CT specimen has been simulated using XFEM with the help of abaqus software. I want to know change in crack length.
Hi
Please explain more about your model. How did you defined geometry properties? Did you allow the crack to be propagated?
If you did XFEM correctly you can see the crack length when you animate it by scale factor or harmonic animator.
On the other hand, in order to be more accurate, I suggest you to know about toughness of your material. If you know for example the toughness of concrete material 1.08 , if you calculate from abaqus output "the toughness factor" (using theoretical methods) the area with more stress than you computed is the exact length of the crack propagation.
On the other hand, in ABAQUS, in field output section, you can mark the STATUS XFEM to see the failure results in visualization point of view.
Hope it can be useful for you.
Hello sajjad,
CT specimen geometry has been prepared. Elastic and plastic properties of material has been given. I took fracture toughness 115 (which is found by experimentation). In visualization crack propagation can be seen. I just wanted to know how to get crack extension value from history output. I want load Vs crack extension graph. Please let me know solution. Thanks in advance.
if you want to take a graph of load-crack propagation; follows please
before analysis:
In Step module, go to the field output manager and mark the load as RF ( every direction you want.
after analysis:
Go to visualization module:
Tools>Path>create>Node list
in this section, you have to follow the node of cracks base on your mesh seeds up to end of your fracture part (as you indicated you've had toughness) . Sometimes you need to select the nodes in exact direction of cracks plus nodes on the top or bottom line of the crack direction, too.
On the other hand, if you defined the crack by yourself, you can choose it, too.
Any way!
Next step:
In Visualization module:
click on create XY data>select Path> ---------------------- select your path which you defined above at the top of the new window
you can use True distance or Normal ......
you have to click on field output > bottom and right side> choose your appropriate RF>apply
then PLOT
Dear Sajjad Sayyar Roudsari ,
Thanks for your help. Your insight were very helpful to me!
BR,
Pedro Murilo
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