How to GET STRESS-STRAIN PLOTS in ABAQUS by Probing Regions
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- เผยแพร่เมื่อ 30 มิ.ย. 2024
- ABAQUS Tips and Tricks Series: This video shows detailed steps in generating stress-strain curves in ABAQUS using by probing regions in the simulation results - a strategy called the Localization Approach.
The process is demonstrated using a dogbone specimen subjected to a tensile deformation, with a polypropylene material. Two specimen types were used (a) One with no hole, showing even distribution of stress in the guage section and (b) another specimen with a hole (stress-concentrator) which shows localized stress concentration around the hole.
In the end, the stress strain data from different probed zones were compared and insights drawn from the results. #cmvideos #abaqustutorial #rve #stressstraincurve #pbcgen2D #montcarlgen2D #AbaqusTipsAndTricks
Time stamps
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You can quickly navigate through the videos using these chapters.
00:00 - Intro
00:17 - Design of tensile specimen to be used (ASTM D638 Type I specimen)
00:46 - What is the Localization method?
01:11 - Probing stress-strain data for a specimen without stress concentrator
02:35 - Probing stress-strain plot around a stress concentrator
04:19 - Probing stress-strain plot inside a stress-concentrator region
05:17 - Comparison of stress-strain plots from three different probed regions
06:37 - Outro
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very nice way of explaining the concept with good demonstration
Thanks and welcome
Dear Dr. Mike,
Your tutorials are very much helpful. I am requesting you to make a tutorial on obtaining stress-strain diagram (with plateau behavior) for open porous metalic foams.
Also can you suggest which type of material model should be used to tackle the above mentioned problem?
Thank you for your time.
Thanks for the comment.
I haven't done any plot for metallic foams, but it should follow such sequence as this video except in the material model used and the design of the virtual domain.
The critical bit is in recovering the plateau as that results from the crushing and buckling structural failure of the pores.
In ABAQUS, I don't think there is an inbuilt metallic foam model.
So, to model a metallic foam with a plateau zone and strain hardening in Abaqus, you can use the "Linear Elastic-Plastic" material model with isotropic hardening.
This material model allows you to capture both the initial plastic plateau behavior and the strain hardening response.
The plateau behaviour can be due to the buckling and crushing collapse of the struts, which suggests you have to model it in detail, too.
Where you want the true foam response to come from a material behaviour, I am afraid you'd have to code it up.
@@MichaelOkereke Thank you for the detailed responce on my query. I will alter the material model as per suggestion and give it a try.
Thank you Dr for this video, so helpful, i like to ask you question : is it possible to extract stress/strain curve from cross section or juste only from element or nodes ??? and how to choose this element for comparaison with experemental results??
Dear, thanks for the comment.
On your question of extracting stress/strain from a cross-section, this is called a Volume-Averaging Method and I made a video where I showed this which you can watch here: th-cam.com/video/gCQzzF8Few8/w-d-xo.html
With regards to how to select element for comparison wiht experimental data, it is better to use the volume-averaging method as that will give a more experimental-relevant result that just selectively picking elements as shown in this method. This approach shown here is merely to explore/probe stress-distributon acros a heterogeneous media. There is no standard method for choosing elements, it depends on what you are trying to find out from your simulation.
Dear Professor I am working on the modeling of a concrete column wrapped with frp. Please could you help me? Is there any email where I can share with you my questions ?
Hello, I would not be able to help with this query. Good luck!
Hello Doctor Mike, do you recommend generating the stress strain data based on the single element for composite material because I could see from the shape of the specimen you used in this video that the material is isotropic.
Hello, I will not recommend this method for a composite as it has variable stress distribution. The better way is to use a homogenization or volume averaging approach. Here is a video that shows you how to use the volume-averaging method: th-cam.com/video/gCQzzF8Few8/w-d-xo.html
Please can you help me write my thesis using finite element analysis
This is wrong and not the sort of thing I get involved in. I answer questions on computational modelling issues you are struggling with but never writing thesis for anyone.
Please Dr. Can I get video tetorial onSimulation tests of static tensile testing of Ni added to base aluminium
Simulation tests of tensile strength of Ni added to base aluminium
Simulation tests of stress failure of Ni added to base aluminium
Simulation tests of strain failure of Ni added to base aluminium
Simulation tests of deformation failure of Ni added to base aluminium
Simulation tests of static tensile testing of Ni and B added to base aluminium
Simulation tests of tensile strength of Ni and B added to base aluminium
Simulation tests of stress failure of Ni and B added to base aluminium
Simulation tests of strain failure of Ni and B added to base aluminium
Simulation tests of deformation failure of Ni and B added to base aluminium