PreVABS

PreVABS is a preprocessing tool for VABS and SwiftComp. It helps users to create cross-sections and write input files.

Installation

Windows

Portable (prevabs-<ver>-windows-portable.zip)

• Unzip the package
• Add the root directory to the system environment variable PATH

Usage

prevabs -i <main_input.xml> [options]

Options

Analysis options
----------------

-h      Build cross section and generate VABS/SwiftComp input file for homogenization.
-d      Read 1D beam analysis results and update VABS/SwiftComp input file for dehomogenization.
-fi     Initial failure indices and strength ratios.
-f      Initial failure strength analysis (SwiftComp only).
-fe     Initial failure envelope (SwiftComp only).

Format and execution options
----------------------------

-vabs   Use VABS format (Default).
-sc     Use SwiftComp format.
-int    Use integrated solver.
-e      Execute VABS/SwiftComp.
-v      Visualize meshed cross section for homogenization or contour plots of stresses and strains after recovery.
-debug  Debug mode.

Build from source

Requirements

• Compiler
  • C
  • C++ (11)
  • Fortran (required to link to VABS shared library)
• CMake 3.0 or higher
• Libraries
  • boost
  • blas/lapack
  • gmsh sdk

Linux

1. Unpack the PreVABS package and change the directory to the package root. In the following steps, <PREVABS_DIR> stands for the absolute directory of the package (/.../prevabs-<version>-source).

   tar -xzvf prevabs-<version>-source.tar.gz
   cd prevabs-<version>-source
   

2. The default compiler is GCC. To use a different compiler, open the file build_all_linux_64.sh and edit the compiler options -DCMAKE_C_COMPILER, -DCMAKE_CXX_COMPILER and -DCMAKE_Fortran_COMPILER (there are two places for this setting, one for Gmsh and the other for PreVABS).

3. Run build_all_linux_64.sh.

   ./build_all_linux_64.sh
   

4. Add <PREVABS_DIR>/bin to the environment variables PATH and <PREVABS_DIR>/lib to LD_LIBRARY_PATH. You can also move files in these locations to proper directories in your system.

   export PATH=<PREVABS_DIR>/bin:$PATH
   export LD_LIBRARY_PATH=<PREVABS_DIR>/lib:$LD_LIBRARY_PATH
   

Windows

Environment: Visual Studio

• Step 1: Setup Boost
  • 1.1 Download from https://www.boost.org/users/download/
  • 1.2 Unzip the package to a directory
  • 1.3 Build Boost libraries
    • 1.3.1 Open "Developer Command Prompt for VS 2022"
    • 1.3.2 Change directory to the root of Boost
    • 1.3.3 Run bootstrap
    • 1.3.4 Run b2 link=shared
  • 1.4 Add a new environment variable Boost_ROOT and set it to the root directory of boost
• Step 2: Setup Gmsh
  • 2.1 Download Gmsh SDK from https://gmsh.info/
  • 2.2 Unzip the package to a directory
  • 2.3 Modify the header file
    • 2.3.1 Go to include
    • 2.3.2 Rename gmsh.h to gmsh.h_cpp
    • 2.3.3 Rename gmsh.h_cwrap to gmsh.h
  • 2.4 Add a new environment variable Gmsh_ROOT and set it to the root directory of gmsh
• Step 3: Build PreVABS
  • 3.1 Open "Developer Command Prompt for VS 2022"
  • 3.2 Change the directory to the root of PreVABS
  • 3.3 Run tools\build_msvc.bat full

Once done, the executable prevabs.exe can be found in build_msvc\Release\.

Contact

Su Tian ([email protected])

Haodong Du ([email protected])

Wenbin Yu ([email protected])