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Fracture mechanics

Submitted by vinay kumar B A on

hi all..

 

i am having one doubt, please help me.

 

In a isotropic plate,  if crack tip is present then to model the crack tip we use quarter point element ( IN ANSYS).

if we wants to model more than one crack tip than ,, ansys will give following error

" Only one stress concentration can be specified per area"

Please let me know what is the procedure to model more than one crack tip.

Thanking you

vinaya 

 

Yield line theory application to a edge fixed disk by central load

Submitted by jason Zhu on

Dear all,

   I am trying to apply the Yield line theory to analyze the fracture of a disk by central load, F.

   Do anybody know the yield line on the disk? I searched some books to find most references focus on rectangular plate rather than disk.

   All suggestions are welcome. Thanks.

 

modelling of rectangular composite plates using ANSYS

Submitted by sharma_avadesh on

I have to analyse the carbon/epoxy composite laminate in ANSYS,  to determine the natural frequency of rectangular composite plates. The plate is simply supported . I  am not able to model the composite lay up with the correct orientation of the fibre. so any body have the step by step procedure for modelling the composite lay up in ANSYS and how to determine natural frequencies  please give it to me on my e-mail:  sharma_avadesh [at] yahoo.com

3D Composite model in ABAQUS

Submitted by parimal_maity on

Dear Abaqus Users,

I would like to model 3D composite structures using Hashin Damage model in ABAQUS. I have seen in ABAQUS manual that Hashin damage model is applicable only for shell element. I would like know whether I can use 3D element available in ABAQUS. Any help would be higly appreciated.

Parimal

Research Scholar

Michigan State University.

 

 

 

plastic analysis of a plate containing an edge notch and a piezoelectric inhomogeniety with ansys

Submitted by rojin on

Hi,

I am rojin ghandriz,study M.c civil engeeniring at sharif university in iran,

I study on my tesis a bout plastic analysis of a plate containing an edge notch and a piezoelectric inhomogeniety.

I have questions a bout the crack initiation in Ansys v11.0..How could i get initiation of crack whit increasing tensile loading on plate in ansys?

thanks

rojin

question about binding reaction in surface of Microcantilever

Submitted by Changguo Xue on

  As shown in the figure of Microcantilever biosensor,antigen solution flow into the cell, the banding reaction take place between the antigen and antibody. Wu research on the diffusion of molecules for long detection time (Wu, Datar et al. 2001), Berger elucidated the kinetics of stress curve for self-assembly as a simple adsorption isotherm.(Berger, Delamarche et al. 1998). 

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Rac activation by stress does not depend on Src

Submitted by Ning Wang on

It is known that platelet derived growth factor (PDGF) induced Rac activation depends on Src activity. However, we find that a local stress of physiologic magnitude via integrins can directly activate Rac GTPase rapidly, independent of the Src activity. Our finding on the stress-induced rapid Rac activation challenges the conventional wisdom on mechanotransduction and suggests that stress-induced signaling via focal adhesions does not follow signal transduction pathways induced by growth factors. To view the whole paper: