stress diagram - deformation

[narra12]

hello to all, someone knows how to display an stress diagram - deformation in ansys workbench? I am doing the analysis of a steel bar subject to a traction force at the end, I would like to see an effort diagram - deformation of the point where the force is applied.
Thank you.

 

[Stan9411]

If you are doing a linear analysis, the diagram you want will be banally an infinite straight, with slope equal to the module of young material you chose .. I don't understand the sense of displaying such a thing ..

 

[narra12]

If you are doing a linear analysis, the diagram you want will be banally an infinite straight, with slope equal to the module of young material you chose .. I don't understand the sense of displaying such a thing ..

Of course I need it because I'm doing a non-linear analysis.

 

[Stan9411]

and then the stress-deformation curve should be a system input and not a result... Otherwise, how does the fem know when it goes through the riot?

In any case, I would set the load and the results of effort and deformation as parameters (to quit the casellein p) , I would throw them in the block that makes data processing (I don’t remember what it is called) and I would update the analysis n times to increasing load .. I take out the tabellina that pulls me out in excel and I do interpolar (but maybe there is already in ansys chart)

 

[narra12]

and then the stress-deformation curve should be a system input and not a result... Otherwise, how does the fem know when it goes through the riot?

In any case, I would set the load and the results of effort and deformation as parameters (to quit the casellein p) , I would throw them in the block that makes data processing (I don’t remember what it is called) and I would update the analysis n times to increasing load .. I take out the tabellina that pulls me out in excel and I do interpolar (but maybe there is already in ansys chart)

I gave the non-linear structural steel that is default on the program, where the yield voltage is present. So I thought that giving a sufficiently large force the program could build me all the chart of the point in question, from the beginning to the breaking point.
Thank you for the answer.

 

[Stan9411]

I don't think you can because basic a fem provides the specific solution for the load conditions you give.

 

[narra12]

I write here the solution because maybe it could be useful to someone. you must first select the point or surface we are interested in making the chart and start the solution (e.g. stess and strain). then you select both solutions and press the button of the chart that is at the top. At this point we will see the chart displayed, and we can decide what to display on the x axis. For both solutions we will see both the maximum and the minimum and we can decide which to exclude and include in the chart. Of course, if I am interested in the chart, even in the plastic phase, I have to give a force that allows me to achieve the yielding of the material.

 

[Cla]

hi, I exhume a discussion a little given but I did not find better about it, the problem I have is similar to your (a little more complicated), I did not understand however how you solved. I have a proof of a composite material that I would like to make the stress deformation curve by applying a shift. problems at the moment (besides using an external extension to the program) are:
1) how do I tell the program to monitor tension and deformation related to one or more specific points? in fact without specifying anything ansys considers maximum/minimum/media voltage and maximum/minimum/media deformation relative to all nodes
2) how do I create a chart for that or those points?

Thank you.

 

[narra12]

Hello, as soon as I have some time I try to answer

 

[meccanicamg]

I work with solidworks and with freecad to make fem. Usually, studies of this type prefer to do them with freecad because I have the nonlinear module to make fem through calculix.
As a rule, if you want to follow a mesh point, you should manually do the required step analysis or move (depending on what allows the fem in use). through the mesh point question you need, you'll have the value of tension. do this for 5-10 steps and revenues values. then put everything in excel and do all the charts, analysis, media etc.
definitely is not an automatic method but it definitely allows you to get step by step.
in solidworks for example there is the probe command you use to click on the node and returns the value....analogue in freecad questions ...

Ansys can't have it.

 

[Cla]

I work with solidworks and with freecad to make fem. Usually, studies of this type prefer to do them with freecad because I have the nonlinear module to make fem through calculix.
As a rule, if you want to follow a mesh point, you should manually do the required step analysis or move (depending on what allows the fem in use). through the mesh point question you need, you'll have the value of tension. do this for 5-10 steps and revenues values. then put everything in excel and do all the charts, analysis, media etc.
definitely is not an automatic method but it definitely allows you to get step by step.
in solidworks for example there is the probe command you use to click on the node and returns the value....analogue in freecad questions ...

Ansys can't have it.

I thank you, in the end I solved by inserting a path and making calculations on this path, easier than I thought ... now I'm freaking out because a priori I know that behavior is not linear and when graphic tension and deformation comes out a straight!!! !

 

[Cla]

I am probably doing wrong analysis, until now I have used equivalent tensions and deformations, I am trying other types of calculations because it is impossible that there is a linear behavior between tension and deformation (it is a plastic material whose properties are imported through an external ansys stretch)

 

[volaff]

You could study elasto-plastic behavior and good night.

 

[Cla]

You could study elasto-plastic behavior and good night.

I probably didn't understand the comment, how do I study elasto-plastic behavior? ?