# mechanician

## curvature tensor

Could someone explain me what do the curvature tensor mean at surface structures?

THX for the help!

## I want to combine XFEM and UMAT(about concrete) in ABAQUS

DEAR everyone :

I want to  combine XFEM and UMAT(about concrete) in ABAQUS,I have some questions about this ,concrete is a Special materials and I have the Constitutive equation about concrete ;Can I use the new constitutive equation and  simulate mixed CONCRETE cracking by XFEM(UEL_XFEM) in ABAQUS,how to combine UEL and UMAT in abaqus, thanks in advance,or you can Recommend  some relative infomation for me

## Structural analysis of a bullwheel on Ansys

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Hi everybody,

I have some problems with the structural analysis of an drive bullwheel on Ansys.

How can I apply the load on the bullwheel groove

Tangential (constant) and normal components

I was thinking to apply the normal load using a prep>loads>define_loads>apply>FUNCTIONS but I'm not good at this option. Is it necessary to define a particular coordinate system?

## dynamic stiffness definition in abaqus

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I am working on the vibratory simulation of engin cooling system. Now
i want to add the component of rubber isolators , the idea is to add
the spring element ,we have tested the dynamic stiffness during range
of 5-100HZ , i konw that in ANSYS we can use the matrix 27 element to define the dynamic stiffness ,but how can i set the values in abaqus or inp files.

## dynamic stiffness definition in abaqus

I am working on the vibratory simulation of engin cooling system. Now i want to add the component of rubber isolators , the idea is to add the spring element ,we have tested the dynamic stiffness during ranges of 5-100HZ , but how can i put the values in abaqus ou inp files.

## Modeling of Cylindrical shells with variable thickness in ABAQUS

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Hi.

I want to model cylindrical shell that it's thickness varies from top to bottom with this function

h=h0(1-ε cos(θ)) or each arbitrary function that is vary from top to bottom.How can I do this?

Best Regard

## crack simulation in shell3D plate, abaqus

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hi

i wana to investigate effect of crack in lamb wave propagation in composite plate in abaqus software. to this end, i have modeled a composite plate using 3Dshell defomable planar part. Also, i modeled crack using seam tool. i have problem in defining contact between two edges of crack to transmit wave through it. can anybody help me please?

## La resistenza degli ingranaggi

La resistenza degli ingranaggi

## Cuscinetti volventi 2^ parte

Cuscinetti volventi 2^ parte

## Stato di tensione e di deformazione in campo elastico

Stato di tensione e di deformazione in campo elastico

## FEM using Ansys 3D beam - GFRP reinforcing bars

Hey there, I am the newbie in Ansys Modelling, and right now I have to model of 3D RC beam reinforcing by GFRP bars.
Anyone here that can give advice or placing any beneficial link to me to refer.

Thank you so much guys.

Regards

## abaqus incrementation

hi every one

i have problems with abaqus incrementation , now i do fill min,max and initial increment by trial and error , its not efficiency when running time is much,i will be glad if any one can help my and give me overlook of abaqus incrementation.

thanks

## contact damping coefficient

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Hello,

I'm modelling an impact of a rigid body with a deformable plate (shell elements) in the dynamic explicit analysis. When defining contact parameters, I can add the damping coefficient. I'd like to know what value is typical for this parameter? After some computations, I've found that 0,01...0,05 was rather good for my model. Is that a reasonable value?

Thanks

## run scrip in abaqus

hi every body:

mdb.models['Model-1'].parts['Part-1'].SectionAssignment(offset=0.0,

offsetField='', offsetType=MIDDLE_SURFACE, region=Region(

mask=('[#1 ]', ), )), sectionName='Section-3', thicknessAssignment=

FROM_SECTION)

In the up scrip example, how can be define the "mask" for use in getsequencefrommask?