Welding workflow

This workflow implements a case runner for the thermomechanical simulation of a V-Groove welding process based on the user specifications input files.

In this workflow, which is implemented in Swift:

• The geometry and mesh is generated using Salome platform (version 8.2.0)
• The generated mesh by salome is converted to CalculiX format using CalculiX GraphiX (cgx) and unical.
• The thrmomechanical simulation of the welding process is performed with the open source CalculiX FEA solver (version 2.12)
• Post-processing is performed using ParaView and a python library developed by Parallel Works for automated generation of output images and metrics extraction.

This repository contains the modules for automatically creating the files required for simulating a welding case by CalculiX. The workflow involves the following steps:

• Calculate the weld pass coordinates based on user inputs (calcArcPasses)
• Create geometry and mesh (unv) files using Salome. In this step the user defined file for defining the weld heat source, dflux.f, is also created (runAutoMesh)
• Convert unv mesh files to CalculiX/Abaqus input format using cgx and unical (runCGX)
• Create CalculiX analysis files and the based on user inputs (createAnalysisFiles)
• Compile CalculiX with the user defined file for weld heat source, dflux.f (complileCcx)
• Run CalculiX (runCCX)
• Post-process results using ParaView and a python library (runMex) The steps of the workflow are detailed in docs/Instruction_flow.pdf.

Instructions

Running the workflow from on Parallel Works platform

To run the workflow in Parallel Works, upload/select the input files in the input form. The input files specify:

• Geometry, materials, type, ... (e.g., eweld.in)
• The power and speed of each weld pass (e.g., eweld_weld_parameters.in)
• Boundary conditions, i.e., fixed points and directions (e.g., see eweld_boundary_condition.in file)
• Preheat and interpass temperatures (e.g., eweld_boundary_condition.in file)

Sample input files under inputs/long_run directory (for larger jobs), and under inputs/test_run directory (for fast running tests).

Running the workflow from command line:

The main swift script for the welding model workflow is welding.swift file.

• Before running the workflow, start the coaster service via pworks command with two workers:

  pworks cluster 2 
  

• To run the welding.swift workflow, run this command from the workflow directory:

  swift welding.swift