Proving perimeter shear

[STH]

Is there a way or standard or a calculation to prove perimeter shear strength?

- 1 inch punch test ?

cheers

[STH]

Is there a way or standard or a calculation to prove perimeter shear strength?

- 1 inch punch test ?

cheers

[oz_olly]

I'd be interested to know how the panel is supposed to be supported for this test. If the test was the same as using a hole punch for sheet metal i.e. one inch punch on the top skin with the bottom supported on a base with a one inch hole. Or is the panel supposed to be supported across 500mm like the 3 point bending test?

If it is the former then it is pretty easy to calculate the sheer strength.

Has anyone sought clarification from the rules committee on this?

Cheers

[Ashik]

Hello.

I'm new here, and wasn't quite sure if I should start a new post or not, but after searching for keywords I guess this post is probably the closest to my question.

I wish to conduct an-1-inch shear punch test on Aluminium Honeycomb Panel to find out if it can withstand forces up to 7.5kN (for rule # B3.31.3). Now I'm only quite not sure about the speed at which the punch has to come down onto the panel. Is there any equation, or sources that I can look into to calculate the required shear speed of the punch? Or is there a standard speed for such tests? Does anyone know?

Thanks

[Jon Burford]

We have tested hexcell at a number of punch speeds with a 1" bar and the speed makes little to no difference to the results as far as I am concerned.

[Ashik]

Thanks Jon. I guess I will do the same then, test it with a few different speeds, and hopefully I'll get similar results. By the way, off the top of your head, any idea on what was your lowest/highest speed?

[Jon Burford]

Don't remember sorry. I can check the data tomorrow and let you know if that helps.


Jon

[Ashik]

If you can please, that'd be great! http://fsae.com/groupee_common/emoticons/icon_smile.gif
Thanks again!