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Membrane interactions control residues fluctuations of outer membrane porins

Bacterial outer membrane porins (Omp) that have robust ß-barrel structures, show potential ap-
plications for nanomedicine devices in synthetic membranes and single molecule detection biosensors.
Here, we explore the conformational dynamics of a set of 22 outer membrane porins, classified into
five major groups: general porins, specific porins, transport Omps, poreless Omps and composed
pores. Normal mode analysis, based on mechanical vibration theory and elastic network model, is

Simulation ENF Specimen with Fibre Metal Laminates in ABAQUS

Hello everybody,i am trying to analyze a Fibre Metal Laminate ENF specimen for crack porpagation with ABAQUS. Therefore i am using the VCCT method. The model is running, but not with the expected outcome. The problem is that there is no crack propagation, as Mode II energy release rate is Zero. I really don't know why. I am using the "composite layup" function with continuum sheels and SC8R reduced integration continuum shell elements. To get an ENF specimen iam stacking this layup and model a frictionless contact between.

Ali_Hadjesfandiari's picture

New perspective on Couple Stress theory resolving the indeterminacy issue

Dear fellow Mechanicians,We have done this research on couple stress theory which we believe has resolved the problem of indeterminacy in the spherical part of the couple-stress tensor and the appearance of the body couple in the constitutive relation for the force-stress tensor  (Mindlin and Tiersten, 1962).I humbly request you to read the paper and give me your feedback.

diffusion equation using finite element

Hi,

I would like to write a simple subroutine to solve diffusion equation d(ro)/dt = k∇2(ro). using finite element method.

Any suggestions ?

 

Thanks,

Ayoub 

Ansys Tutorial for reinforced concrete with FRP

Does anyone have an Ansys tutorial for reinforced concrete with FRP? I have to model a beam for my thesis and I am new to Ansys. If you could send it to me at the below email address I would greatly appreciate it.

dbright4@utnet.utoledo.edu

The minimum number of test

Hi

I have to do the experimental test to study the diaphragm action in lighweight slab. it will be grateful if i find some guideline or some advise about that.

Registration Mimics Innovation Awards 2011 is open

The registration of the 2011 edition of our famous Mimics Innovation Awards is open. So, if you have an interesting research project in which Mimics is used, then you can submit this now! Of course, we reward the winners again with 17,500 Euro in total.

You can participate in 4 categories:

Registration Mimics Innovation Awards 2011 is open

The registration of the 2011 edition of our famous Mimics Innovation Awards is open. So, if you have an interesting research project in which Mimics is used, then you can submit this now! Of course, we reward the winners again with 17,500 Euro in total.

You can participate in 4 categories:

Markus J. Buehler's picture

Postdoc position at MIT: Thermal and mechanical properties of nanocomposites

A postdoctoral associate position at MIT is available immediately,
focused on the analysis and development of multifunctional thermal
management structures, by using theoretical and atomistic multiscale
modeling and simulation. This project specifically involves calculations
of thermal and mechanical properties of graphene based metal- and
polymer nanocomposites, with a focus on various aspects such as
interfacial transport properties, tunability, mutability and phonon
engineering. Additional aspects of the project relate to the general

Abaqus Subroutine and fortran

Choose a channel featured in the header of iMechanica: 

Dear

I have problem with Abaqus 6.10 and fortran 11,0,6 on WIN 7 x64 platform

When I run Abaqus verification it pass all C++ Fortran  requirement but when it check for subroutine for standard case or explicit it has problem:

It is  std_user.log for error

Linking ['std_user.obj'] into user subroutine shared library

Hanqing Jiang's picture

A Thermodynamic Model of Physical Gels

Physical gels are characterized by dynamic cross-linksthat are constantly created and broken, changing its state between solid andliquid under influence of environmental factors.

Experimental notch fracture testing to calculate KII

Hi,

I am doing a v-notch fracture testing (experimental) with opening angles from 0,30,60,90,120 to 150 deg and need to calculate KII. I need a equation that could be used to calculate KII for both 0 deg and also for non-zero opening notch angles. I am using TestResources machine to do this shear testing and I will get results in terms of load vs. d. The material is PMMA. What could be the appropriate displacement/min or load to break the specimen.

poisson's ratio of " graphite ek20 "

 

Dear all

I'm looking for the poisson's ratio of "graphite ek20 ".

Best regards

Dislocation migration in carbon onions

Phys. Rev. Lett. 105, 106102 (2010) 

What does a dislocation look like in a spherical geometry, and how does it migrate in such a structure? We report here the counterintuitive motion of the 1/2⟨0001⟩ edge dislocation in carbon onions from the outer surface to the inner core, i.e. from a low pressure surface to a high pressure core, rather than from the core to the surface as expected due to a surface image force. Maybe you can help us to explain this peculiar phenomenon.

question about UMAT

Choose a channel featured in the header of iMechanica: 

I have read Pro Huang's UMAT for many times and one of its subprogramme I can't understand.

Can anybody help me ?

Normal
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false
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gyanvikash's picture

Fabric Tensor

I am studying the effect of intermediate microfabric on clay's mechanical behavior. In order to develope the constitutive model for clay considering its microfabric, I want to use fabric tensor. If any good paper or study material on fabric tensor is available then please send me.

Thanks

anilshirahatti's picture

Creep Analysis in Abaqus

Hi all,

I want to FEA of normal tensile creep test using Abaqus. Can anyone suggest me some notes/books/literature.

Thanks

Anil

question about abaqus

Hi guys

I want to simulate a problem with abaqus,but during runing of my project,percent of process not increas for axample when i change mesh sizes to biger runing go up to 50 % and when i change mesh sizes to smaller than the previos size,it occure again but in 25%

is there any one that know about this problem,i'm trying to solve it for 2weeks but i cann't.

I'm waiting for your suggestions...

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