kirthanlj's blog

I am pursuing my phD in one of the universities in india in fracture mechanics. I have completed all the formalities of my university before submitting the final thesis report like completing the course work examinations and comprehensive vivavoce. My work is related to accurate stress intensity factor determination at the crack tip through FEA approach for a mixed mode crack propagation.I have taken a new methodology suggested in one of the old journal papers in FEM and I have used the formulae mentioned in that paper to extract the SIF results.

hi all,

I am facing problem in understanding stress intensity factor. How exactly i can analyse crack propagation through SIF. In books it is given that SIF characterises the crack. But in numbers how can i know whether this crack will propagate for this value of SIF. According to westergaard equation crack tip stresses will go to infinity if θ and r tends to zero for any value of crack length. Please somebody help regarding this. If iam technically wrong please correct me.

Thank you

Kirthan.L.J 

Hello to all,

Iam in desperate need of advanced tutorials of ansys in non linear field. Can anybody if having please mail me to contactkirthan@gmail.com.

Thanking you

Kirthan.L.J

Hello to all the research scholars. Sir, I am a Phd student in computational fracture mechanics. Right now i am stuck with a problem where i am not able analyze SIF (K1, K2, K3) for a 3D crack in ansys. Ansys asks the path for K value and i am choosing 5 nodes along the 2 crack edges for a full crack model and I also went for both global coordinate system and local coordinate system for finding K. Finally when i went to nodal calc and SIF then it is giving only plane stress and plane strain conditions with full or half crack models. But I am not able to get SIF on the crack front as i am not choosing the path along the crack front. It is only giving SIF at the crack tip considering only the area. Am i not correct or does ansys has limitations on this. Please guide me in this.

Sir,

one of my students is working on PhD topic " Study of cold hole expansion and evaluation of fatigue properties on critical aerospace components". His work has to be reviewed by professor of non indian origin in foreign universities. I request you to kindly help this student. If you are interested, let me know, so that I will ask my university to contact you in this regard.

Thanks

Kirthan.L.J