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mathematical model for a crack emanating from one rivet hole and approaching another

Submitted by anand_mtech on
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Hi All,

 

i am doing my m. tech project on " FE modeling and validating to find stress intensity factor for a crack emanating from one rivet hole and approaching another rivet hole".I have developed the FE model in ANSYS and tabulated stress intensity factor at crack tip from different crack length. But to validate my result i want an mathematical model or formula. Please suggest me an formula to find KI at the crack tip for this problem.

what are the new recent advances in meshfree methods

Submitted by productiquenc on
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i'm in my first year of doctorat level, and i work on meshfree methods applied in mechanical field, i would ask for recent research in this field and some indications for : what new to explore (composit materials, crack and fractures, other new materials...) in this field

Surface mediated plasticity in sub-10-nm-sized gold crystals

Submitted by Jianyu Huang on
research
nanomechanics
Plasticity
in-situ TEM
surface
Nature Communications 1, Article number:144 | DOI:10.1038/ncomms1149

Although deformation processes in submicron-sized metallic crystals are
well documented, the direct observation of deformation mechanisms in
crystals with dimensions below the sub-10-nm range is currently lacking.
Here, through in situ high-resolution transmission electron
microscopy (HRTEM) observations, we show that (1) in sharp contrast to
what happens in bulk materials, in which plasticity is mediated by
dislocation emission from Frank-Read sources and multiplication, partial
dislocations emitted from free surfaces dominate the deformation of

ansys

Submitted by sumi_iitd on
research
PIEZO

 

Hello every body.

                             i ve a very simple question regarding ansys. can anybody can suggest how to mesh the glued area.what is the best element to use for adhesive bonding for 2d case

What are the differences in the energy consumption processes near the tip of a crack in plain concrete, fibre reinforced concret

Submitted by Fatigue on
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What are the differences in the energy consumption processes near the tip of a crack in plain concrete, fibre reinforced concrete and metals?

Inverse eigenstrain analysis based on residual strains in the case of small strain geometric nonlinearity

Submitted by Sébastien Turcaud on
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small strain
eigenstrain
inverse problem
Geometric nonlinearity

Hi,

I was wondering if someone knows literature related to "Inverse eigenstrain analysis based on residual strains in the case of small strain geometric nonlinearity"? (elongated bodies)

In the case of lineralized elasticity I guess one could postulate an eigenstrain distribution as the sum of a finite set of basic eigenstrain distribution and minimize the difference between the predicted and the actual residual strain distribution (retrieved from a synchroton mapping for example).

As done in the paper:

Turning a shaft through conact pressure in ABAQUS/standard?

Submitted by hmpws on
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Contact Mechanics Forum
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ABAQUS
contact
shaft

Hello all,

This is my first post here. This seems be an informative and helpful forum.

I am trying to model the rotation of a "hard" shaft as a result of motion of 2 strips of soft materials (please see attached figure).

The strips are deformed due to external forces and as a result, contact pressures are applied on the shaft. The forces are then varied on the strips leading to net rotational forces on the shaft.

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