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selecting suface nodes in orphan mesh by python script????

Submitted by wangyl on
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Hi,

    I have a 3D orphan mesh in abaqus and I need to select a group of nodes that belong to the orphan mesh and that would have been on a 3D surface of the parent solid before it was orphaned.

Use Vumat to simulate the hot ductile fracture criterion of Freudenthal

Submitted by hongfengtl on
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Dear everybody,
I have just studied Abaqus and would like to use Vumat to simulate the hot ductile

fracture criterion of Freudenthal which have the equation: D=integral(0-fracture strain)

of (Smises stress)*d(strain). The fracture will be appear when I reach 1 unit.
Could you please show me how to write algorithm adding temperature to calculate (D) and

out put (D) in Vumat.

thanks you so much

I am looking forward to hearing from you

hongfengtl

ABAQUS question- geometric non linear solution

Submitted by kajalschopra on

In a geometric non linear solution, the algorithm separates the rigid body motion from the total motion of the element.

In ABAQUS-I beliwve one can output the rigid body component of the motion following the geometric non linear analysis. Can anyoen advise what is the card required to output the rigid body component of motion please?

 

material model for simulation of glass machining

Submitted by farzad pashmforoush on

Hello every body

I am working on the simulation of micromachining of “glass” in abaqus.

Although the glass is brittle, it shows some plasticity in micromachining

because of the high hydrostatic pressure field present in the machining region.

Now I am looking for an appropriate material model for glass with

elasto-plastic behavior which allows element deletion. I am not sure if "johnson-Holmquist damage model" is suitable for machining simualtion or not? I would be very thankful

if anyone would please help me.

With best regards

Anisotropic plasticity and hyperelasticity in Abaqus

Submitted by Richard.Pauck on
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I am trying to model a polymer that has been processed in such a way that it has oriented (orthotropic) material properties and undergoes very high strains (>100%) before break.