Some observations on the numerical solution of the Ottosen-Stenström-Ristinmaa high-cycle fatigue model
Avainsanat:continuum approach, high-cycle fatigue, differential algebraic equation, ordinary differential equation, evolution equation
Some years ago, Ottosen, Stenström and Ristinmaa introduced a high-cycle fatigue model based on the continuum approach. The model is formulated as a fully implicit differential equation and an ordinary differential equation. The corresponding numerical solutions are compared. We demonstrate pitfalls in the process so that appliers are able to avoid these problems. Especially,
we show that the results depend on the initial value of the evolution equation. We propose a method to choose such an initial value that the estimated Wöhler curve fits the measured data.
Copyright (c) 2022 Osmo Kaleva, Heikki Orelma
Tämä työ on lisensoitu Creative Commons Nimeä 4.0 Kansainvälinen Julkinen -lisenssillä.