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Xinlei_Wu's picture

Periodic displacement loads decompose with 4 load steps in Abaqus

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 I want to simulate a dynamic motion of a pipe under periodic displacement loads.

ABAQUS Subroutine Error

Good day 

I have encountered and Error within Abaqus Cmd prompt after numerous trial and error installations and path designations. Below is a display message retained from the cmd stating every system environment has been passed but stil no abaqus subroutine available?Using Abaqus 6.10 +VS2008+Fortran 11.1 installed in that order. Below is a display message from the prompt. Any suggestions would now be appreciated. Regards

davm5's picture

Impact Force plotting using Abaqus/Explicit

Hello Everyone

I am trying to simulate material dumping process from shovel onto mining dump truck. And for that i am using Abaqus/Explicit.  When i plot the contact force of material falling onto truck body under gravity, it gives me the maximum value of 0.12e+11, where as a simple theoretical analysis shows that the resulting impact force for 100 tons of material falling under gravity should be 9e5 N. I am not been able to understand the reason that why Abaqus /Explicit is exaggerating the impact/contact force so much. And i dont know how to correct this thing.

Abaqus 3d Tunnel model


im making a 3d model of a tunnel excavation and its subsequent settlement using abaqus.

i have made a model in which the tunnel is excavated to a certain section. but my problem is that i cant simulate the progress of excavation. for example a model in which the tunnel gets excavated in 2-meter steps. and in each step 2 meter of soil gets excavated.

i have searched the internet and i think there are plug-ins which can help doing this. can anyone tell me how i can download such plug-ins? or introduce me another way to model the progress of the tunnel excavation?

keyhani's picture

For some educational purposes, I need a 2D Dislocation Dynamics Matlab Code.

For some educational purposes, I need a 2D Dislocation Dynamics Matlab Code. How can I find it?

ADT's picture

WEBINAR - Introducing 3Dlab and New Features for Multi-Disciplinary Optimization in TURBOdesign Suite 6 | 30th September

TURBOdesign Suite is a unique aerodynamic and hydrodynamic 3D design software package that allows users to design, analyze and optimize all types of turbomachinery, such as axial, mixed-flow, or centrifugal pumps, compressors, fans, turbines and torque converters.

Dincoz's picture

Could you tell me know which criteria if satisfied, the abaqus give this error "one of your elements distorted excessively"?

For test reasons of abaqus work, I have defined my material properties (stress-strain behaviour) up to strains of 15! However, even in this condition some of my elements reaches this strain value and distorted. I want to know which calculation the abaqus software is using to report a distortion error? 

Actually can we define our material behaviour in a way that, it would not distorted at all?




Some Linux Commands


This isn't majorly a Mechanics post but I've noticed that a lot of people have started using HPC's (which use Linux OS almost all the time), and Linux OS based desktops. It's slightly difficult for people to begin using linux but once you do there's no turning back. Here I aim to create a Linux Command cheat sheet that one can refer to. Or just have it printed and kept in the lab. 

Most of these were borrowed from but I've added in some more explanations and commands.


Software for composites

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Dincoz's picture

what is the reason for Large element deformation?

Hi my Friends,

I am doing abaqus run for a copper specimen under hydrostatic pressure. The magnetude of pressure is in order of several Giga Pascals. In my material definition, I have defined stress-strain flow up to strain of 0.4. But as you can see in attached photo, some elements show very large deformation (considerably larger than 0.4). Knowing that I have not defined stress strain behaviour for srain greater than 0.4, how this can be occure? Unfortunately, niether adaptive meshing nor element deletation were not eliminate this issue!!


Best Thanks

Frank Richter's picture

Subroutine DFLUX in ABAQUS

Dear Mechanicians,

time and again the question of modeling moving heat sources pops up, often in the context of laser heating.

One can achieve this using the subroutine DFLUX in ABAQUS.

I decided to post some links here to avoid responding with a longer explanation to every individual seeking assistance.

Please note that I have never worked with any one of these codes and have no access to ABAQUS at present.

No warranty is given by me.

Frank Richter's picture

ABAQUS built-in SMA model

Dear Mechanicians,

time and again the question of SMA (shape memory alloy) modeling pops up.

In ABAQUS, you can achieve this only by (V)UMAT coding or by using the little-known built-in SMA model.

In the past I have frequently responded to queries on SMA modeling and could refer to a customer help site of SIMULIA. That site is down, regrettably.

I decided to post the files here to avoid responding with a longer explanation to every individual seeking assistance and uploading the files as E-mail attachment every time.

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Haitao Zhang's picture

Software to simulate injection molding

Appreciate any recommendations for software which can be used to simulate injection molding process in order to identify weakpoints in the molded parts.

dithoap's picture

Characteristic length in ductile damage model in ABAQUS

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Hi All,


I want to model a dogbone specimen made from polycarbonate.

I model it using linear elastic plasticity coupled with ductile damage model.

For the damage, we are going to use the tabular form to described the damage evolution d with respect to equivalent plastic strain epsilon_p.

In abaqus, it is written that we need to input the d with respect of equivalent plastic displacement (u_p) instead of epsilon_p via equation u_p = epsilon_p \times L; where L is the characteristic length.


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Perform a modal based shock analysis in Abaqus

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Hi guys,

I'm a new Abaqus user and I do not know how to perform shock analysis after frequency analysis in Abaqus. Can anyone help me with introducing the procedure or giving an example?

Thank you in advance. :)

Dincoz's picture

Master/Slave surfaces in abaqus, what is the concept?

Could some one kindly explain me what is the advantages of using master/slave surfaces in contact problems? Indeed, when we should use master/slave strategy? Best

Parametric study- PSF file - XY plot

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Dear all,

Dincoz's picture

Element delatation for Severe Plastic Deformation (SPD) process

Dear all,

I am using Abaqus/explicite. My material definition is elasto plastic with stress strain values up to strain of 15!. After borthering tries now I think if I can set "Shear Failure Criteria Element Deletation option", it is possible to avoid this error. But I cannot find this option. Could someone guide me what exactly should I do in order to add distorted element deletation option and how? (an step-by-step tutorial will be approciate)

More Explanation about process:


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