Where and how do I specify the necking effect for steel?

Patricia S · June 7, 2023, 07:16

I am modelling a shear stud group connection in reinforced concrete and would like to specify the necking effect in ANSYS 2021R2 Workbench Technical Data. I am working through the Static Structural Analysis System. Is it possible to use the Damage tool here? It is not clear to me what I have to enter in Damage Initiation Criteria to make it work. *
The head bolts have the following engineering material properties (I know that I have to calculate the true values first):
Yield strength R_p0.2 = 456 MPa
Maximum tensile strength R_m = 519 MPa*
Breaking elongation A = 24 %

evcelica · June 7, 2023, 10:40

I'm not entirely sure what you are asking, but I would make a true stress strain curve, and input in it material properties under "multilinear kinematic hardening". NOTE: In your table of true stress vs true strain, the first point must have 0 plastic strain, this would be your elastic limit. In the analysis, activate non-linear geometry by setting "large deformation" to YES in mechanical under the analysis settings.
That's as far as my knowledge goes, I've never used any damage tools or anything like that.

June 7, 2023, 07:16	Where and how do I specify the necking effect for steel?	#1
Patricia S New Member Patricia S Join Date: Jun 2023 Posts: 2 Rep Power: 0	I am modelling a shear stud group connection in reinforced concrete and would like to specify the necking effect in ANSYS 2021R2 Workbench Technical Data. I am working through the Static Structural Analysis System. Is it possible to use the Damage tool here? It is not clear to me what I have to enter in Damage Initiation Criteria to make it work. * The head bolts have the following engineering material properties (I know that I have to calculate the true values first): Yield strength R_p0.2 = 456 MPa Maximum tensile strength R_m = 519 MPa* Breaking elongation A = 24 %

June 7, 2023, 10:40		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	I'm not entirely sure what you are asking, but I would make a true stress strain curve, and input in it material properties under "multilinear kinematic hardening". NOTE: In your table of true stress vs true strain, the first point must have 0 plastic strain, this would be your elastic limit. In the analysis, activate non-linear geometry by setting "large deformation" to YES in mechanical under the analysis settings. That's as far as my knowledge goes, I've never used any damage tools or anything like that.