Blog posts

New publication for UMAT and VUMAT in ABAQUS

Submitted by safaei on Sat, 08/08/2015 - 20:02

We performed a comprehensive study of a large class of Implicit and Explicit integration algorithms for Elastic-Plastic behaviors in Finite Element Analysis (FEA) developed in UMAT and VUMAT for ABAQUS and presented various unique results. We also showed detailed integration algorithms for both Associated and Non-Associated Flow Rules with mixed isotropic and kimenatic hardening with expandable number of internal variables (damage and etc).

Full bibliographic details:

Large anelasticity and associated energy dissipation in single-crystalline nanowires

Submitted by gcheng on Fri, 08/07/2015 - 14:14

research

single-crystalline nanowires

anelasticity

In situ SEM bending test

Guangming Cheng, Chunyang Miao, Qingquan Qin, Jing Li, Feng Xu, Hamed Haftbaradaran, Elizabeth C. Dickey, Huajian Gao & Yong Zhu Nature Nanotechnology 10, 687–691 (2015) doi:10.1038/nnano.2015.135

refine brick / voxel mesh

Submitted by Frank Notts on Fri, 08/07/2015 - 10:52

research

Hello,

Discretising geometries with a brick (voxel) mesh of constant element size is very simple and quick. However, sometimes there are locally small features which would benefit from a more refined discretisation... In my case, the geometry (a textile reinforcement) is complex and tet meshes get very large very quickly – and are slow to generate. Hence, bricks are a simple way forward.

Here are some geometry examples: http://texgen.sourceforge.net/index.php/Main_Page

PhD Position in Computational Multiscale Modelling of Bone Fracture Healing Mechanobiology

Submitted by patrik.christen on Fri, 08/07/2015 - 05:56

job

PHD position

multiscale modelling

bone fracture healing

Cellular Automata

The Laboratory for Bone Biomechanics of Prof. Ralph Müller, Department of Health Science & Technology, Institute for Biomechanics at ETH Zurich is offering a

PhD Position in Computational Multiscale Modelling of Bone Fracture Healing Mechanobiology

Theme Articles on Recent Progress in Mechanics and Thermophysics Research in Fuel Cells and Batteries may Interest you——Published in Acta Mechanica Sinica

Submitted by Acta Mechanica… on Fri, 08/07/2015 - 02:48

Dear everyone!

Welcome to theme articles on recent progress in mechanics and thermophysics research in fuel cells and batteries published in the SCI-indexed journal http://ams.cstam.org.cn.

----------------------------------------------------------------------

Theme Articles on Recent Progress in Mechanics and Thermophysics Research in Fuel Cells and Batteries

Guest editors: F. Ciucci and T. S. Zhao

PhD Position - TU Wien

Submitted by pahr on Thu, 08/06/2015 - 12:08

There is an open position for a doctoral student at the Institiute of
Lightweight Design and Structural Biomechanics (ILSB) of TU Wien (Vienna
University of Technology), Vienna, Austria.
We are looking for a part time teaching/research assistant (full time possible)
in the Computational Biomechanics Group for the next four years. The official job offer is announced at:

https://tiss.tuwien.ac.at/mbl/main/mbl?n=1615 Section 193.4.1

2013 Koiter Medal paper published in JAM

Submitted by Yonggang Huang on Wed, 08/05/2015 - 15:19

The 2013 Koiter Medal paper by Professor Norman Fleck (Cambridge University) is published in the September, 2015 issue of JAM. The paper is attached.

Theme Articles on Aerodynamics, Dynamics and Control of Animal (Insects, Birds and Bats) Flight may Interest you——Published on Acta Mechanica Sinica

Submitted by Acta Mechanica… on Wed, 08/05/2015 - 02:13

Dear everyone!

Welcome to theme articles on current research progress onaerodynamics, dynamics and control of animal (insects, birds and bats) flight published on SCI-indexed journal http://ams.cstam.org.cn.

----------------------------------------------------------------------

Theme Articles on Aerodynamics, Dynamics and Control of Animal (Insects, Birds and Bats) Flight

Guest editor: Sun Mao

Running a job in abaqus using multiple user-defined subroutine

Submitted by miladbabaei on Tue, 08/04/2015 - 20:02

multiple subroutine

abaqus 6.10

Abaqus/Fortran

Hi everyone,

Im simulating a heat transfer analysis using 2 user defined subroutines (UMATHT + another subroutine (UEXPAN)), looking for a way to run a simple job applying multiple subroutines.was wondering if anyone could help out ,how can i submit e job ?

Regards,

Assigning crystal plasticity material constants for one crystal with more than one element (default of Dr Huangs model)

Submitted by Hidroxid on Tue, 08/04/2015 - 15:15

Hi!

I am just a beginner in Abaqus UMAT and I have started working with Dr Huang's crystal plasticity UMAT in Abaqus.

When I am assigning one material constants for one element crystal it works but when I try to assign it to more than one element for one crystal (for example group of elements with same grain orientation) it give me error code 144.

Can anybody explain me the reason?

Thanks in advance,

Kind regards,

Omid

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