A-286 STRESS-STRAIN CURVE

[StressMan2506]

Can anyone out there supply me the above info, or points from which the Ramberg-Osgood equation can be formulated?

I cannot find what I need in any of the handbooks to which I have access.

Thanks in anticipation.

 

[Neubaten]

From "Aerospace Struc. Met. Handbook", tensile and compression stress-strain curves for A-286 sheet.

 

[Neubaten]

Compression

 

[Neubaten]

Probably, you'll already have this one, but here it is the properties table from MIL-HDBK-5

 

[rb1957]

where you looking for the curves, or the points to pick from them ? Bruhn (fig B1.12) shows the method very clearly ... draw lines at 70% and 85% E. these intersect the stress/strain curve at f.7 and f.85 respectively. then you normalise stress with f.7 and get ...

E*strain/f.7 = (stress/f.7) + (3/7)*(stress/f.7)^n

n = 1+ln(17/7)/ln(f.7/f.85)

 

[rb1957]

Bruhn has some Ramberg data for A286 ...
ftu = 140ksi, fcy = 95ksi, E = 29E6psi, n = 15, f.7 = 93ksi

 

[StressMan2506]

Thanks, guys. I have Bruhn and, rb1957, I have found the values you quote.