Fracture Mechanics Forum

Hello,

I am pursuing masters and I have chosen the orthogonal cutting

simulation as my project.

We have done the experimentation work and now I am looking for the FEA

simulation of the same operation. (The parameters I am interested in

are Chip Morphology, Cutting Forces & Residual stresses in the

component)



I am just going to use explicit first time and I am looking for some

reference doc. & input file.



Any help in this regard would be highly appreciated.

Hi :

I am obtainning the Stress Intensity factors along the front of cracks in a 3D FE models (ANSYS). The loading mode is mixed and Ki, Kii and Kii should be estimated. I have noticed that the SIF  strongly depends on the poisson's ratio but i understand Ki does not depends on the elastic properties of material. I know ANSYS calculates the SIF from the displacements at the crack tip using E and mu, but i did not expect so huge differences in SIF values, In fact all analytical predictions for SIF does not depends on poisson's ratio....

Dear all,

I want to measure the Kc value of 2024-T3 sheet. But the sheet with 80x100x2.5 mm is so small that Kc value can not be measured out. Maybe the sheet for measuring the Kc value shall be 400x1000x2.5mm. And in experimental scale, that so large sheet of 400x1000x2.5 mm is difficult to processing.

And are there another value to substitute the Kc value to weigh the fracture toughness of the alloy sheet with 80x100x2.5 mm?  May I measure the Jc value of that material and then convert it to Kc value?

Thanks for your time.

Hello Everybody

I´ve got problem with propagating the crack in
two regions at the same time in Franc3d. I initialized the crack in one
region and propagated it, but the crack is propagating only in one
region, although the crack should be propagated also in second region.
Can anyone help me, pleease? Which steps do I need to take to obtain
the propagation in first and second region? It´s imposibble to
initialize crack in two regions? 

Thanx

HI,

I am an M. Tech Student working on fracture mechanics. I just want to know how do i plot Normalization curve as describe in ASTM E-1180. It is of the form 

y = (ax^2 + bx + c)/(d + x)

any help in this regard will be appreciated

hi

i have mapped meshed the compact tension specimen in ansys but every when i see sepc error using prerr it always shows above 20. i have change the mesh size to a very fine still it shows 18 i will be thankful to this forum people if you give me some useful tips

Regards

Zoeb Lakdawala