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bspooh
12-23-2003, 08:12 PM
Hello everyone,

I don't know if this was brought up before. But I need to know if there is a website out there that will tell you different shear strengths of materials...

What i need to know is what is the shear strength of 1" dia. rebar?

I tried "googling" but no luck..any help would be appreciated..

thanks,
brent

nheng
12-23-2003, 08:34 PM
You can try www.efunda.com (http://www.efunda.com) and search for shear strength. The result will lead you to an additional 1108 alloys. You can page through them or refine your search.
Den

Evan
12-23-2003, 08:34 PM
www.matweb.com (http://www.matweb.com) has metal properties. Shear strength is specified assuming a one inch cross section so you will have to do the math. However, you will need to know what alloy the rebar is made from. There are lots of different alloys used in rebar including stainless steel and stainless steel clad.

On Matweb the shear strength is given as KSI=1000 PSI



[This message has been edited by Evan (edited 12-23-2003).]

Thrud
12-24-2003, 03:18 AM
Brent

1" round bar has a cross section of .785398sq." In canada reinforcing bar is designated under CSA G30.12-m1977 this fall under the general classification of "mild" or "hot rolled" steel - because of unknown alloying agents its strength can be considerably higher than plain mild steel, but that is the "minimum" suggested yeild strength.

Higher alloys can be employed for specified high strength jobs.

Yeild strength is about 41.5Kpsi so a 1" rebar will give at about 30,000 with no safety margin.


[This message has been edited by Thrud (edited 12-24-2003).]

bspooh
12-24-2003, 11:13 AM
Thanks all for replying..I did a lot of searching last night, and found out that there is not a standard for the composition of rebar...Some sites compared the similarities of rebar to that of A36 steel..

I have a customer that wants a low pressure hydraulic tool to cut 1" rebar..I just wanted to figure out how much "tons" of force would be required to cut it..I have seen some tools to cut 1" rebar, but they vary from 14 tons to 45 tons of force..I think I will just trial and error this request...I currently make a tool that will cut 1/2" rebar without a problem..But 1" is a whole new "beast"..Thats almost as tough as Thruds sisters meatloaf.. http://bbs.homeshopmachinist.net//smile.gif

Thanks all,

brent

Evan
12-24-2003, 03:12 PM
I would figure on at least 40 tons. I don't know how the tool is configured but you can of course take advantage of force multiplication like in bolt cutters.

Thrud
12-25-2003, 05:16 AM
Brent

You and I both know that the bozo's are gonna try to feed it something bigger anyway...

I would try for 60K that should cover your hiney. Perhaps with a compound leverage arangement (toggle link).

[This message has been edited by Thrud (edited 12-25-2003).]