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is it possible to get "yield stress at ambient temperature" AS the "von misses stress at very high temperature"?

Submitted by baleshan on

 

 

 I didn't do any thermal analysis but only doing structural analysis but i am using measured temperature values to my structural model. I created temperature loading with time (Using amplitude method as you mentioned). Plastic perfect material model created with respect with temperature.

 

I used Nonlinear Static Analysis with Linear Perfect plastic materialmodel. (fy=612 at Temperature=20°C)

The yield stress and elastic modulus values wereinput with respect to temperature (Using FIELD)

ABAQUS

Submitted by anjudeepak on
research

Hi.

 I was trying to reproduce the work of Zhuang,Ellis and Yu to get a feel about ABAQUS before starting my actual work...i have already went through the geotech examples given in ABAQUS examples manual.

But i am not able to understand the analysis steps performed in this paper.

Could anyone please help me...

-anju 

 

question about Gurson model

Submitted by Reza_Rastgar on
research
Gurson
void volume fraction
hydrostatic compression

I have a question regarding Gurson model. If we have a cube with initial length of unit and initial porosity of 20 percent and compress it hydrostatically in order to have a huge volume change of cube, the void growth equation in Gurson model takes a negative rate and reduces the void volume fraction to zero first and further compressing leads to no further void volume fraction change (remains zero) and no more plastic straining. Now let's load the model in tensile hydrostatic state up to a stress free configuration; the void volume fraction of the model remains zero.

Position for Research staff member at Leibniz Universität Hannover, Germany

Submitted by Hirschberger on
job
Plasticity
multiscale
dislocations
continuum mechanics
finite elements
crystal

The Graduate School MUSIC ("Multiscale Methods for Interface Coupling") and the

Institute of Continuum Mechanics at Leibniz Universität Hannover invites

applications for a position as a

Research Staff Member in Computational Mechanics

(Salary scale E13 TV-L)

to be appointed on 1 April 2010.

The position is embedded into the Junior Research Group on „Multiscale Modelling of

Materials and Interfaces with Size Effects” and is initially limited to 1 year.

Thermal stresses from pre-defined temperature data (thermography image)

Submitted by Aitor Garcia on
research
Thermal stresses from pre-defined temperature data (thermography image)

I´m facing a problem in which a I´d like to assess stresses due to thermal gradients. I have an IR thermography image (recorded as a matrix) and I like to introduce those temperatures to Abaqus via Matlab.

Is that possible? Or should I use FORTRAN with the UTEMP subroutine?

Thanks in advance,

 

Aitor  

Soil Modeling

Submitted by shivananjegowda137 on
research
SOIL modeling

Hi

Please help in modeling the soil.

I  modelled soil as non linear springs in Abaqus?Standarads and analysed the pipe behavior for hydrodynamic loading.

I am currently planned to model the pipe-soil interaction with soil as an 2D or 3D element along with contact properties. Give me suggestion or methods how can i model soil.Suggested reading materials.I have gone through the abaqus documentation.It tell that soil can be modeled as 2D or 3D.I am really confused which one to use. 

Please give me some steps in creating soil and pipe model .

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