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Effect of electrical boundary conditions on the polarization distribution around a crack in a ferroelectric single domain
Polarization distributions around an open crack with different electrical boundary conditions in a single crystal ferroelectric are investigated by using a phase field model. The surface effect of polarization is taken into account in the phase field model, which has not been included in previous ferroelectric crack models. The simulation results show that the impermeable crack and the crack filled with air have a significant influence on the polarization distribution, while the permeable and the crack filled with water have little influence.
mathematical model for a crack emanating from one rivet hole and approaching another
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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
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
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
Cohesive strength theory ?
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What is the “cohesive strength” theory?
What are the differences in the energy consumption processes near the tip of a crack in plain concrete, fibre reinforced concret
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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
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: