informative video: please make a video on how to calculate damage ductile material parameters from a stress strain curve ( i-e fracture strain, stress triaxiality , strain rate and damage evolution parameters i-e displacement at failure)
very informative! I have just one question: The damage initiation value (0.15) is not too high compared to the maximum plastic strain (0.0585) and damage evolution displacement (0.117)? that should not be a value near to the maximum plastic strain (0.0585) ?
Thanks for the useful video Can I use this method to define damage evolution parameters in damage for traction-separation laws? actually i'm doing xfem and i have to use traction-separation laws but there is no guide videos.,,,
Dear, Traction separation law is useful when, the interface adhesive layer has a finite thickness and macroscopic properties (such as stiffness and strength) of the adhesive material are available. It allows specification of material data such as the fracture energy as a function of the ratio of normal to shear deformation. Also it allows multiple damage mechanisms. In short yes it is possible.
Dear, Ideally for biaxial test it should be 1/3. But unfortunately i forgot to put value during video recording. You can read details of stress triaxiality here - en.m.wikipedia.org/wiki/Stress_triaxiality
Thanks for the useful video Can I use ductile damage for weld? My model is about progressive collapse. I apply the load on a column and I want to calculate the strength of the weld.
Dear, Material calibration means simply find the true stress strain curve from engineering SS curve and finally extract E, yield stress, ultimate strength, and plastic strain strain data to feed in Abaqus material definition. Abaqus provide this all using material calibration option. Characteristics length*2 = value equal to twice the characteristic length.
Dear, Material calibration is different thing and calculation of "displacement at damage" is different thing. Calculating"displacement at damage " i already explained in my previous videos of damage. Please go through video list at my channel and find. Material Calibration video i not uploaded but avilable on UA-cam.
Dear, For general static step it is not required but for quasi-static step (as well for dynamic) it is required. Apart from linear dynamic, frequency analysis, buckling analysis it need to define density. I suggest to use density parameter always...it makes you habitual of using this parameter.
This confuses me a bit, from the Abaqus manual it says that fracture strain is the plastic strain at damage initiation so it should refer to the strain at the ultimate tensile strength.
There's something wrong in this video, Stress triaxiality factor must be one third at the Uni-Axial tension test.
Dear,
By fault i forgot this...and i accepted in comments.
thank you very much for informative and to the point explanation.... well done sir
Glad it was helpful..keep watching..!
informative video: please make a video on how to calculate damage ductile material parameters from a stress strain curve ( i-e fracture strain, stress triaxiality , strain rate and damage evolution parameters i-e displacement at failure)
very informative! I have just one question: The damage initiation value (0.15) is not too high compared to the maximum plastic strain (0.0585) and damage evolution displacement (0.117)? that should not be a value near to the maximum plastic strain (0.0585) ?
Please give some insight on material calibration
Ok dear.
I'll try to make video on it.
Thanks for the useful video
Can I use this method to define damage evolution parameters in damage for traction-separation laws?
actually i'm doing xfem and i have to use traction-separation laws but there is no guide videos.,,,
Dear,
Traction separation law is useful when, the interface adhesive layer has a finite thickness and macroscopic properties (such as stiffness and strength) of the adhesive material are available.
It allows specification of material data such as the fracture energy as a function of the ratio of normal to shear deformation.
Also it allows multiple damage mechanisms.
In short yes it is possible.
please make a video on material calibration
Sure dear.
sir your videos are very amazing. please do based on bird strike analysis on wing leading edge aluminium7050.
sir, how i get to know characteristic length of an element?
in damage evolution what is the difference between displace ment and energy
Sir, what is the stress triaxiality reqd here?
Dear,
Ideally for biaxial test it should be 1/3. But unfortunately i forgot to put value during video recording.
You can read details of stress triaxiality here - en.m.wikipedia.org/wiki/Stress_triaxiality
Sir can you make video on simple tension of composite using inbuilt hashin model with continuum shell element
Dear,
Let me know where you are facing difficulty.
Thanks for the useful video
Can I use ductile damage for weld?
My model is about progressive collapse. I apply the load on a column and I want to calculate the strength of the weld.
Dear,
Yes you can apply this technique for approximate weld strength.
@@arsitech-ltd
Can you suggest a reference or guide for doing that please?
@@رامینمجرد-ف5ز I also would like to know, please
Hai sir, which online platform is best for learning abaqus for crash & fatigue and durability analysis.
Abaqus documentation and related FEA books are always great.
how to do calibration and what is characteristic length *2
Dear,
Material calibration means simply find the true stress strain curve from engineering SS curve and finally extract E, yield stress, ultimate strength, and plastic strain strain data to feed in Abaqus material definition.
Abaqus provide this all using material calibration option.
Characteristics length*2 = value equal to twice the characteristic length.
@@arsitech-ltd Can you please post a video on this?
Dear,
Material calibration is different thing and calculation of "displacement at damage" is different thing.
Calculating"displacement at damage " i already explained in my previous videos of damage. Please go through video list at my channel and find.
Material Calibration video i not uploaded but avilable on UA-cam.
@@arsitech-ltd thanks
Is defining density required for a static analysis?
Dear,
For general static step it is not required but for quasi-static step (as well for dynamic) it is required.
Apart from linear dynamic, frequency analysis, buckling analysis it need to define density.
I suggest to use density parameter always...it makes you habitual of using this parameter.
This confuses me a bit, from the Abaqus manual it says that fracture strain is the plastic strain at damage initiation so it should refer to the strain at the ultimate tensile strength.
Yes dear,
Damage initiate from the UTS point only.
Why your Stress Triaxiality equals 0? Is it correct value?
No...i forgot somehow.
Sir please make a video on compression of porous metal using gurson model.
Dear,
I not used guraon material model.
@@arsitech-ltd can you make a video on implementation of gurson model in compression?
Dear,
As i mentioned in above...i never used gurson material model.
Friction stir welding possible sir?
For Friction stir welding we use CEL or ALE technique.
Is it possible to create a 3D fracture locus using abaqus?
Yes possible.