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Discussion of fracture paper #6 - Stress intensity factor for steep yield distribution

Submitted by ESIS on

T. Yasuoka, Y. Mizutani, A. Todoroki: Applicable limit of the stress intensity factor for steep yield strength distribution, Engineering Fracture Mechanics, 2013, Vol. 110, pp. 1-11.

To the discussion

Subspace Iteration eigenvalues and eigenvectors--efficient implementation?

Submitted by Echeban on
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Anyone knows an efficient implementation of the subspace iteration method to compute a few lower eigenvalues and eigenvectors of a generalized problem KG*u=lambda*KS*u or any similar method? i.e., to compute the buckling loads and modes.

I'd like to use something optimized to Intel or amd64 processors or similar, like MKL, etc.

This is for bifurcation buckling analysis. KG is the stiffness matrix. KS is the geometric stress matrix. Both constructed from a FEM discretization.

Strengthening alginate/polyacrylamide hydrogels using various multivalent cations

Submitted by _canhuiyang on
We successfully synthesized a family of alginate/polyacrylamide hydrogels using various multivalent cations. These hydrogels exhibit exceptional mechanical properties. In particular, we found that the hydrogels cross-linked by trivalent cations are much stronger than those cross-linked by divalent cations. We demonstrate stretchability and toughness of the hydrogels by inflating a hydrogel sheet

Running MD simulations with LAMMPS

Submitted by Nuwan Dewapriya on

In appendix A of my PhD thesis, I share a MATLAB code to get coordinates of carbon atoms in a graphene sheet. The code also generates the data file required for LAMMPS. In addition, I included a sample input and the corresponding output files from LAMMPS. I hope this will be useful for those who would like to learn MD simulations.

Visual Molecular Dynamics (VMD) package can also be used to obtain coordinates of graphene.

Determination of Density of Laminated Composite

Submitted by Amin Khajeh on

Dear Engineers,

 I would like to determine the density of laminated composite which consists of one lamina E-Glass/Epoxy and another one is thin layer of steel plate due to determining Young's Modulus through non-diestructive technique-Impulse excitation.

Any suggestions would be welcome.

 

var vglnk = { api_url: '//api.viglink.com/api', key: 'a187ca0f52aa99eb8b5c172d5d93c05b' };

var vglnk = { api_url: '//api.viglink.com/api', key: 'a187ca0f52aa99eb8b5c172d5d93c05b' };

Abaqus Subroutine and python subscripting

Submitted by rajnish0007 on

Dear All, 

I was wondering if anyone used abaqus user subroutines to couple the micro and macro models? If any one has used it and is also willing to share the knowledge?

I am looking for some guidance on how to run another *inp and get it's out put in the subroutine. any example on this is greatly appreciated.