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dphull's picture

Underwater Soil Mechanics Problem

Fri, 2016-08-05 22:31 - dphull
education
discrete element method
soil mechanics
underwater
engineering
undergraduate education

I am an undergraduate student conducting a research project involving the design of a tool to aid astronauts to perform experiments on lunar surfaces and would like to request some direction about which analytical tools would be best suited for this application (i.e. FEA or DEM software/techniques). The specific scenario of interest is to design a tool that can act as an anchor in a sand-like medium (regolith) on the surface of the moon.

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defining a time dependent elastic modulus

Mon, 2016-07-18 03:55 - gna
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education

Hi,

I'm working on a model with Abaqus and I face a problem. One of my materials has an elastic modulus which isn't constant according to time. As I search I found out that this should be done by USDFLD subroutine. I'm not familiar with subroutins and how to write them and all the resourses that I've found just confused me more. I would be grateful if someone helps me.....

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Invitation to Hybrid Films to Human Skin: The Relationship between Structure, Processing and Function

Mon, 2016-07-11 03:49 - hashina
education

 

Dear All,

 

I would like to invite fellow bloggers in Singapore to a Singapore University of Technology and Design (SUTD) Engineering Product Development (EPD) Lecture Series talk titled: 

Hybrid Films to Human Skin: The Relationship between Structure, Processing and Function

presented by Professor Reinhold H. Dauskardt (Stanford University), on Tue, 12 July 2016, 3:00pm – 4:00pm Singapore Time, SUTD Lecture Theatre 1 (1.102).
  

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Newton Raphson for FEM

Wed, 2016-07-06 09:32 - AnnaK
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Computational Mechanics Forum
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education
Free Tags: 
FEM
Newton Raphson
tangent matrix

Hi,

I am currently working on a FEM  2d plane strain elastic model in matlab. The next step would be to use a non linear constiutive law (Mohr-Coulomb). As far as I have been reading non linearities, are solved with iteration schemes. My question is how to compute the tangent matrix with the N.Raphson method? I have seen only case for polynomials, but not for matrices.

Regards!

Anna

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bangjianli's picture

Looking for further learning opportunities

Tue, 2016-07-05 06:25 - bangjianli
education

I am a PhD candidate at Shanghai Jiao Tong University, China.

My research intrest is Digital Image Correlation (DIC).

I am looking for the opportunities for further study.

My email: libangjian#sjtu.edu.cn

Thank you for considering my request.

All the best to you.

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Discrete Element Modelling (DEM)

Sun, 2016-07-03 13:11 - Debojyoti Basu ...
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Can I use DEM using Abaqus 6.14?? If yes how?? 

Thank you

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rajan_prithivi's picture

Large Deformation - Definition of total work energy density

Thu, 2016-06-30 17:54 - rajan_prithivi
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Free Tags: 
large deformation
energy density
Computational Plasticity
continuum mechanics

Like we have the elastic strain energy density for small deformations  defined as 0.5* σ :e  .

Is the equation PK2:E valid for the total work energy density for elastoplastic regimes ? If not, what would be a valid equation for total energy density ?

How can we decompose total work density into elastic work and plastic work densities for a large deformation case.

Where,

PK2 is the second piola kirchoff stress tensor

E is the Green-Lagrange strain tensor

 

Thanks,

Prithivi

 

 

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shreeram111's picture

Plane_Stress, Plane_Strain and 3D - Simple doubt..

Wed, 2016-06-29 05:26 - shreeram111
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Computational Mechanics Forum
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education
Free Tags: 
applied mechanics
FEA
plane stress
plane strain
model simplification

Hello everybody,

 UPDATE :   Question can be deemed as closed.. :)

                       I have a very simple doubt in 3D model simplification. I believe plane stress and plane strain conditions are the two extreme states to simplify a 3D model to 2D case.

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Transfroming applied tractions into statically equivalent nodal force BC

Sun, 2016-06-26 00:41 - MithilKamble
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Hello,

I am trying to produce results for problems with analytical solution to validate my FE code. One of the problmes is the classical plate with a hole configuration with tractions applied at boundaries. However, presently, I can only impose BC in terms of nodal forces and displacements. Therefore I must transform the applied stress in statically equivalent nodal forces.

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jenda_z's picture

Modeling of Localized Inelastic Deformation 2016 (LID 2016)

Sun, 2016-06-19 18:09 - jenda_z
education
localization
Computational Plasticity
CDM continuum damage mechanics
nonlocal formulation

Dear colleagues,

on behalf of the course organizer, I would like to bring to your attention to the advanced course on Modeling of localized inelastic deformation that will be taught by Milan Jirásek in Prague, Czech Republic on 19-23 September 2016.

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Simpleware at Hartree Summer Schools 2016: Week 2 - Engineering Simulation

Thu, 2016-06-02 07:05 - Simpleware
education
simpleware
hartree
UK
warrington
HPC
simulation

Dates: June 27 - July 1, 2016

Venue: The Hartree Centre, STFC Daresbury Laboratory, Warrington, WA4 4AD, UK    [Directions]

School Leaders: Lee Margetts (University of Manchester), Anton Shterenlikht (University of Bristol), and Llion Evans (Culham Centre for Fusion Energy)

Registration Fee: £150

Simpleware are contributing to this event.

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h.yazdani's picture

PhD and Master’s Positions in Civil and Materials Engineering at Howard University, Washington, DC

Tue, 2016-05-31 23:05 - h.yazdani
education
Civil and Environmental Engineering
Design and Optimization
advanced materials
additive manufacturing

The Sustainable Infrastructure, Geotechnics, and Materials (SIGMa) Lab at Howard University, Washington, DC invites applicants for two PhD and one Master’s positions in geotechnical and materials engineering for Fall 2016 and Spring 2017. Highly-motivated, industrious individuals with strong computational and/or experimental skills, journal/conference publications, excellent English proficiency, and the ability to work both independently and as part of a collaborative team are strongly encouraged to apply.

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Theocharis's picture

IIMEC 2016 summer school on "Advanced Material Systems: Experimentation and Modeling"

Wed, 2016-05-18 19:45 - Theocharis
education

On behalf of the International Institute for Multifunctional Materials for Energy Conversion (IIMEC) and the Department of Mechanical Engineering at Aristotle University of Thessaloniki, we would like to announce a summer school on Advanced Material Systems: Experimentation and Modeling. The summer school will be held from July 3–9, 2016 on the Aristotle University campus in Thessaloniki, Greece. 

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Pressure Difference Calculation in ABAQUS

Mon, 2016-04-25 02:29 - MDaftab
education
coupled eulerian lagrangian
pressure difference
ABAQUS

Hi everyone, 

I am working on ABAQUS to simulate Pipeline Inspection Gauge (PIG) movement in a pipeline via CEL technique. I am unable to find how to calculate Pressure Difference in the pipeline using Abaqus.

If anyone of you can guide me through it.

Regards,

MD Aftab

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Simplified slip-bearing action by using stop ellement in Abaqus

Thu, 2016-04-14 13:49 - Mona20016
education
ABAQUS

Hi
can anyone please advise me to define connector ellements with following details:
Using rigid plastic CARTESIAN element and a STOP element in parallel and The connector behaviour must be:
1- rigid up to the slip force limit Rn
2- slip at the bolts up to ±1 mm at constant force Rn
3- rigid bearing hardening

 

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Summer School - HPC for Engineering Simulation

Thu, 2016-04-14 04:21 - Lee Margetts
education
ParaFEM
High Performance Computing
Cellular Automata
stochastic FE analysis
summer school
x-ray tomography

The STFC Hartree Centre (in Warrington, UK - located between Manchester & Liverpool) is running 4 high performance computing summer schools from June to July 2016. They are primarily aimed at PhD students and postdoctoral researchers, but are also open to academics and industry at no extra cost. The tuition fees are subsidised by STFC and each week only costs £150. There is a 1 week school on each of the following topics:

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Dargazany's picture

PhD position in Mechanics of High Performance (bio)Materials

Wed, 2016-03-16 14:35 - Dargazany
education
PhD job position mechanics composites

Our Group of High Performance Materials in Enviormental & Civil Engineering Department at Michigan State University has an openings for PhD positions to work on Multiscale Modeling of Soft Materials starting Fall 2016.

 

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Simple Physics concepts

Thu, 2016-03-10 23:47 - BOBBY RENJAN MATHEW
education

Hello......

    I have a small doubt. It may feel silly, but please reply.. 

   Suppose I have a pendulum and it is impacting onto a structure. The mass of pendulum is 'm' and the intiial velocity is 'v'. The condition is that the KE at the time of impact should be 'E'. E= 0.5*m*v2 . 

  Now i change the mass of the pendulum to m1 correspondingly velocity should be changed to v1 so that E1=E.

 Now i need to compare the force transmitted to the structure. F = ma. 

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Welding analysis with Abaqus

Thu, 2016-03-10 17:42 - JGalovic
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Hello everyone,

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7th Summer School on Biomechanics of Soft Tissues: Multiscale Modeling, Simulation and Applications

Wed, 2016-03-09 11:19 - Gerhard Holzapfel
education
biomechanics
summer school

7th Summer School on Biomechanics of Soft Tissues: Multiscale Modeling, Simulation and Applications
Graz University of Technology, Austria
July 4 - 8, 2016

coordinated by:
Gerhard A. Holzapfel, Graz University of Technology, Austria
Ray W. Ogden, University of Glasgow, UK

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kourousis's picture

PhD position in Additively Manufactured Metals Plasticity (Extended Deadline: 17 June 2016)

Sat, 2016-02-27 17:45 - kourousis
education
Funded Phd Positon
Computational Plasticity
Plasticity
additive manufacturing
Constitutive model

PhD Studentship (4 years) @University of Limerick

Cyclic Plasticity of Additively Manufactured (AM) Metals: Experimental Investigation & Constitutive Modelling

Background & Research Objectives

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