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Asymptotics for 1d string/beam immersed into a 2d/3d media

Submitted by esavenkov on
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Dear iMechanicians,

Could someone suggest me the references regarding the following topics:

Consider  a 2d or 3d elastic body with an immersed 1d inclusion.

I am looking  for asymptotics at the inclusion's tips for the following cases:

1. Inclusion is an absolutely rigid beam or string.

2. Inclusion is an elastic string (i.e., there is no bending stiffness).

3. Inclusion is an elatic beam. 

 

Many thanks in advance,

Evgeny Savenkov 

Brief overview of electronic structure calculations

Submitted by Vikram Gavini on
research
education

I am attaching a brief overview of electronic structure theories (ab-initio theories) with emphasis on the various approximations that form a basis for these theories. It also contains references that provide a comprehensive introduction to the field.

An ethnobotanist in the mechanical wilderness

Submitted by Peter Matthews on
research

Hi, I am just making an entry here to introduce myself.

 I am an ethnobotanist studying the origin, domestication, and dispersal of taro, a semiaquatic herb (in nature). My role is historian to the crop, so I try to learn anything and everything I can about the plant, from all points of view.

Watching seeds germinate

Submitted by Peter Matthews on
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Biomechanics Forum
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seeds
germination
growth
biomechnics

Hi,

I have been watching some small seeds germinate on different media.

The root pops out first, from a split in one end of the seed, navigates down to the substrate, then inserts itself into the substrate if it can (e.g. when placed on sand or soil). Otherwise it grows along the surface horizontally (on filter paper). The vertical growing plant also puts out a horizontal set of very fine root hairs, at the ground surface, and then stands up, lifting the seed into the air with the first leaves still stuck inside the seed.

How to combine or embed a link into an area in ANSYS?

Submitted by samueltcw on
research
ANSYS single cell deformation biology

Using ANSYS, I'm trying to create a single 2D cell model that has 3 components - nucleus (represented by a circular area), cytoplasm (represented by a circular area) and cytoskeleton (represented by a line). When I apply a load on the model, the link element of the cytoskeleton does not deformed whereas the rest of the solid elements (nucleus and cytoplasm) deform.  I can't find a function that i can use to glue the line to the area of interest. Does anyone know how to combine or embed a link into an area?

Miniature disk bend testing

Submitted by durgamadhaba on
research
miniature disk bend testing

hii

I  need a bit help in preparing my seminar topic on the subject "Miniature disk bend testing".If anyone can help me out from this problem i will be indebted for life time.

    You can post me the link, sites, any information on my email  id- bapu285 [at] gmail.com.

waiting for a reply.

please help me out from this problem

problem in linking UEL with ABAQUS

Submitted by babak on
research

Dear colleagues

 

I have written a user element subroutine by FORTRAN but when I call it through the ABAQUS (version 6.4), during loading the inp file, an error produces related to FORTRAN compiler (Compaq visual Fortran 6.5) as below:

 

ABAQUS JOB 2

ABAQUS version 6.4-PR11

Begin Linking ABAQUS/Standard User Subroutines

9/8/2008 8:41:40 AM

LINK : fatal error LNK1104: cannot open file "ifconsol.lib"

ABAQUS Error: Problem during linking - ABAQUS/Standard User Subroutines

Need a hand to pull me into the world of XFEM !!

Submitted by priyadd84 on
research
crack propagation
Numerical issues

Dear all,

         I am new to X-FEM, started reading papers a couple of weeks before. I understood, functions[heaviside,sign..] are used to enrich the nodes to simulate virtually the discontinuity and asymptotic functions are used to charecterize the crack tip,other than this regular FEM nodes are there. I have few questions. 

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