Hi,

I am using userdefined material model UMAT for modelling of hypoplastice constitutive model in abaqus.

I need to run dynamic analysis, so how can convert UMAT to VUMAT (fortran) subroutine.

Please tell me the procedure to convert UMAT to VUMAT, it will be of great help.

Thanking You.

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Hi,

 I am modelling a prestressed RC beam with abaqus. For the beam I am using the C3D8 element and for the reinforcement and strands the BEAM element and I am using the EMBEDDED command to simulate the contact between the steel and the concrete.

I am trying to simulate the prestressed with the prestressed hold command, but I am not having success because I am not writting the correctly code.

Can someone help me and tell me how I can do this correctly? What should I write? Where can I see that?

 Best regards,

Sara

Hi everyone:

Now i am doing a dynamic analysis of a sandwich structure in ABAQUS
,which is consist of viscoelastic (ER) material and elastic ones. I want to
input viscoelastic material parameters by means of Frequency=formula.But
I have only formula of shear modulus(including storage modulus and
loss modulus expressed in frequency domain) about the material
,Real(G)=G',Loss
factor=G'',(G=G'+iG'').So how can i
get the paraments required by Frequency=Formula? Thank you and waiting
for your answer!

I'm currently working on modeling 3 phases composites material. However, I'm having hard time on finding the transverse modulus as it's different from analytical results. I've been using Mori-Tanaka approach to determine the stiffness moduli. Does anyone know how to obtain a correct values for the transverse moduli? 

Hi,

I modeled a beam with a hole in ABAQUS in 2D and now I would like to stick one plate to the beam surface.

I can do it easily in 3D but actually I do not like to jump 3D because It will make analyses very hard to follow.

My question is that, Is there anyway to stick a the plate to beam in 2D in ABAQUS and avoid 3D?

Thank you,

Parisa

Hi