I am trying to perform a rupture analysis and I have to enter three parameters:
Triaxiality
Strain rate
Fracture strain.
How can I effectively get these parameters?
Why in some examples one uses tabular data? What is the significance of this?
Many thanks
Ionut
Dear Sir,
You can find a description for these parameters in the attached paper (Chapter 4).
As an example for steel reinforcement, a set of values for the “Fracture strain”, “Stress triaxiality”, “Strain rate” and “Fracture energy” parameters used is Abaqus are presented in the following paper:
https://www.sciencedirect.com/science/article/abs/pii/S1350630718300761
Best regards!
Hi Ionut,
When you define tabular data for damage initiation, a 3D function is estimated (to inter/ extrapolate the provided data) using this three parameters as co-ordinates. So that, you have a Fracture strain for any Stress triaxiality and Strain rate. An example of a similar 3D function plot can be seen in Fig. 1 in this document,
https://www.3ds.com/fileadmin/PRODUCTS/SIMULIA/PDF/scc-papers/identification-of-ductile-damage-parameters-13.pdf
One of the axes is lode parameter (depends on stress sate) which is an additional parameter damage initiation can made dependent on using key word or modifying input file (not possible in CAE).
This can be replaced by strain rate and you have your desired function plotted for intuition.
Characterisation of these parameters you are looking for need lots of experiments or borrow from other researchers. You can read more on that in the document I mentioned above.
Cheers!
Hi,
You will find some useful information of how to get these values from the following thesis
DYNAMIC RESPONSE OF STRUCTURAL STEEL ELEMENTS POST-STRENGTHENED WITH CFRP
Regards
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