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Cold expansion of rail-end-bolt holes
OAI: oai:purehost.bath.ac.uk:openaire_cris_publications/ed291242-0994-4f36-a723-35cd71de8a10 • DOI: https://doi.org/10.1016/j.ijfatigue.2021.106275
Abstract
This paper provides experimental validation of a FE model simulating the cold-expansion of rail-end-bolt holes.
Three rail holes were used for the experiments and, contrary to literature, hoop and radial strains were measured
along different radial paths during the entire process using both electrical strain gauges and 2D-Digital Image
Correlation. Residual and maximum strains predicted with the FE model agree well with measurements obtained
with both experimental techniques, providing good confidence in the use of the proposed model to predict the
effective stresses acting around the holes and to develop a LEFM-based model for crack growth simulation at
cold-expanded holes.
Three rail holes were used for the experiments and, contrary to literature, hoop and radial strains were measured
along different radial paths during the entire process using both electrical strain gauges and 2D-Digital Image
Correlation. Residual and maximum strains predicted with the FE model agree well with measurements obtained
with both experimental techniques, providing good confidence in the use of the proposed model to predict the
effective stresses acting around the holes and to develop a LEFM-based model for crack growth simulation at
cold-expanded holes.