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hardening

ABAQUS - the influence of changing kinematic and cycling hardening parameters

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Hello,

 

I have recently done a simple hourglass model to check the influence of hardening parameters in Abaqus. The reason was the effects of the parameters' change in bigger models were a bit surprising, therefore I needed to investigate the reason using some simpler model. Please see file 1.

 

After performing tension/compression cycles I got results as shown in files 2, 3, 4 and 5. Please note that only the hardening parameter in the description changes, the other three stays the same for each series.

 

Antonino Favata's picture

Graphene is softer to bend when stretched and bent and harder to stretch when bent and moderately stretched

 

In the attached paper, we have shown that concomitant bending and stretching, whatever their value, concur to make bending stiffness decrease; moreover, concomitant bending and stretching make the stretching stiffness (or the Young modulus) increase until the applied forces reach a threshold value, then they make it decrease. Said differently, graphene is softer to bend when stretched and bent and harder to stretch when bent and moderately stretched.

 

R.Mehrabi's picture

Experimental Study of NiTi Thin-Walled Tubes Under Uniaxial Tension, Torsion, Proportional and Non-Proportional Loadings

The superelastic response of NiTi shape memory alloys under various loading conditions is experimentally investigated using thin-walled tube specimens. The isotropic relation between the elastic and shear moduli of austenite and martensite as well as the von Mises stress and strain equivalency are also studied in uniaxial tension and pure torsion. In addition to proportional loading, several non-proportional loading experiments based on both force and displacement control modes are conducted.

Combined hardening parameters

Hi everyone
I am trying to use Abaqus with combined hardening (kinematic + isotropic ) material. Structural milled steel strain-stress curve was obtained through tensile coupon test (ASTM E8).
Please let me know how I can extract material property (C , ɣ , Q and b ) for property input?
It is my first approach to martial plasticity so any detailed explanations or examples would be appreciated.
Regards
Farzad

obtaining stress-strain curve parameters

Dear All,

In one of my elastic-plastic simulations, I have used the Combined hardening model with half-cycle to model its plastic behaviour. So, I've fed in a list of values from experimental data. Now, I understand that ABAQUS uses certain parameters to generate the stress-strain curve from the data that I've provided.

Is it possible to find out these parameters used by ABAQUS?

Thanks in anticipation,

Aneesh

Implementation of Isotropic, Kinematic & Combined Hardening laws in Ansys 11.0

Hi Everyone,


I'm analysing the Edge waviness which is caused in the sheet metal when it is undergoing the electrolytic coating process (zinc galvanising plant). i.e. there is waviness (shakes) in one edge side of the sheet metal.

Ask for a constitutive model for soil with dilantancy and hardening

Dear researchers,

My name is Chi and I just started my PhD study two months ago. I am experimentally and numerically studying the pore pressure build-up in sands during the pile load test and hence, at the first stage, I need to have a constitutive model for soil with both dilatancy and hardening behaviors.

Henry Tan's picture

Experiment 4: Precipitation Hardening of Aluminum Alloys

The strength and hardness of some metal alloys may be enhanced by the formation of extremely small
uniformly dispersed particles of a second phase within the original phase matrix; this must be accomplished
by appropriate heat treatment.

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