SteffenSunde / friction_dynamics

Various friction simulations using C++ and Eigen3

Fretting dynamics

Simulating various friction systems. Note that this is very much a work in progress; use on own risk.

Current features: Simulates 1-dimensional friction chains, like Burridge-Knopoff systems. Calculates friction evolution and "noise" to pressure and see evolution of partial-slip. Various simplistic tools from chaos theory to study state space orbits etc.

TODO

• Write test cases (fuzzing?)
• 1DOF rate-dependent friction
  • Rate-dependent friction
  • Poincaré maps
  • Frequency analysis
• N-block system
• Refactor (see design philosophy further down)
• Write benchmarks
• YAML-parser
• Use fmt-library instead of native string concat
• Simulation types
  • Simple time integrator
  • Frequency sweep
  • Snapshots throughout a long sim
• HertzRateSine
  • Poincare sections
  • Slip history and FFT
  • Roughness (in pressure), e.g. using Ra/Rz
• Monte-Carlo simulation
• Change to Conan-based build?

Design Philosophies

• Const and constexpr/eval of as much as possible
• As little dynamic dispatching as possible
• Functionality before composability
• Use builder-pattern?
• For heap objects: single owner and unique_ptr

Licence

Free or whatever? GPL