Best computational tool that could be used for calculation of thermal stresses

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Discussion Overview

The discussion revolves around identifying the most suitable computational tool for calculating temperature distribution and thermal stresses in structures, specifically within the context of finite element analysis (FEA). Participants explore various software options, their functionalities, and challenges faced in practical applications.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant seeks advice on the best computational tool for thermal stress calculations, mentioning ANSYS and ABAQUS.
  • Another participant questions the definition of "best computational tool," suggesting that most standard FEA packages can perform the required analysis.
  • A participant shares their experience with ANSYS Mechanical APDL, expressing difficulties in modeling a marine structure and issues with geometry import using IGES format.
  • Recommendations are made to use ANSYS Workbench and DesignModeler instead of APDL for better usability.
  • It is suggested that using Parasolid or Step formats for geometry import/export may yield better results than IGES.
  • A participant notes that while many FEA packages can perform thermal stress calculations, the capabilities vary significantly, especially for complex scenarios involving convection, coupled fluid-solid problems, phase changes, and mesh requirements.

Areas of Agreement / Disagreement

Participants generally agree that multiple FEA packages can handle thermal stress calculations, but there is no consensus on which specific tool is the best, as opinions vary based on user experience and specific application needs.

Contextual Notes

Limitations include the varying capabilities of different FEA packages for complex thermal analysis scenarios, as well as the challenges faced by users in geometry modeling and import/export processes.

chetanladha
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Hi everyone.
I am working to find out temperature distribution and thermal stresses in a structure. Can anyone please advice on which could be the best computational tool (ANSYS or ABAQUS or any other) for such kind of calculations.
Thanks in advance.
 
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Define "best computational tool." Pretty much any standard Finite Element Analysis package is capable of the analysis you're looking for.
 
Thank you for your response.
I have been trying to use ANSYS Mechanical APDL, but i am finding it difficult to make a marine structure. I even tried to use a drafting package and export it to ANSYS (IGES format), but it didn't work out very well..
Could you suggest any other package?
 
For a start, I would recommend using ANSYS Workbench and DesignModeler rather than APDL unless yuou're very familiar with the program's inner workings.

Second, I wouldn't use IGES as your geometry import/export format. I've found that using something like Parasolid or Step will yield much better results.
 
Mech_Engineer said:
Define "best computational tool." Pretty much any standard Finite Element Analysis package is capable of the analysis you're looking for.

Pretty miuch any standard FE package will do a thermal stress calculation given a temperature distribution (i.e. the temperature at each mesh point of the FE model).

However the thermal analysis capabilities of different FE packages vary quite a lot, if you want to anything "complicated" like
- Convection boundary conditions with user-defined laws for heat transfer coefficients (typically the HTC would be a function of a few non-dimensional fluid dynamics parameters),
- Coupled fluid-solid thermal problems where heat is carried in the moving fluid,
- Phase changes like freezing or melting,
- The need for different meshes for the thermal and structural models,
- etc.
 

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