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VUHARD for material subroutine and abaqus 6.13.1 requirements

Submitted by aayusha on Fri, 12/19/2014 - 21:15

Hi all,

I am new at subroutine and abaqus requirements and its compatibility. I am trying to use a subroutine VUHARD for the material modeling of polycrystalline material under shock loading. I am not sure if I can use VUHARD because of my lack of experience in subroutines. I have couple of questions listed below and I would really appreciate if anyone can give me a insight in this subject.

1) Can I use visco-plastic formulation (rate- dependent) in VUHARD?

How to specify anisotropic orientations for every elements of a set on Abaqus INP file

Submitted by villardp on Fri, 12/19/2014 - 17:09

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Biomechanics Forum

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Dear Abaqus user,

How the Ancient Romans Made Better Concrete Than We Do Now

Submitted by tlaverne on Thu, 12/18/2014 - 15:26

Could be of interest for some of you.

http://io9.com/how-the-ancient-romans-made-better-concrete-than-we-do-1…

Kind regards,

Thomas Laverne

Simulation and Modeling Engineer

Schlumberger

Adaptive periodical representative volume element for simulating periodical postbuckling behavior

Submitted by Bin Liu on Thu, 12/18/2014 - 08:07

research

Buckling and Post buckling

Finite element method (FEM) with fixed representative volume element (RVE) encounters some difficulties in simulating the periodical postbuckling behaviors of infinite long beam or infinite large film on soft substrate under compression, because the wavelength and pattern of buckling are not known before simulation and will change with the increase of compression strain.

How to specify anisotropic orientations for every elements of a set on Abaqus INP file

Submitted by villardp on Tue, 12/16/2014 - 18:30

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Dear Abaqus user,

SIF semi-elliptical crack in pipelines

Submitted by Nelver Sánchez on Tue, 12/16/2014 - 17:07

research

Dear all,

I am working in my under-graduate thesis. Basically, i'm trying to calculate the SIF and J-Integral for semi-elliptical surface crack using CINT command in ANSYS APDL (all of this in a pipeline model). I have seen one paper shows SIF's distribution along the crack front like the following picture (fig. 8):

In my analysis I have obtained the following distribution (I have used a/c=0.5 with a/tc and tc/Rc equal to the fig. 8):

Microstructurally based cross-slip mechanisms and their effects on dislocation microstructure evolution in fcc crystals

Submitted by ahmed.hussein on Mon, 12/15/2014 - 20:39

dislocation patterning

strain hardening

Three newly identified cross-slip mechanisms from atomistic simulations of fcc crystals, namely surface, bulk and intersection cross-slip types, were hierarchically informed into discrete dislocation dynamics simulations. The influence of each cross-slip type on the evolution of the dislocation microstructure in face-centered cubic microcrystals having different crystal sizes and initial dislocation densities was investigated.

Smeared Crack and Cohesive zone modeling of concrete in ABAQUS

Submitted by ram.jsk on Mon, 12/15/2014 - 07:25

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Fracture Mechanics Forum

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abaqus fracture toughness modelling

Can anybody help me in using smeared crack and cohesive zone modeling in concrete for different grades. I was actually facing problem in using the same to identify fracture parameters of concrete using ABAQUS. I will also be helpful if anyone let me know about an alternate method to find fracture parameters of concrete using ABAQUS apart from using models. Thanks in advance.......