MIL-HDBK-5H Specimen Size 2

[Grindhouse]

Hello,
I am trying to extract the percentage of elongation to put into Abaqus for a simulation of plastic failure.
Now I have found a good site (see below) which allows me to extract accurate values from the graphs within MIL-HDBK-5H however this graph plots (Stress vs Strain (in./in.)).

http://ww0.knovel.com/knovel2/Show_Graph_Flash.jsp?SetID=4813230&BookID=754&Datatype=6false

However, this strain value is useless without having the original specimen/sample size to give the percentages I require.

Now I've trawled through the MIL spec and for the life of me I can't find where is says the test sizes for 'Sheet' aluminium.

Can anyone shed any light on where I would find this sample size data as so far this sheet could be 2'x2' or 8'x8'?


Appreciate any assistance,
Regards,
Rob

 

[TVP]

Grindhouse,

From MIL-HDBK-5H:

1.4.3.5 Elongation and Reduction of Area — Elongation and reduction of area are measured in accordance with specification ASTM E 8.

1.4.4.6 Elongation (e) — An additional property that is determined from the tensile test is elongation, which is a measure of ductility. Elongation is the increase in gage length, measured after fracture of the tensile specimen within the gage length, expressed as a percentage of the original gage length. Elongation is usually measured in 2 inches for rectangular tensile specimens and in 4D for round specimens, except welded specimens. See applicable material specification for specified gage length.

 

[Grindhouse]

Hi TVP,
Thanks for that, so the original gage length is 2 inches?

Seems rather small for a test specimen or is it me?

Thanks for your help, eyesight is not what it was thats for sure!

 

[TVP]

2 inch (50 mm) gage length is one of the standards used around the world. The following consensus standards all reference a 2 inch or 50 mm gage length:

ASTM A370
ASTM E8/E8M
EN 10002 (AFNOR, BSI, DIN, UNI, etc.)
ISO 6892
JIS Z2241

 

[Grindhouse]

Thank you Sir, most helpful.

 

[TVP]

Glad to be of assistance.