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CZM using interaction module in ABAQUS

Hello everyone,

I am getting a strange bug regarding CZM in ABAQUS. I have discrete joints between two copper bars in a DCB sample. I use the interaction module to model the contact in interface between the joint and copper. The contact works pretty well in some of the joints while no contact forms in some other ones especially the leading joint! It means that seperation happens immidiately after job submission. I would really appreciate if somebody can help me with this.

Thanks,

Amir

Dargazany's picture

PhD position in Mechanics of High Performance (bio)Materials

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 sSummer  or Fall 2015.

About the embedding of cohesive elements between solid elements using Matlab program

Good mouring Imechanica's users, i have a question about the cohesive elements and thier embedding in a finite element mesh, i have a 2D mesh created in Matlab with the Nodes numbering and their coordinates and the elements numbering and their connectivities, all these Datas in vectors and matrices, the element type is a four noded linear quadrilateral elements, the mesh is not regular in general, i would like to embed cohesive elements between some or all elements in the mesh, mean that each element is surounded by cohesive zero thickness elements over all its four edges, so could any one

Webinar: New Features of TURBOdesign Suite 5.2.5 | Wednesday 18th March

In this 1 hour webinar we will show how the new features and enhancements in TURBOdesign Suite 5.2.5 enable turbomachinery engineers to produce breakthrough high-efficiency designs faster than ever before. Two example cases will cover application of the new features to the full design process from preliminary sizing to automatic optimization.

PhD position in computational mechanics at York University @Toronto/Canada

Vacancies exist for high calibre one PhD student to join the Innovative Design and Engineering Analysis Laboratory at York University, Toronto, Canada starting immediately.
The position’s primary area of research will focus on multi-scale material modelling and optimization.

Requirement:
- Strong background in numerical simulations, finite element analysis, and/or computational solid mechanics
- Excellent programming skills and experience with high performance computing
- Proficiency in English, good written and verbal communication skills

In Situ Atomic-Scale Observation of Twinning Dominated Deformation in Nanoscale Body-Centred Cubic Tungsten

In situ atomic-scale observation of twinning-dominated deformation in nanoscale body-centred cubic ​tungsten

By Jiangwei Wang, Zhi Zeng, Christopher R. Weinberger, Ze Zhang, Ting Zhu & Scott X. Mao

Nature Materials (2015) doi:10.1038/nmat4228

ASME 2015 IMECE Abstract Deadline 11:59pm March 9

As the largest interdisciplinary collaboration for mechanical engineering, you need to present your research at IMECE.Submit an abstract to present your paper to more than 4,000 attendees from 75+ countries representing more than 20 mechanical engineering disciplines. Include your research in this cross-disciplinary mix to help shape the technical content of the meeting and actively participate in the dialogue.

ADT Releases TURBOdesign Suite 5.2.5

Latest version of Leading Design for Turbomachinery Suite drastically reduces turbomachinery optimization computational requirements, lower production costs.

Dynamic crack-XFEM

XFEM can be used in Abaqus for static analysis. I would like to use XFEM in implicit or explicit dynamic analysis.

I am using Abaqus version 6.13.

XFEM is allowed with static analysis in earlier Abaqus versions (6.9).

Newer versions have implicit dynamic analysis compatiblity with XFEM.

However, when I define an implicit dynamic step, 

XFEM Crack Growth option does not appear in the Interactions section when 'Initial Step' is chosen. It appears only if a static/general step is chosen.  

Dynamic crack-XFEM

XFEM can be used in Abaqus for static analysis. I would like to use XFEM in implicit or explicit dynamic analysis.

I am using Abaqus version 6.13.

XFEM is allowed with static analysis in earlier Abaqus versions (6.9).

Newer versions have implicit dynamic analysis compatiblity with XFEM.

However, when I define an implicit dynamic step, 

XFEM Crack Growth option does not appear in the Interactions section when 'Initial Step' is chosen. It appears only if a static/general step is chosen.  

ABAQUS and Sizes!!!1

Hi everybody,

I want to model a biological cell, diameter of 10 microns! Then what should be the apporx. size in CAE? I am confused! I got to know that the minimum size of parts should be in mm, is this right. then how to solve the problem.

Thanks in advance

P M G

arnkarthik's picture

Welding defects in Abaqus

Hai everyone,

Yonggang Huang's picture

Professor Christensen published Part III of the failure theory in JAM

Professor Richard Christensen (Stanford University) published Part III of his series of papers on the failure theory.  This is a short, but interesting view-point paper.  The paper is attached (JAM, April issue, 2015).

Giovanni Noselli's picture

Postdoctoral position at SISSA-International School for Advanced Studies

A postdoctoral position is open at SISSA (http://www.sissa.it/) within the research group SISSA-mathLab (http://mathlab.sissa.it/). Prof. Antonio DeSimone (PI of the ERC Advanced Grant 340685-MicroMotility) is seeking a postdoctoral researcher to carry out an experimental activity focused on the study of low Reynolds number micro-swimmers.

Plane stress formulation of hyperelastic material

Hi

I'm looking for good refrences for plane stress formluation of transvesrly isotropic hyperelastic materials (imcompressible). I'm wondering if someone help me and introduce some usefull material about it.

Kind Regards

Ali

D.Rittel's picture

An interesting paper

I came across this very instructive article, so I decided to share it here. 

Enjoy!

ABAQUS - Input file - Definition of nonlinear spring (SPRINGA)

Hello all,

I am currently working at a structural dynamic problem with Abaqus/Explicit. The work involves an impact and in this context the goal is to connect two rigid bodies (with their constraint, mass and velocity field) to each other with a NONLINEAR SPRING; the element used is the so called SPRINGA element.

Using File-->Import-->Model I have imported the input file, which I have previously modified in the following way:

 

*Spring, elset=SPRING-spring, nonlinear

 

0,0

1000,0.002481

Cai Wei's picture

Postdoctoral Position Opening at Stanford University

Prof. Wei Cai at the Mechanical Engineering Department of Stanford University is seeking a postdoctoral researcher to lead a project on the modeling of dislocations in strained semiconductor structures.  The major task of this project is the development of an interface between the Dislocation Dynamics program (ParaDiS) with a general purpose Finite Element Method (FEM) program (such as ABAQUS).  Molecular dynamics simulations may be required to provide physical input to the Dislocation Dynamics model.

Call for abstracts ICCM2015, Auckland, New Zealand: computational limit and shakedown analysis

Dear Colleagues,

We are inviting you to submit abstracts on ICCM2015, Auckland, New Zealand: 

MS-008 Computational Limit and Shakedown Analysis.

 

We are looking forward to your presentations at our symposium.

Best regards,

Canh Le

Mike Ciavarella's picture

rate-state dependent friction in ANSYS

Dear collegues

a quick question:- I am playing with continuum models of Contact (Hertz, Westergaard and so on) and friction laws. However, I prefer for my students to use ANSYS FEM code. In Ansys there is standard Coulomb, rate-dependence but not rate-state (unless one codes some user subroutines). See

https://www.sharcnet.ca/Software/Fluent14/help/ans_ctec/Hlp_ctec_realkey...

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