On the identification of power-law creep parameters from conical indentation.

ABSTRACT: Load and hold conical indentation responses calculated for materials having creep stress exponents of 1.15, 3.59 and 6.60 are regarded as input 'experimental' responses. A Bayesian-type statistical approach (Zhang et al. 2019 J. Appl. Mech. 86, 011002 (doi:10.1115/1.4041352)) is used to infer power-law creep parameters, the creep exponent and the associated pre-exponential factor, from noise-free as well as noise-contaminated indentation data. A database for the Bayesian-type analysis is created using finite-element calculations for a coarse set of parameter values with interpolation used to create the refined database used for parameter identification. Uniaxial creep and stress relaxation responses using the identified creep parameters provide a very good approximatio

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC8371371 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature