Skip to main content

Stress intensity factor for 3D crack in ansys

Submitted by kirthanlj on

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.

Convergence problem in 2-d axisymmetric elasto-plastic formulation

Submitted by rajdrdl on
Forums
Ask iMechanica
Choose a channel featured in the header of iMechanica
research

Dear all,

I am trying to solve the thermal ratcheting of a hollow cylinder using elasto-plastic formulation.

I am applying the moving thermal gradient in axial direction. Our FEM code(Newton Raphson) is converging for first increment but after that it is diverging. I have used 8 noded serendipity element with 9 gauss point.

Anyone  can please help me that why it is happening?

Thanks

Raj

Rayleigh damping: how to match the model frequences to the frequences of the measurements?

Submitted by Mike W. Long on
damping mechanical elastic body measurements modal analysis

 I hope that the mecanicians can help me to solve my problem.

 Is there any possibility to match the frequences of the physical model to the mesurement data?

Modal Analysis in Ansys to get natural frequencies and compare them with theory results

Submitted by pietro maisto on
software
Modal Analysis
Cantilever Beam Vibration Modeshapes Natural Frequencies

Hi, I'm Pietro, a short term Italian incoming student at VT (virginia tech).

My advisor, in order to start my thesis there about skin friction coefficients in a scramjet combustion chamber, gave me a Modal analysis to do on a gage described as follow:

a cantilever beam  (1mm diameter and 3cm long cylindrical shape) with 1mm depth and 1cm diameter cylindrical flat "hat" attached upon.

Base constraints: zero displacements, zero rotation

Subscribe to