Analysis of creep-dominated tensile stress-strain data
Year: 2025
Type: article
Abstract: An analysis is presented of tensile (nominal) stress-strain data, covering a range of strain rates, for cases in which the behaviour is dominated by creep. Example calculations are carried out using reported outcomes from several publications: no new experimental data are presented. An important part of the analysis is conversion of the raw (nominal) data to true values (for stress, strain and strain rate). Two novel procedures are described for extraction of creep characteristics from experimental data of this type. The first is based on a simple logarithmic plot, with a combination of a (true) stress and a corresponding (true) creep strain rate being obtained from each test (with a given nominal strain rate). The other involves the use of a simple numerical model (implemented using a spreadsheet), with creep parameter values being obtained via optimisation of the fit between experimental and modelled stress-strain curves. These approaches offer attractions for obtaining creep parameters via experimental procedures that are simpler, more robust and easier to carry out than those of conventional creep testing. They are, however, applicable only to cases for which the rates of creep are relatively high.
Author: TW Clyne
Institution: University of Cambridge
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,740
OpenAlex ID: W4409602539