I am trying to calculate the T stress for a mixed mode (I/II) problem using the interaction integral technique in ANSYS for a plane stress problem. But the T stress is not converging with the mesh refinement and the magnitude of T stress keeps on increasing as the mesh is refined. The magnitude of change is given below.
size of element T stress
0.5 -10.1
0.05 -30.2
0.005 -100.3
0.0005 -300.7
0.00005 -999.6
On the other hand, the value of SIFs is almost the same for all element sizes.
Can anyone suggest how to obtain the T stress from ANSYS in-plane stress problem accurately?
Shiv Sahaya Shukla , Dear what material u have used actually ??linear elastic material properties or different? U can try by Calculating the SigmaXX and SigmaYY for each node and use the formula (SigmaXX-SigmaYY)at (tita) zero . Then using linear regression calculate T-stress at the vicinity of the crack tip. If you donot understand then you can refer this thesis. Hopefully useful for you😊
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiBhKmA7eXyAhVLU30KHWA8CKY4ChAWegQIAhAB&url=https%3A%2F%2Fdigibuo.uniovi.es%2Fdspace%2Fbitstream%2Fhandle%2F10651%2F42873%2FTFG_%2520ClaudiaOliverFigueira.pdf%3Fsequence%3D6%26isAllowed%3Dy&usg=AOvVaw1qIi2lVLdFY1SVYpUzeFuN
Regards,
Abdul
Abdul Gaphur sir, you are right, and this is one of the approaches for calculating the T stress. But at the same time, it requires a lot of post-processing efforts. Actually, there is a technique called interaction integral for calculating the T-stress. And ANSYS has this beautiful feature for calculating T-stress using interaction integral technique using CINT command but only for plane strain problems.
Since my crack problem is a plane stress problem the ANSYS is giving me erroneous values with the mesh refinement. I need to know if there is any special procedure in ANSYS to calculate T-stress for plane stress problems.
Abdul Gaphur the thesis is in Spanish and I don't know how to read the Spanish language.
Shiv Sahaya Shukla both languages are present including English, please see and read carefully...
Regards,
Abdul Gaphur I checked the thesis once again and yes it has an English version also thanks.
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