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stress / foreign bitch problem e

  • Thread starter Thread starter Nastran994
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Nastran994

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Hello everyone, I ask for another help on patran!!
I should insert the stress/strain curve of a steel, I managed through the .csv file to create the curve and insert it in the field "elasto-plastic" but it did not give me any result and from the error of the f06 I imagine it should also insert the information of the elastic linear part in the field "elastic liner".
the problem that comes out is:
[bleep] error - the slope of the first line in tables1 id = 1 is not equal
to and (elastic modulus) of material id = 1

So I guess he doesn't recognize the elastic module I put on him with the curve. the problem is that the linear part I have just linearized it on excel, so the points are just part of the straight with that angle coefficient. Where's the problem?
I hope I was able to explain well.
 
Why don't you put the values you entered, and load the csv file, so you can replicate? from your information I do not think it is possible to give an answer
 
strain must be a pure number. means, that, in your units of measurement if you share stress for the elastic module, you get the strain . Now it seems to me that here you dance a factor 1000.
means, that the strain you have to put in your table must be divided by 1000.
I don't understand why 1000, 100 would be that you meant it as a percentage, even if wrong, but 1000?
then try to make him read a table where the strain is correct and see if you still give this error
 
I may have understood, it should be such a mistake, I put strains not actually related to stress.

I tried and started the calculation so I don't think the problem is that but I don't get any results, I can't understand why.
 

Attachments

or rather....the sol101 leaves and I also get the results, with the sol400 instead I get nothing. .

I tried to reduce the load and now part also the sol400...it is possible that the piece with 500 [Pa] and so he wouldn't give me any results? ?
 
Last edited:
I would also like to take advantage of it to ask for another advice:
I would like to achieve through-> results->graph a stress-strain chart that shows me out the curve and then overlap it with the actual material and find the analogies. to do this I have seen that the way to realize the chart is quite intuitive, as y output would just put: stress tensor and as x displacement transitional I imagine. the doubt that came to me is to increase the strength, I should create a load case with a series of increasing forces or how much I do the analysis in subcase and load increment parameter give it a percentage increase of the force (I don't know if you can do it automatically over time).
Thank you.
 
Nastran994 said:
or rather....the sol101 leaves and I also get the results, with the sol400 instead I get nothing. .

I tried to reduce the load and now part also the sol400...it is possible that the piece with 500 [Pa] and so he wouldn't give me any results? ?
Click to expand...
That's right. with non-linear can happen. while with the linear there is no problem
 
you have to do with load increment parameter, for example every 10% and then ask to save the results for all increments and not for the final one only. but I don't remember how to do it.
 
Onda said:
you have to do with load increment parameter, for example every 10% and then ask to save the results for all increments and not for the final one only. but I don't remember how to do it.
Click to expand...
So there is the possibility of changing the load gradually over time? If you remember that this possibility can exist I try to cuff a little and try
 
the "time" in a nolinear, is a load factor. so, by imposing a number of fixed time steps, divide the load into these.
 
Unfortunately instead also doing the sol400 and putting in preference->non linear I get a subdivision in time
 
yes the load increases progressively, but I can't understand how much. I remember that when I had made several attempts I had come out load houses: 10% 20% and so on, but I don't remember and I can't get it anymore
 
in a nonlinear time is the load factor, which varies from 0 to 1.
for which, it is to all effects, a multiplier of the load. then at time 0.1 you have 10% of the load. at time 0.2 you have 20% of the load. And so on.
 
All right then thank you so much, I try to graphically report the trend of stress so! !
 

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