neperfepx / fepx

Finite element polycrystal plasticity

FEPX - Finite Element Polycrystal Plasticity

Overview

FEPX is a parallel finite element-based elasto-viscoplastic framework for use in modeling large deformations of polycrystalline aggregates. Its primary features are:

• Nonlinear kinematics capable of resolving large strains and large rotations
• Anisotropic elasticity based on crystal symmetry
• Anisotropic plasticity based on rate-dependent slip restricted to dominant slip systems
• State variable evolution for crystal lattice orientation and slip system strengths

Installation

Installation instructions for FEPX are provided in the documentation included in the distribution or available here.

fepx's Issues

some issues with fepx installation

I have installed the fepx-1.1.1. My system already has neper-4.1.2. But while checking fepx installation status, it shows Failure to open 'simulation.msh' file. What shall I do? I am just fresh in this field but wanted to learn it thoroughly. Can somebody help?

Unable to run example 1

I am in the process of learning to use FEPX. When I tried to run example 1, an error occurred.
The neper -S command prompts that the file cannot be read.

Can't run my own simulation file

Hi, I am having trouble getting FEPX to run on some simple models I made through Neper. I have copied a simulation file, edited it, and then moved it into the directory with my Neper model.
I open ubuntu and made sure I was in the correct folder, then type 'fepx' in ubuntu to run the program without a job scheduler.
I end up with an Error: 'IO Failure to open post.force.' I also notice that the Elt number is 0 when the mesh file contains 2197 elements.

It also printed blank result files for the outputs I requested.

If anyone has any suggestions, I would highly appreciate them.

Thank you,
Richard

Bug: No crystal orientation output

In example 1, when the number of crystal grains is modified to 1, and the ori result is output in the post-processing. I found that the ori results are all 0, even if the initial grain orientation is not 0. This is a bug found in the latest version 1.2.0, but there is no such bug in the previous version.