Ferrite-FEM/Ferrite.jl

Viscoelasticity examples with OrdinaryDiffEq.jl integration

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#1,054 opened on Sep 17, 2024

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Description

We should showcase how to do structural mechanics with Ferrite+OrdinaryDiffEq.

  1. Rate-independent viscoelasticity (mass matrix form DAE with Hessenberg Index 1) with Rosenbrock solver -> Needs static condensation for the linear solver
  2. Rate-independent viscoelasticity (mass matrix form DAE with Hessenberg Index 1) with Runge-Kutta methods -> Needs multilevel Newton (xref https://github.com/SciML/OrdinaryDiffEq.jl/issues/1570 )
  3. Rate-dependent viscoelasticity with nonlinear rate dependency -> Maybe via IDA or DABDF2? Needs multilevel Newton

Contributor guide

Research direction
Familiarize with Ferrite and OrdinaryDiffEq integration, study viscoelasticity models, implement the three examples starting with the rate independent DAE using Rosenbrock solvers, then extend to Runge Kutta and rate dependent cases.
Tech stack
julia
Domain
None
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JuliaFerriteOrdinaryDiffEq
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25