research

EML new article: Tension-induced tunable corrugation in two-phase soft composites: Mechanisms and implications

Submitted by Ahmed Elbanna on Wed, 08/12/2015 - 15:44

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Composites - Tunable channels - Bioinspired

Abstract

plastic energy density in an element

Submitted by monzer on Tue, 08/11/2015 - 23:56

research

Hi every body,

I did an orthogonal cutting simulation and I want to calculate the plastic deformation energy density distribution underneath the tool tip during cutting.

Anyone can give me more informations about this?

Thanks

On the Compatibility Equations of Nonlinear and Linear Elasticity in the Presence of Boundary Conditions

Submitted by arash_yavari on Mon, 08/10/2015 - 04:48

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We use Hodge-type orthogonal decompositions for studying the compatibility equations of the displacement gradient and the linear strain with prescribed boundary displacements. We show that the displacement gradient is compatible if and only if for any equilibrated virtual first-Piola Kirchhoff stress tensor field, the virtual work done by the displacement gradient is equal to the virtual work done by the prescribed boundary displacements. This condition is very similar to the classical compatibility equations for the linear strain.

refine brick / voxel mesh

Submitted by Frank Notts on Sat, 08/08/2015 - 15:26

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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 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,

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 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