Open tasks¶

Thank you for your interest in contributing to this code base. The following task are open for your contributions.

Local functions¶

• Implementing a unit normal field function¹ and its derivatives w.r.t. its coefficients \( \boldsymbol{x}_i \)

  \[ \boldsymbol{n} = \frac{\boldsymbol{a}_1 \times \boldsymbol{a}_2}{||\boldsymbol{a}_1 \times \boldsymbol{a}_2||}, \quad \text{with } \boldsymbol{a}_{\alpha} = \sum_{i=1}^n N^i_{,\alpha}(\boldsymbol{\xi}) \boldsymbol{x}_i \]

  To implement this, see link.

• Support second derivatives

• Add \( \operatorname{div} \) and \( \operatorname{curl} \) wrapper

Control routines¶

• Dynamics (Explicit/ implicit time stepping)

Control routines - addons¶

• Extended systems
• Nonlinear dependence of \(F_{ext}\) on \(\mathbf{D}\) and \(\lambda\) for path-following techniques, see control routines.

Finite element helper¶

• Implement a default mass matrix

Finite elements¶

• Nonlinear Reissner-Mindlin shell ²
• Kirchhoff-Love shell
• 3D-Beam
• Implement forces and stiffness matrix of NonLinearElasticityFE
• Standard beam and plate formulations

Further addons¶

• Python binding (pybind11)
• Muesli