give some examples of

Evaluate the angular velocity, In a 4-Bar process the following data is giv...

In a 4-Bar process the following data is given :- Length of crank (AB) = 300 mm, Length of link AD = 600 mm, Length of links BC = CD = 360 mm, Angle BAD ie ∠BAD = 60o ,

Teory of machine, When doescortiles componant of acceleration occurs

When doescortiles componant of acceleration occurs

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd