fillet weld strength calculation example for welded connection subjected to bending
DESCRIPTION
Fillet Weld Strength Calculation Example for Welded Connection Subjected to BendingTRANSCRIPT
MechGuru
Resources for Practicing Engineers
Home
Engineering design
Manufacturing Engineering
Fluid Engineering
Engineering Calculator
Material Engineering
How it Works
Thermal Engineering
Engineering Math
Engineering Softwares
Vehicle Design
Applied Math
« Fillet Weld Size Calculation Equations for Welding Joint Subjected to Bending Moment
Welding Joint Design Calculation Example for Fillet weld in Torsion in 10 Steps »
Print this Post
Weld Strength Calculation Example for
Bending Moment Application
The basic methodology and the required equations for fillet weld size calculation is discussed in the
previous article . It will be great if you go through the article before attempting to understand the
welding joint design calculation example here.
Book Hotels In Ranikhetwww.cleartrip.com/Ranikhet-Hotels
Use Coupon Code "CTHTLSEM" & Save Upto 50% On Your Bookings. Hurry!
Fillet Weld Strength Calculation Example for Welded Connection Subjecte... http://blog.mechguru.com/free-caculator/weld-strength-calculation-exampl...
1 of 6 11/9/2013 12:07 PM
here to find out the required welding size:
Weld Strength Calculation Example in Bending
F= applied load = 20000 N
D = Diameter of tube = 200 mm
X = Distance = 100mm
Unit throat length area (Au) of the welded joint is calculated from the eq.1 as below:1.
Au=3.14*D=3.14*200=628 sq.mm
Design strength (Pw) is calculated from the eq.2 as:
Pw=0.5*fu=0.5*430 = 215 N/sq. Mm
2.
Where,
fu is the ultimate tensile stress of the parent material.
Assuming the parent material as S275 which has ultimate stress value (fu) 430 N/sq.mm.
Unit area moment of inertia (Iu) for the circular welded area around the tube can be
calculated as
Iu=3.14*(D/2)*(D/2)*(D/2)=3.14*200*200*200/8=3140000 mm4
3.
Fillet Weld Strength Calculation Example for Welded Connection Subjecte... http://blog.mechguru.com/free-caculator/weld-strength-calculation-exampl...
2 of 6 11/9/2013 12:07 PM
Where,
3.14 is the value of PI.
Direct shear stress (τs) for the fillet welded connection is calculated from the eq.3 as:
τs=F/Au=20000/628=31.87 N/sq.mm
4.
Shear stress due to bending ( τb) is calculated from the eq.4 as:5.
τb=M*Y/Iu=F*X*0.5*D/Iu= 20000*100*0.5*200/3140000 = 63.69 N/sq.mm
Where,
M is the bending moment for the applied force
Y is the distance between the X-X axis and the extreme fibre of the welded cross section, it is
radius for the circular cross section.
Resultant stress (τ) can be found out after weld stress analysis calculation by using the
eq.5 as:
6.
Fillet Weld Strength Calculation Example for Welded Connection Subjecte... http://blog.mechguru.com/free-caculator/weld-strength-calculation-exampl...
3 of 6 11/9/2013 12:07 PM
Weld throat size (t) to be calculated using the eq.6 like:7.
t= τ / Pw=71.17 / 215= 0.331 mm
Weld leg length (L) need to be find out using the eq.7 as:8.
L=1.414*t = 1.414*0.331 = 0.468 mm
So, from the fillet weld size calculation example we found that the required minimum weld
leg length to withstand the weld force is to be 0.468 mm, we will take the 3mm as the weld
size for this example problem.
About the author
Suvo
Fillet Weld Size
Calculation Equations
for Welding Joint
Subjected to Bending
Moment
Determining the
Moment of Inertia
Equation for
Rectrangular Fillet
Weld
Autmobile Propeller
Shaft Design
Calculation- Part1
You may also like:
Book Hotels In Ranikhetwww.cleartrip.com/Ranikhet-Hotels
Use Coupon Code "CTHTLSEM" & Save Upto 50% On Your Bookings. Hurry!
Fillet Weld Strength Calculation Example for Welded Connection Subjecte... http://blog.mechguru.com/free-caculator/weld-strength-calculation-exampl...
4 of 6 11/9/2013 12:07 PM
Suvo is a production engineer by profession and writer/blogger by passion. Apart from
maintaining this blog, he also get some freelance work like: Mechanical design, CAD, CAE,
Assignment report writing, Website design. Read More>>
4 comments
Screw or Bolt Thread
Engagement Length Calculation
•
Avatar — how to calculate tensile
stress area
Tractive Force Calculation for a
Vehicle
•
Avatar — where did
you studied
Best Community ⚙ ⤤Share
• •
cindy •
you are a genius
1
• •
td •
Should the first equation to be r 2 instead of D?
• •
Georgie •
The units do not work out.... t= tau/Pw = (N/ Sq mm) / (N/Sq mm) =
unitless and not length. There are other issues as well, but I would revisit
your analysis if I were you.
Nice try though.
• •
MechGuru • Mod
Thanks for your comment.
Please see the previous article:
http://blog.mechguru.com/machi...
You will find that the "tau" and "Pw" is calulated based on unit throat
sie in mm and hence by dividing "tau / Pw" you will get the throat
size in mm.
It will be great if you tell what are the other issues, i can try to
correct it.
0★
Avatar
Avatar
Avatar
Avatar
Fillet Weld Strength Calculation Example for Welded Connection Subjecte... http://blog.mechguru.com/free-caculator/weld-strength-calculation-exampl...
5 of 6 11/9/2013 12:07 PM
Our Services
Advertise with Us
Get Engineering Assignment Help
Subscribe
To get the latest post directly to your email box, Enter your email address:
Recent Posts
Applied Mathematical Modeling of SISO Physical Mechanical System – Part1
–Developing System Equations
Working of Power Brake Vacuum Booster Simplified
Vehicle Stopping Distance Calculation Equations and Example
Tractive Force Calculation for a Vehicle
Tire Rolling Circumference Calculation Example
Copyright
© 2013 MechGuru.
Return to top
Powered by WordPress and the Graphene Theme.
Copyright Notice | Disclaimer | Privacy policy | Forum
Follow us:
► Pipe Welding
► Welding Welding
► Load Calculation
Fillet Weld Strength Calculation Example for Welded Connection Subjecte... http://blog.mechguru.com/free-caculator/weld-strength-calculation-exampl...
6 of 6 11/9/2013 12:07 PM