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Submitted by 501675891 on

hi,

i am satish. i am trying to calculate interference stress in interference fit with following dimensions.there is a difference b/w analytical and simulated results. here i am giving dimensions kindly inform to me the values of von misses and pressure at intereference.

shaft od=938.7378, core id=937.8, and core od=1138.2

E=2.1e5,m=.29and coe.of friction=.14

please... help me...

Thanks

satish

 

 

JOURNAL CLUB DEC 1 08: CYBER-ENABLED PREDICTIVE SCIENCE-BASED CONTINUUM MECHANICS FOR MULTISCALE FRACTURE PROCESS DISCOVERY

Submitted by Wing Kam Liu on
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The key to developing materials against failure under extreme environments is the understanding of the interplay between the various physical scales present, from the atomic level interactions, to the microstructural composition and the macroscale behavior. The ability to do this requires new methods that can be used to predict macroscale properties accurately based on microstructures and nanostructures without resorting to empiricism.

any theories on the stress wave propagation in concrete?

Submitted by xuhao on

does anyone know any current theories on the stress wave propagation in a  complex media(such as concrete or rock).(1D sphere wave or complex)

all i see is the simulation with a complex constitutive model. but i think it`s not perfect. 

hope for your help

NANOSHEL

Submitted by Nanoshel on

NANOSHEL makes more than 50 types of products, among which the main products are nanotubes, SWCNT´s, MWCNT´s, nanoparticles,. These products are widely used in the fields such as textile industry, ceramics, chemical fiber, plastics, coatings, cosmetics, rubber, electrical and electronic equipments, electric power generation and boiler and so on.

Problem with nominal vs true values

Submitted by Andreas Burger on

Hi,

 I have cyclic uniaxial compression data of a PU.  When I look at nominal stress vs nominal strain then the relation is clearly nonlinear (increasing stiffnes with increasing  strain).  When I convert to true stress vs true strain I still have a nonlinear relation, however, not as strong and the stiffness decreases with increasing strain.

When I look at true stress vs stretch, however, the relation seems to be almost (I'm only talking about the first loading cycle) linear. Nominal stress vs stretch is still nonlinear. 

Help on ABAQUS UMAT subroutine

Submitted by m.khorrami on

I plan to use UMAT to do some simulations on soft tissue. Since I do not have experiences on this, I hope to find some example UMAT code to start with, especially on the thermo-elasto-pelastic models. I searched from google.com, but can not find useful information. Is there any resource on UMAT fortran code for downloading? Thank you very much.

Fatigue

Submitted by Anonymous (not verified) on

what softwares can be used to predict the fatigue in Multi body dynamics problems

the information is needed for the post graduate thesis work