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refine brick / voxel mesh

Submitted by Frank Notts on
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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

Large anelasticity and associated energy dissipation in single-crystalline nanowires

Submitted by gcheng on
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
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

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

Submitted by Hidroxid on
research
Crystal plasticity
CPFEM UMAT Dr Huang
ABAQUS UMAT

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

 

CTE: coefficient of thermal expansion - Secant Method - Ansys

Submitted by augustus on
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CTE
thermal expansion
secant
ansys

Hello,

 

I have to perform a thermo-mechanical simulation in Ansys WB and I have to provide the cte of a material.

I have few experience with thermo-mechanical simulation.

I have got a document with the material properties of this material; there I have the Tg (glass transition temperature)

and two coefficients: cte1 (below Tg) and cte2 (above Tg).

 

-->  How should I calculate the CTE for a temperature range (e.g. -50 < Tg < 300) ?   <---

 

Dynamic response and localisation in strongly damaged waveguides

Submitted by Giorgio Carta on
research
elastic periodic structures
dispersion
band-gaps
localisation
asymptotics
damage

In this paper, we investigate the formation of band-gaps and localisation phenomena in an elastic strip nearly disintegrated by an array of transverse cracks. We analyse the eigenfrequencies of finite, strongly damaged, elongated solids with reference to the propagation bands of an infinite strip with a periodic damage.

Can an elastic rod attain self-encapsulation when loaded transversally at midspan?

Submitted by Davide Bigoni on
research
Elastica; buckling; large deformation; deployable structures; growth

Can an elastic rod attain self-encapsulation when loaded transversally at midspan?

The elastic rod assumes the form of a liquid drop at self-encapsulation!
Enjoy the dripping of an elastic rod at http://www.ing.unitn.it/~bigoni/dripping.html

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