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Plotting stress-strain graph from simulation

Hi everyone, I am studying an example in Abaqus example problems manual (version 6.10) called "uniaxial rachetting under tension and compression". In the example there is a graph plotting axial stress-strain relationship for experiment data and simulation data. By studying the inp file I knows that the writer has ask for some outputs like RF1, RF2, RF3, S, ALPHA, ALPHAN, LE and so on in certain node and element set. However, I still can't figure out how writer use the output data from simulation to plot the axial stress-strain graph.


Tauno Otto's picture

Professorship in Mechatronics Instrumentation

Tallinn University of Technology
announces the competition for the following professorial position within
Activity 2 of the Doctoral Studies and Internationalisation Programme DoRa:


Tauno Otto's picture

Professorship in Robot Welding

Tallinn University of Technology
(TUT) announces the competition for the following professorial position supported by EU within
Activity 2 of the Doctoral Studies and Internationalisation Programme DoRa:

Professor of Robot Welding at the Faculty of Mechanical Engineering, TUT

Period: 01/09/2011-31/08/2014

Deadline for applications:  May
31th, 2011


Zhigang Suo's picture

Thermodynamics 0, 1, 2, 3

In teaching the elements of thermodynamics in the graduate course on soft active materials, I have followed this sequence:

  • Isolated system:  a system capable of no variation. Entropy, S.
  • Temperature: a system capable of one independent variation. Entropy is a function of energy, S(U).
  • Pressure:  a system capable of two independent variations. Entropy is a function of energy and volume, S(U,V).
  • Chemical potential: a system capable of three independent variations. Entropy is a function of energy, volume and the number of water molecules, S(U,V,N).

S. Beretta's picture

Damage tolerance of railway axles

Failure of railway axles has been the problem which gave origin to the studies about 'fatigue'. The modern approach to the structural integrity of these safety components is to complement the traditional designwith a 'damage toleranc' analysis.

A Special Issue just appeared onto Eng. Fracture Mechanics presents some of the most recent research.


Chen Long's picture

how is the stress-strain field near the crack tip under cyclic loading?

hi!

i am interested in the fatigue crack growth of a cracked body.Recently,i am stucked by a problem of how is the stree-strain relationship near the crack tip  under cyclic loading.As we know,the HRR field near a crack tip under monotanic loading is well solved.So,i doublt that if the type of the HRR formulation can still be used under cyclic loading.If not,why?And how to solve this problem?if there is any suggestions or references ,i would be appreciated!


Zhigang Suo's picture

Temperature vs. chemical potential

For the third time I am teaching the graduate course on soft active materials.  This course is called Advanced Elasticity in the Catalog of Courses.  In the last several years, I have dropped several traditional topics, and focused on thermodynamics and finite deformation.  I have added several topics where both thermodynamics and finite deformation play significant roles, such as elastomeric gels and dielectric elastomers.


Fliiping nodes normal directions for a solid section

Does Anyhone have any idea about fliping the normal directions for a solid sections to be pointed in not out, because am having an error: nodes have incorrect normal definitions.


NANOVEA's picture

Cyclical Nanoindentation Stress-Strain Measurement

The Stress-Strain curve obtained by Nanoindentation reveals the correlation of "Stress" and"Strain" of a given material under nano controlled loads. Unlike the traditional Tensile Testing method of obtaining Stress-Strain curve data, which gives data at a macro level, the Nanoindentation method provides vital Stress-Strain curve data at nano level scale without the large and intense machinery. The Stress-Strain curve of various materials will vary widely. Ultimately, the Stress-Strain curve provides crucial information on the threshold between elastic and plastic-elastic behavior zone as the sample is subject to increasing loads.


Amit Acharya's picture

On the three-dimensional Filon construct for dislocations

 
(to appear in the Intl. Journal of Engineering Science)

 Robin J. Knops and Amit Acharya

 The relationship between dislocation theory and the difference of linear elastic solutions for two different sets of elastic moduli, derived by Filon in two-dimensions, is generalised to three-dimensions. Essential features are developed and illustrated by the  examples of the edge and screw dislocations. The inhomogeneity  problem is  discussed within the same context and related to Somigliana dislocations, and  in the limit  to the interstitial atom.


Delamination and Cohesive zone model

 

I want to work on delamination and cohesive zone model. I would also like to model this in Abaqus. I’ve read the material available there but it’s not adequate. I would like to know the concepts and fundamentals of the cohesive zone model and its implementation. Can anyone explain this? Please suggest some good literature/books on this for beginners.

Praveen.

 


Chaofeng Lu's picture

Advanced Courses on Mechanics of Soft Matter, Zhejiang University, Dec 21-27, 2011

NSFC Advanced Courses on Mechanics of Soft Matter 2011
(Zhejiang University, Dec 21-27, 2011)


ABAQUS Fully-coupled Thermal Analysis / ABAQUS Explicit

 

Hi everyone,

 

I am new to ABAQUS. I am working on a research topic where I need to study the temperature increase arised due to strains applied to a body. From the user's manual I understood that I need to use "Sequentially Coupled Thermal-Stress Analysis" for my model.

I want to define two sample bodies one of which to be the under the effect of strains. After that I want to define a bond betwwen the two bodies and see the temperature increase in the body which is not under the effect of strains. I must accomplish this by using ABAQUS / Explicit.

Can anyone please help me in this regard?

Thanks in advance


Crack Initiation with UMAT

Dear all,

      I want to model crack initiation and propagation for a user defined material, using Abaqus. When I try to model , I get the following error:

A MATERIAL PROPERTY THAT IS NOT ALLOWED WITH A USER MATERIAL HAS BEEN SPECIFIED

when I take out critical damage initiation, the model works fine; which means that it doesnt allow me to couple UMAT with crack initiation. Does anyone know how to handle this problem?

All the best,

         Panos

 


firozahmed49's picture

how to apply a torsional moment to shell made up of composite in ANSYS

HI,
I am performing a non linear buckling analysis in ansys using shell 181 element. My geometry is made up of composite material and has a shell structure. The shell is subjected to torsion at one end so as to buckle throughout it length. the other end is fully constraint.
My problem is how to apply this torsional moment at the free end.
anybody please help me.


ICoBT 2011 - Call for paper reminder - deadline 15 April 2011

Original research papers, for oral or poster presentation, are invited for the following areas:


Modelling of reinforced concrete beams by ANSYS (Question)

Hi;

 

I am looking for a way to model a reinforced beam by ANSYS.

Is it possible to model the bars and the concrete part seperately and then glue them together.

What is the routine way to do this?

Is there any tutorial available?

 

Thanks;

Media


Postdoc or summer school knowledge

Hi, I finished my PhD and I am looking for a summer school or a language school in English. And also I want to improve my Meshfree knowledge and programming knowledge. My education is funded by government ( or my university). How can I find a school or university? And what is the procedure for acceptance? 


Stress Field near a crack tip with different crack fibre orientations of an orthotropic lamina

I was going through these papers:

1.P.K. Sarkar and S.K. Maiti, 'Prediction of mode-1 fracture toughness of unidirectional fibre composites with arbitrary crack fibre orientation from its lowest or matrix fracture toughness'. int. J. Fracture, vol. 40. pp. R91-R96, (1989).

 

2.S.K. Maiti and P.K. Sarkar, 'A method of calculation of total strain energy release rate and its layer-wise distribution for an arbitrary through the thickness crack extension in a composite laminate', Engg. Fracture Mechanics, vol. 36, pp. 639-646,(1990).

 

 


why ductile material fail by irregular transgranular fracture

why does ductile material fail by transgranularcracking


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