Blog posts
Postdoctoral position in Computational Solid Mechanics - School Of Mechanical Engineering Purdue University
A postdoctoral position is available starting Fall 2008 in the area of computational solid mechanics. A successful candidate is expected to have a strong background in multiscale modeling and programming experience. While experience in plasticity using finite element methods or dislocation dynamics is a plus , all outstanding candidates will be considered.
Mat_54_55 (LS DYNA material model)
I would like to know the difference between Effective Strain, Effective Plastic Strain and Effective Failure Strain.
mold filling simulation with flo3d
I want to simulate mold filling of a bar mold with a semisolid alloy by means of FLOW3D cfd package. but there are some problem. for example when I input a file I encounter an error like "level 1 error in subroutine rdstl: level 1 error in subroutine rdstl"in preprocessor. what can I do? does my .stl file have any faults?
other problem with another project is that when i want to solve the problem I encounter an error like "convective flux exceeded stability limit".repeatedly. is my meshing insufficient? how can I solve that too?
Using user subroutine UMAT in abaqus
Hi,
Thanks for the earlier feedback. I was able execute the user subroutine (UMAT) along with *.inp file only to land into new type of error message:
fatal error lnk1112: module machine type 'IA64' conflicts with target machine type 'X86'
Can somebody please help me to understand what this error means and how to overcome this monster.
I have already installed intel fortran compiler, and microsoft visual studio for windows.
As always thanks for the much needed help.
Journal club theme of Aug. 15, 2008: Variational formulations in fracture mechanics
This issue of the journal club addresses a topic deemed classical by most mechanicians: the onset and evolution of fracture in brittle solids. In the last ten years or so a community of mathematicians have been analyzing the formulation of fracture mechanics models. Although still at a very early stage, there is already a substantial body of work, which either sets in a very rigorous settings some known results, or give rise to other perhaps more surprising ones.
Measurements of near-ultimate strength for multiwalled carbon nanotubes and irradiation-induced crosslinking improvements
For more than 15 years, carbon nanotubes (CNTs) have been the flagship material of nanotechnology. Researchers have conceived applications for nanotubes ranging from microelectronic devices to cancer therapy. Their atomic structure should, in theory, give them mechanical and electrical properties far superior to most common materials.
Illegal floating point operation
Can anyone shed some light on this particular error?
ABAQUS Error: The executable /app2/6.6-1/exec/standard.exe
aborted with system error "Illegal floating point operation" (signal 8).
Is there a possible reason for this error as I have gone through my code many times and dont find any suspicious statements that could lead to this error.
This occured when I was running my analysis with a USDFLD and MPC subroutine
Using User Subroutine UMAT in abaqus
Hi,
Iam a new user of abaqus. I have a subroutine written in *.for format. I also have an input file *.inp . Both these programs are in the same folder. When I try to execute the *.inp file using the command
abaqus job=jobname datacheck interactive
I get a message saying "Abaqus/Standard Analysis exited with an error. please see the message file for possible error messages". I looked in the message file and it says ***ERROR: USER SUBROUTINE UMAT IS MISSING.
Then I used the command
abaqus job=jobname user=umat.for