How we can calculate K1 value from J - integral result from abaqus?.
K1 value directly from abaqus is reliable? Because its crack initiation criterion is Max tangential stress, Max energy release rate and KII= 0. Which criterion will give correct results? Its depends on problem we handle. Thats I know. But if no value is available for crack initiation criterion ( Also, I introduce crack initially. So its invalid as crack initiation criterion - As of my understanding)
So, K1 value from J integral will give correct results.( I think so). But how we can get K1 value from that?
In fracture mechanics book G=GI+GII
GI= alpha*KI^2/E
GII = alpha*KII^2/E
alpha = 1 , plane stress
alpha = 1-nu^2, plane strain
nu = Poisson's ratio
G can take it as J - Integral?
If we take so, what will be KII?
Also, Critical J-Integral is same as fracture energy of a material?
Hi,
These will be helpful.
https://abaqus-docs.mit.edu/2017/English/SIMACAEANLRefMap/simaanl-c-contintegral.htm
https://www.researchgate.net/post/How_to_get_K1_and_K2_from_J-integral_for_mixed_mode
Hello,
Based on the LEFM theory, you can use the Maximum Tangential Stress (MTS) criterion for materials that adhere to brittle fracture to extract SIF's.
You can obtain SIF's value directly from ABAQUS.
Thank you very much Mr. Satyendra Pratap Singh and Mr. H. Ghesmati-Kucheki
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