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Theme Articles on Aerodynamics, Dynamics and Control of Animal (Insects, Birds and Bats) Flight may Interest you——Published on Acta Mechanica Sinica

Submitted by Acta Mechanica… on

Dear everyone!

Welcome to theme articles on current research progress onaerodynamics, dynamics and control of animal (insects, birds and bats) flight published on SCI-indexed journal http://ams.cstam.org.cn.

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Theme Articles on Aerodynamics, Dynamics and Control of Animal (Insects, Birds and Bats) Flight

Guest editor: Sun Mao

Running a job in abaqus using multiple user-defined subroutine

Submitted by miladbabaei on

Hi everyone,

Im simulating a heat transfer analysis using 2 user defined subroutines (UMATHT + another subroutine (UEXPAN)), looking for a way to run a simple job applying multiple subroutines.was wondering if anyone could help out ,how can i submit e job ?

Regards,

 

Assigning crystal plasticity material constants for one crystal with more than one element (default of Dr Huangs model)

Submitted by Hidroxid on

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

 

Faculty Position - University of Colorado Denver - Mechanical Engineering

Submitted by Chris Yakacki on

The Department of Mechanical Engineering at the University of Colorado Denver (CU Denver) invites applications for a tenure-track Assistant/Associate Professor position starting Fall 2016.

This is an open search with no preferred research emphasis.

More details regarding the position, CU Denver, and life in Colorado can be found here:

how can the plastic strain be greater than unity?

Submitted by student on

Does anyone know how can the plastic strain be greater than unity? Such as in the benchmark manual 3.2.10 Indentation of a crushable foam plate: 

*CRUSHABLE FOAM HARDENING

 0.2000E6, 0.0000

 0.2577E6, 0.0094

 0.2760E6, 0.0258

 0.3053E6, 0.0452

 0.3267E6, 0.0655

 0.3623E6, 0.1084

 0.3891E6, 0.1540

 0.4250E6, 0.2405

 0.4568E6, 0.3812

 0.4738E6, 0.4600

 0.5170E6, 0.6391

 0.5862E6, 0.8570

 0.6503E6, 0.9857

Errors in FRANC3D software

Submitted by Mojtaba1990 on

Hello to all,

My project is crack propagation in expander wheel.

I did static analysis in abaqus and i used FRANC3D for crack modelling.

I insert crack in FRANC3D, surface meshing is done but not volume meshing.

It gave me this error:

backtracking stagnating: restarting contraction

What is this error?

Can anyone help me?

I attach 2 pictures. First picture shows the meshing and another shows crack location.

In crack location i have two seed size of elements because of model geometry.