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Stress concentartion factors in the beams with hole under pure moment

Submitted by manooir on

Dear All,

I have a beam with a hole under pure bending moment. I am very intrested to know is there any

relationship between the moment in the beam section and the stress concentartion (specially tensile stresses due to moment ) around the hole?

Any help will be highly appreciated,

Thank you,

Manooir

problem to define Tsai-Wu failure criteria Timber beam ANSYS

Submitted by Farzad Moshiri on

I am a PhD student on Timber structure.I have modelled timber beam using solid 45 element as 4 points bending but my result is overestimated.I have reviewed the literature and I have found that assigning Tsai_Wu failure mode in timber can solve the problem.I have found Tsai-Wu in following category in Ansys 12.1:Material model/nonlinear/inelastic/non metal plasticity/failure criteria/criteria3But Ansys appears the following error:*** ERROR ***                         

Fracture In Bi-materials

Submitted by srisaika on

Hi 

 I am working on a project where fracture parameters are to be studied at the interface of a bimaterial body ..I would like your help for the following 

1 .If there is any Material or papers contentrating on the above plz let me know

2 . Which FEA Program gives or works best on this kind of prioblems 

 

thanks in advance 

CNT+polymer pulling out

Submitted by hamed_amini on

 

Dear all,



I am doing MD simulation of  pullout of CNT+polymer.

It is mentioned in some lectures that before pulling process the CNT should be
relaxed using potential like Brener and during pullout, CNT is considered as
rigid.

If the CNT is completely free to move during relaxation
it will be deformed and distorted and will stop the simulation.

For solving this problem I think that CNT should free to move only in axial
direction during CNT relaxation. Anybody have idea?


Help on Distribution of Bolt Load in 3D

Submitted by ruzbeh on

I am kind of new in computational simulation except for CFD. I have a cylinder which has a flange around it and a lid on top. Lid and the flange are connected by bolts and sealed with an o ring. Is it possible to simulate the load distribution around the flange due to tightening the bolts? Which package is most suitable for this comsol or Abaqus? I want to do simple simulation just to check whether the odd number of bolts are able to distribute load uniformly around the flange.

 

Thanks in advance.