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Experimental notch fracture testing to calculate KII

Submitted by laki on
research
Stress intensity factor-K II mode
V-Notch

Hi,

I am doing a v-notch fracture testing (experimental) with opening angles from 0,30,60,90,120 to 150 deg and need to calculate KII. I need a equation that could be used to calculate KII for both 0 deg and also for non-zero opening notch angles. I am using TestResources machine to do this shear testing and I will get results in terms of load vs. d. The material is PMMA. What could be the appropriate displacement/min or load to break the specimen.

Eulerian Mesh for Modelling Solid Mechanics !

Submitted by Anonymous (not verified) on

 

In modelling fluid-solid interaction, it is more common to use a coupled Eulerian-Lagrangian mesh. It would be advantageous, in a way, to model solid through an Eulerian mesh to establish a unified mesh for the whole problem; however, the litrature seems to be poor (or at least to me after searching Google) in that area!

I know that Lagrangian meshes are better for modelling solids. Nevertheless, it should not be the only way or is it?

Would you please advise on Eulerian meshes for solid modelling?   

Best regards,

INTERFACE FRACTURE IN ABAQUS

Submitted by surajmravindran on

Hiii alll,

How can we calculate J integral of interface fracture. I'm trying to reproduce results of Hutchinson paper crack defection at an interface between dissimilar material. But while using VCCT im confused that what value i can give for crack growth parameter G1c, G2c..how can we get G1c and G2c for an interface, is it needed. Want to find the energy release rate of deflection at the interface. The material interface is of aluminium and aluminium oxide. Please do reply.Hope u understand my problem.

Thank you...

Flow stress

Submitted by Bastian Boe on
education
tensile test
flow stress
cold rolling
plane strain

Hello

I am working on a thesis project dealing with flow stress in cold rolling, a plane strain operation. To determine the flow stress, tensile tests were carried out. I am aware, that the engineering strain/stress hast to be transfered to the true strain/stress and then the true strain/stress from the tensile test has to be mulitplied with the Von Mises yield criterion to yield the correspondent compressive flow stress in the rolling situation.

Dislocation migration in carbon onions

Submitted by Jianyu Huang on
research
dislocations
in-situ TEM
carbon onions

Phys. Rev. Lett. 105, 106102 (2010) 

What does a dislocation look like in a spherical geometry, and how does it migrate in such a structure? We report here the counterintuitive motion of the 1/2⟨0001⟩ edge dislocation in carbon onions from the outer surface to the inner core, i.e. from a low pressure surface to a high pressure core, rather than from the core to the surface as expected due to a surface image force. Maybe you can help us to explain this peculiar phenomenon.

Fabric Tensor

Submitted by gyanvikash on
research

I am studying the effect of intermediate microfabric on clay's mechanical behavior. In order to develope the constitutive model for clay considering its microfabric, I want to use fabric tensor. If any good paper or study material on fabric tensor is available then please send me.

Thanks

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