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ABAQUS error

Hello everyone,

I am modelling a three dimensional cohesive element problem with Abaqus. I was wondering to see if anyone had the following error in their analysis:


Fifth Biennial Workshop on Direct Methods

The fifth biennial workshop on 'Direct Methods' will be held in Oxford, UK on 6th to 8th September 2015.  It follows on from previous successful workshops held in Aachen, Lille, Athens and Reggio Calabria (see ).

Fifth biennial workshop on Direct Methods

The fifth biennial workshop on 'Direct Methods' will be held in Oxford, UK on 6th to 8th September 2015.  It follows on from previous successful workshops held in Aachen, Lille, Athens and Reggio Calabria (see ).

3D FEA of stress concentration

Dear all,


I am simulating tensile specimens with an elliptical pore(representing a flaw in the material) in the mid-cross section of the specimen. What I am looking for is the stress concentration caused by this pore.

I am simulating this as a 3D specimen under tensile loading only, with 3D, 8-node linear brick elements(1st order). Now my questions are:

1- Is there any analytical solution for such problems(3D with elliptical pore) with which I can compare my FEA results?

Two PhD positions available at the Department of Petroleum Engineering, Texas A&M University

<p>Two PhD positions are available at the Department of Petroleum Engineering, Texas A&amp;M University in the area of characterization and micromechanical modeling of organic-rich shales. Candidates should have a BS or MS degree in civil engineering, mechanical engineering, petroleum engineering, material science or other related areas. Candidates with background in experimental and modeling of porous materials are highly preferred.

Characteristic impedance of a tube

Hi all,

I need to calculate the characteristic (or specific) impedance of a tube. Generally this tube has a varing cross-sectional area (diameter changes and it has tube is not cylidrical). However for a very simplified case, let's assume it is a perfect cylender terminated at a finite length. The walls and termination are not rigid so it will have interaction with acoustic pressure inside.

S. Thuillier's picture

PhD position in France, with ESI Group

Virtual forming of metallic sheet materials: prediction of forming and in-life behaviors within an integrated approach

Stephan Rudykh's picture

Call for abstracts IMECE-2015: 12-19 Mechanics of Biological Materials and Structures; 12-14 Wave Propagation in Soft Materials

Dear Friends and Colleagues,

We would like to invite you to submit an abstract to our symposia at the ASME IMECE November 13-19, 2015 in Houston, Texas

Our symposia are:

12-14 Wave Propagation in Soft Materials

12-19 Mechanics of Biological Materials and Structures


We look forward to your presentations at our symposia!


Stephan Rudykh

Sulin Zhang's picture

Journal Club Theme of March 2015: Mechanics of 2D Solid and Fluid Crystals


Sulin Zhang, Pennsylvania State University

Hongyan Yuan, University of Rhode Island


Xiaohan Zhang's picture

A single theory for some quasi-static, supersonic, atomic, and tectonic scale applications of dislocations

Xiaohan Zhang             Amit Acharya                Noel J. Walkington              Jacobo Bielak

We describe a model based in continuum mechanics that reduces the study of a significant class of problems of discrete dislocation dynamics to questions of the modern theory of continuum plasticity. As applications, we explore the questions of the existence of a Peierls stress in a continuum theory, dislocation annihilation, dislocation dissociation, finite-speed-of-propagation effects of elastic waves vis-a-vis dynamic dislocation fields, supersonic dislocation motion, and short-slip duration in rupture dynamics.

Yong Zhu's picture

IMECE 2015 Symposium on “Mechanics of Adhesion and Friction”

Dear Colleagues,

We would like to invite you to submit an abstract to the symposium on Mechanics of Adhesion and Friction (Track 12, Topic 3), ASME-IMECE 2015, Houston, TX, Nov. 13-19, 2005. The submission deadline is March 2, 2015. Confirmed invited speakers this year include Yonggang Huang (Northwestern University), Shu Yang (UPenn) and Kevin Turner (UPenn). 


vicky.nguyen's picture

Submit abstract to Mechanics and Materials for Biology and Medicine, IMECE 2015 - Deadline March 2, 2015

We would like to invite you to submit an abstract to:


Mechanics and Materials for Biology and Medicine

IMECE 2015.  

November 13-19, 2015 

Houston, TX, USA


Siva P V Nadimpalli's picture

Abstract deadline for IMECE symposium on Mechanics of Deformation and Failure of Energy Materials is March 2, 2015

Dear Colleagues,

Just a gentle reminder that the deadline for abstract submission is March 2, 2015. Please consider submitting an abstract to the symposium titled “Mechanics of Deformation and Failure of Energy Materials” at the IMECE 2015, Houston, Texas, November 13-19, 2015. 

Post-Doctoral Research Associate

Research Associate in Experimental Biomechanics
Newcastle University - School of Mechanical & Systems Engineering
Location: Newcastle Upon Tyne
Salary: £28,695 to £30,434
Closes: 25th March 2015
Job Ref: D1704R (MSE)

Helps needed for Mixing of granular media in a drum mixer

Hi everyone,

I just realized there is a DEM feature built in ABAQUS. A drum mixer example is given in user manual. but i still cannot figure out how to do it like how to creating a number of discrete elements, defining their locations, and so on. 
Could anyone offer me any tips, or any tutorials which can be hardly found online

Thanks in advance.

Call for Abstracts-ASME McMAT 2015: Symposium 10: Fundamental Biomechanics and Biomaterials Invention for Translational Medicine

Dear Colleagues, 

We are inviting you to submit abstracts on ASME McMAT 2015: Symposium 10:

Fundamental Biomechanics and Biomaterials Invention for Translational Medicine.


Postdoctoral Fellow at the University of Pittsburgh

Applications are invited for a 2 year Postdoctoral Fellow in Dr. Andrew Bunger's group at the University of Pittsburgh Department of Civil and Environmental Engineering. The group conducts research in geomechanics with an emphasis on mechanics of hydraulic fractures and poromechanics of rocks.

Technical Discussion

Good aftrnoon to all,

i am new to ansys apdl,so kindly help me with this problem.

i am running linera static analysis for landing skid skid of helicopter but on solving i m getting error like a small negative equation solver pivot term has been encountered at UX degree of freedom.

what is the meaning of this error & how to tackle this?



Sushant Zutshi


The Department of Aerospace Engineering at the Indian Institute of Technology, Madras is seeking to fill Assistant Professor vacancies in the following research areas.

1) Experimental Structural Mechanics/ Composites
2) Aircraft Aerodynamics (experimentalists preferred)
3) Control and Flight Mechanics of Aerospace vehicles
4) Aircraft Design (aerodynamic/structural)

Apply online at by 27th March, 2015.

Problem in printing out the global stiffness matrix

Hi everyone,

I'm using UEL in ABAQUS. My model just has one 4-node element (defined in UEL) fixed in one end. When I'm running the UEL, it's working without any problm. But when I' trying to print out the global stiffness matrix I'm getting this error: "aborted with system error code 1073740940".

This is the way that I'm trying to print it out:


How to define a specific time active force curve in Abaqus

I was trying to create a load curve associated with time, such as a sine curve at the beginning, and then the force vanishes. Therefore, I cannot just use the periodic curve directly. I tried to input two loads periodic sine curves(same step) so that at a later time like t_0 the total load is cancelled. But it seems the displacement reaction is kind of weird. Is this the right way to do this kind of load-time curve, or is there another better way? Thanks a lot.


why i got different geometry shape in ABAQUS viewer / import part

Hi everyone,

I was trying to export a deformed geometry from ABAQUS. So, I chose a method found online which is using CAE to import the ODB file, i.e. File -- Import -- Part -- File Filter -- Output Database option and specify the deformed shape and then save it as an input file. 

However, what I got by importing the ODB is different with that shown in the simulation result. Could anyone tell me why is that? And How could I get a correct deformed geometry.  



shahram's picture

Looking for Postdoc position in UK, USA or Canada

My PhD in  Mechanical Engineering Dept. of Middle East Technical University, Turkey ended by Dec. 2014. In both M.S. and PhD I studied the numerical analyses of metal forming processes with ABAQUS together with huge experimental works. I have a patented idea in hydroforming of sheet metals in my M.S. and also I have developed a Ductile Fracture Criterion during my PhD which means I have a robust background of computational mechanics.

Looking for Research/Postdoc Opportunity.

Dear Fellow Members,


I am currently pursuing my PhD research under the supervision of Prof. Ralf Müller at the Institute for Applied Mechanics, TU Kaiserslautern, Germany. I have submitted my dissertation on October 2014. And expecting to defend my PhD work on March, 2015.



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