Hi, how did u join the cohesive elements with the rubber elements? Did u apply contacts or just equivalence? I am trying to do the same example in hypermesh and I have this huge doubt. Thank u in advance
Hi, I have talked about assumption of same fracture energy in all mode at the end of this video: th-cam.com/video/XYIpxyVf5Vk/w-d-xo.html Ideally, if you know the fracture energy, use mode dependent value of each mode.
In the beginning, you defined the modulus of rubber = 10 MPa and in the material property section, you are giving the modulus of rubber = 2 GPa/MPa. Can you please clarify the confusion? Again, you defined all the dimensions in mm and the modulus is in GPa (not sure)...
Unfortunately, using the given configuration (along with the one given in the "Force displacement curve in ABAQUS" video), the calculation does not converge.
@@10Minuters If the cohesive (adhesive) material is rubber, Enn of cohesive should be the same as the Rubber modulus. Is it right? Enn in cohesive should be young's modulus
@@崔晓雨-s2n Yes, it should be same as rubber. Try that. However, low value of Enn can make the simulation slower (Even the job might abort!). Using Enn=10*Enn (rubber) i.e 10 time higher or more can result in faster simulation. Changing Enn by such factor has minor effect on the final simulation output. We always do such manipulations (like mass scaling) to increase simulation efficiency. If you eventually decide/ need to change Enn to a higher number, do some simulation with several value of Enn to get which works well for your model.
Hi, how did u join the cohesive elements with the rubber elements? Did u apply contacts or just equivalence? I am trying to do the same example in hypermesh and I have this huge doubt. Thank u in advance
Is there any reference video for the things you missed / didn't show in this video? Like creating step, reference point , Boundary Conditions?
sir , I don't understand why only one fracture energy is enough,Can you explain it? THANKS
Hi, I have talked about assumption of same fracture energy in all mode at the end of this video: th-cam.com/video/XYIpxyVf5Vk/w-d-xo.html
Ideally, if you know the fracture energy, use mode dependent value of each mode.
In the beginning, you defined the modulus of rubber = 10 MPa and in the material property section, you are giving the modulus of rubber = 2 GPa/MPa. Can you please clarify the confusion? Again, you defined all the dimensions in mm and the modulus is in GPa (not sure)...
Unfortunately, using the given configuration (along with the one given in the "Force displacement curve in ABAQUS" video), the calculation does not converge.
Hello there,
Why you used stress intensity factor (KIC [ MPam1/2 ]) instead of fracture energy (critical energy release rate [KJ/m2])??
Could you share me with the input file? Thank you very much!
Thanks for the tutorial. Can you tell the Boundary Conditions and the Loading
Hi Anish, the bottom edge was fixed (U1=U2=UR1=UR2=0) and the top edge was pulled using prescribed displacement (U2=5 and U1=UR1=UR2=0)
Hello, when I try to assign cohesive the cohesive doesn't appear in the assign section window even tho I did things the same way as you !
In Section, select 'others' and then the option 'cohesive' will be available.
@@10Minuters while creating the section it appears, but asI try to assign it, it doesn't appear in the window of edit section assignment
Hello! What is the time increment/step values for this problem? Is NIgeom on or off?
Thank you!
why the modulus of cohesive is 1000 of rubber?
This is not the right parameter for Rubber. All values in this example are arbitrary.
@@10Minuters If the cohesive (adhesive) material is rubber, Enn of cohesive should be the same as the Rubber modulus. Is it right? Enn in cohesive should be young's modulus
@@崔晓雨-s2n Yes, it should be same as rubber. Try that.
However, low value of Enn can make the simulation slower (Even the job might abort!). Using Enn=10*Enn (rubber) i.e 10 time higher or more can result in faster simulation. Changing Enn by such factor has minor effect on the final simulation output. We always do such manipulations (like mass scaling) to increase simulation efficiency.
If you eventually decide/ need to change Enn to a higher number, do some simulation with several value of Enn to get which works well for your model.
@@10Minuters thanks so much