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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