[Enhancement] Add axisymmetric compatibility to log-conform-viscoelastic-3D

[VatsalSy]

Overview

Currently, the code lacks axisymmetric (axi) compatibility. While this has been marked as non-critical and non-urgent in the codebase, documenting the required changes and considerations could be valuable for future reference or if implementation becomes necessary.

Current Status

• Code explicitly prevents axi usage with an error message
• Alternative implementations are available in:
  • log-conform-viscoelastic-scalar-2D.h (scalar formulation)
  • log-conform-viscoelastic.h (more efficient implementation)

Required Changes

1. Tensor Compatibility

• Enforce tensor compatibility throughout the codebase
• Implement consistent usage of foreach_dimensions for tensor operations
• Review and update tensor calculations for axi compatibility

2. Metric Terms Implementation

• Review current usage of metric terms (cm and fm)
• Implement missing metric terms where needed
• Ensure proper scaling in cylindrical coordinates

3. Code Structure

• Update error handling to support axi mode
• Add conditional compilation for axi-specific code
• Update documentation to reflect axi compatibility

Technical Considerations

• Impact on performance when using metric terms
• Compatibility with existing 3D implementations
• Potential conflicts with current tensor calculations
• Testing requirements for axi mode

Notes

• This enhancement is marked as non-critical and non-urgent
• Current workaround: Use alternative implementations mentioned above
• Implementation should maintain code readability

Labels

• enhancement
• documentation
• help wanted
• good first issue

Related Files

• log-conform-viscoelastic-3D.h
• log-conform-viscoelastic-scalar-2D.h
• log-conform-viscoelastic.h