Python scripting in ABAQUS Part1

Users ask these questions

In social media, users asked questions regarding Abaqus scripting issues, and we answered a few of them; you can see them below.

I. Using Python code to define a path and extracting XY data

Q: Good day, everyone! I need to extract XY data along the central area of an element subjected to heat transfer (steady-state analysis). In particular, I’m attempting to extract heat flux components and nodal temperature at the nodes indicated in the attached diagram. The mesh is built on a partition of a part, with each partition having a distinct thermal conductivity. The purpose of this exploratory investigation is to figure out what the smallest area with the maximum thermal conductivity value (the “green” area in the image) is for which the heat flux can be considered 1D. As a result, I’m attempting to plot the heat flux against the node distance within the considered element.

Because the mesh is dependent on the object’s dimensions, and these dimensions – the unknown variables – were parameterized using python macros, I’d like to know how to utilize a python function to extract the same path as seen in the figure as the size of the “green” area varies. The number of elements varies as well (the mesh is determined by element size, not by the number of elements), therefore the node labels change. Please accept my thanks in advance for your response.

A: Hi, I hope you are doing well. Actually, I have seen your work and done something like this before. It could be a little complicated. However, if you know how to use python, it would be easy. Thus, I recommend you refer to the following links: Python scripting in ABAQUS Part1 and  Python scripting in ABAQUS Part 2

Here, you can learn python from beginner to advance. Also, an example like your problem is in it as well. I hope it will help you with your current problem and future problems.

II. Creating a specific geometry in Abaqus

Q:

I want to simulate a bent tube in ABAQUS with continuous linear function thickness and diameter variations from one end to the other. To help you comprehend the question, I’ve attached a sketch.
Mesh definition, surface definition, and boundary condition specification are crucial since later on I want to hydroform it into an even more intricate shape. For modeling programs like SolidWorks, CATIA, or ProE, it is not a problem, but importing parts from them is a mess. Even if the import is somehow successful, meshing, surface interaction definition, and BC defining are challenges. Therefore it would be fantastic if I could directly simulate it in ABAQUS.

I attempted to use the 3D/Shell deformable sweep command, but it just requested a sweep geometry and then continuously swept the geometry along the stated path, when I wanted to linearly alter the thickness and diameter.
Is it possible to carry it out?

A: Hi,

You should write a Python script to sweep this or create any other geometry that has something like this. If you need any tutorial videos for scripting, I suggest checking the link below. It will help you with your current problem and future as well.

Python scripting in ABAQUS Part1

Best regards.

III. Post the running status through email

Q: Hi All,

I am running very big Analysis 16 hours & i need intimation the through email for running status file.(.status).

Whether 50 % or 80% for completion. I need any python code & how to define cae side email notification.

Please share the your comments or Answer ..

 Thanks,

A: We have the python code in our scripting package that sends emails to users about simulation status.

IV. Importing data from MATLAB to ABAQUS

Q: Hello, I have a dataset with x,y,z point coordinates from a CMM surface measurement. How can I process the surface dataset in Matlab and then export and define it as the beginning surface of a body in ABAQUS so that I can do a mechanical analysis on it? Is it necessary to export the surface data as mesh in whatever format? The contour residual stress analysis is my primary goal.
Thank you in advance for your response.

A: Hello,

If I’m not mistaken, you are talking about point cloud. First, you should import this dataset to software like CATIA and form your model with this point cloud. Then, import this created model to the ABAQUS and do whatever you want with it.

V. Python scripting

Q: Hello, I need help getting a code in python or Fortran for elastic stiffness to calculate the shear modulus at varying mean effective stress by the Hardin formula in Abaqus. Can anyone help regarding this, or else from where I can learn to code?

Regards.

A: Hello,

First, you need to determine the equations you want to implement in your coding to decide which one is suitable for your work, python or Fortran.

Second, if you do not have enough knowledge of how to write python code or Fortran, I recommend checking the links below. These will teach you professionally python coding and Fortran to get what you need for your current and future problems.

Python scripting in ABAQUS Part1

this one is for python.

Introduction to USDFLD and VUSDFLD Subroutine

UMAT Subroutine (VUMAT Subroutine) introduction

and these two are suitable for Fortran according to your problem.

VI. Python scripting in Abaqus

Q: I’m using Python to operate the Abaqus GUI and create an RVE with PBCs. There is no interphase or interface material because the material is an Ox-Ox CMC. I’ll have to delete some of the elements to indicate porosity.
Is there anyone who has done something similar before?

A: Hi,

If your problem is geometrically and you want to know how to use python to model this composite, I suggest referring to the links below. You can learn a lot about python. You won’t regret it.

Python scripting in ABAQUS Part1

Python scripting in ABAQUS Part 2

Just remember, you must know the relations needed for the modeling.

If your problem is to define material properties, I recommend using UMAT and VUMAT subroutine. You can refer to this link:

UMAT Subroutine (VUMAT Subroutine) introduction

Again, you need to know the equation of the composite material properties.

Best wishes.