Skip to main content

software

software of interest to mechanicians

Efficient preconditioner for Augmented Lagrangian

Submitted by tlaverne on
Forums
Ask iMechanica
Choose a channel featured in the header of iMechanica
software

Hi folks !

I have a question which is more mathematical than mechanical. However since it is to solve mechanical problem, one of you may have an answer !

I want to solve a non-linear problem with non-linear equality constrains and I'm using a augmented Lagrangian with a penalty regularization term that, as well known, spoils the condition number of my linearized systems (at each Newton iteration I mean). The bigger the penalty term, the worse the condition number is. Would someone know an efficient way to get rid of this bad conditioning in that specific case ?

Managing Risk

Submitted by Anonymous (not verified) on
software
risks

Managing risk can be effectively done with the right software tools. Specifically with enterprise risk management software tools. In mechanical engineering projects, managing such risk is paramount to success and meeting deadlines. Most mechanical engineering students will not study such processes, but in having knowledge of managing risk, you will put yourself on a higher pedestal.

FGM modeling

Submitted by Bensalah cherif on
software
FGM modeling

Hellow

 I am a graduate student on mechanic and I am working on the vibration
of FGM plate.

I try to model the FGM plate with Abaqus, so I need to use the UMAT
Subroutine 

I don’t have big knowledge about Subroutine under Abaqus 

Especially FGM materials

I’ll be thankful if some people give some guide lines about this problem.

Normal
0

false
false
false

EN-US
X-NONE
AR-SA

Computational Study of Cortical Bone Screw Pullout using the Extended Finite Element Method (XFEM) - 2012

Submitted by SIMULIA on
software
finite element analysis
ABAQUS
FEA
Multiphysics
SIMULIA

In this study, using a UDMGINI subroutine, stress components relative to a predefined osteon orientation were computed and an anisotropic damage criterion was used to determine damage initiation and to predict crack propagation.

ABAQUS embedded regions

Submitted by Yasmine.Abdin on
Forums
Ask iMechanica
Choose a channel featured in the header of iMechanica
software

Hello,
 
I am trying to find out if someone has information about the "embedded region" constraint in Abaqus. I am trying to model a very simple short fiber in a matrix (short cylinder inside a block). The model is purely elastic. The problem is, no matter how high I assign the values of the E modulus of fiber, I always get equivalent properties of composite (fiber + matrix) equal to matrix properties.
 

Simulation of the Ballistic Perforation of Aluminum Plates with Abaqus/Explicit - 2012

Submitted by SIMULIA on
software
ABAQUS
Kinematics
Abaqus/Explicit
SIMULIA
This Technology Brief describes Abaqus/Explicit
modeling of the ballistic impact of metal projectiles on metal targets.
It will demonstrate the utility of Abaqus/Explicit as a tool for
reducing the amount of experimental testing as well as assessing the
projectile residual velocities and time-resolved kinematics. 

How to learn user subroutines in ABAQUS by FORTRAN?

Submitted by Lilia Wang on
Forums
Ask iMechanica
Choose a channel featured in the header of iMechanica
software
Free Tags
User subroutines in ABAQUS

I'm a freshman in biomechanic and apply to learn user subroutines in ABAQUS by FORTRAN.

I have installed the ABAQUS 6.11, VS2008 and IVF 11.1.

But I don't know how to call the subroutines in ABAQUS, so I will be very appreciate if someone give me some suggestion or simple tutorials about this.

THANKS!

Subscribe to software