Elongation in mechhanical property
Elongation in mechhanical property
(OP)
Hi
I have a simple question about Elongation in mechanical property.
Is that meam Ultimate Strain for example for A36 is 0.21?
I’m going to use 3-line Stress – strain diagram.
But according to table (attached), by E= 205000 and Yield stress = 250, so yield strain is 0.001219.
But 120 ε is 0.1463, not 0.21.
What is my mistake? What’s the difference between them?
Thanks in advance






RE: Elongation in mechhanical property
RE: Elongation in mechhanical property
I'm not sure, but most of reliable articles used that.(attached pictures)
did I understand the meaning of elongation right or not?
RE: Elongation in mechhanical property
RE: Elongation in mechhanical property
RE: Elongation in mechhanical property
BA
RE: Elongation in mechhanical property
yield = 250MPa, ey = 250/205000 = 0.00122
uts = 474Mpa, eu = 0.10 (approx)
Quando Omni Flunkus Moritati
RE: Elongation in mechhanical property
BA
RE: Elongation in mechhanical property
I anylized the materials in Abaqus, by both ways, but there are too many differrences between the result.
However wich one is better to use: 120 ε and 14.63% or 21% ???
RE: Elongation in mechhanical property
what "one" are you talking about ?
Quando Omni Flunkus Moritati
RE: Elongation in mechhanical property
250 0
251 0.0134146 (11ε)
474 0.146341 (120ε)
it was according the diagram of 3-Line stress - strain.
but because of its differnce till 0.21, i thought it's wrong.
and I didn't find 0.1 that you bid in any refernces.
RE: Elongation in mechhanical property
it could be the strain added onto the elastic strain ...
total strain = elastic strain+plastic strain = stress/E+x
your points look "odd" to me ...
(250,0) ... ok that's the yield point
(251, 0.013) ... boy that's a large change in slope !? considering the yield strain is something like 0.001 !??
you should be able to final the elongation for your material (and heat treat) in your specs.
it looks like you set the yield point (250,0), the failure point (474,0.10-474/205000), and some intermediate point that gives Abaqus a smooth transition.
Quando Omni Flunkus Moritati
RE: Elongation in mechhanical property
I've heared that for defining plastic behavior to Abaqus, you shouldn't have 2 point with same stress, even you have the horizontal line like attached file.
yes, that's large change in slope, because of plastic behavior.
but we can't say: 474/205000, because in hardening region Esh=E/33.
E=205000 is only for Elastic region
Am I right?
RE: Elongation in mechhanical property
check the Abaqus manual and examples.
Quando Omni Flunkus Moritati