Calculate welding strength?

[projektshare]

Hi Guys

I need some help to calculate the welding strength on the product that I have made. How do I calculate it without using Inventor etc. ?

Picture 1:

a:150 mm
b: 68 mm

Picture 2:

a: 90 mm
b: 48 mm

[Kelly_Bramble]

Search the internet for "Inventor and weld strength analysis".

I got 1,690,000 results including many videos.

[Kelly_Bramble]

It might be easier to first determine the actual loading on the frame...

Using
2D Statics Modeler and and Calculator

then, calculate the stress on the weld.

Weld Design and Stress Calculators

[projektshare]

Thanks for your reply

I dont want to use Inventor. I need to calculate it by my self, but there is very different ways to do that. However I am not sure which way to use?

[projektshare]

The maximum load including the frame is 300 kg

[Hudson]

I was taught that one fairly conservative way to estimate weld strength is to consider the load as a shear load and hence use the shear strength of the material, instead of the tensile properties, and the smallest cross section of the weld.

I do not know of a really great way to determine weld strength given all the variables in the process.

[jboggs]

Bottom line for me after witnessing several failures over the years (one of which crushed a fork truck driver and another could have led to multiple fatalities) - on any critical application I avoid designing welds to be in tension at all costs. For example, the upper surface of a loaded horizontal cantilever beam connection is in tension. The lower surface is in compression. I try to design critical welded joints so that the failure mode is a shearing or sliding action of the components rather than direct separation.