Modeling of Crack Growth With Dwell Time for Aero-engine Spectra Loadings in a Ni-Based Superalloy
2016 (English)In: Journal of engineering for gas turbines and power, ISSN 0742-4795, E-ISSN 1528-8919, Vol. 138, no 1, 012501-012501 p.Article in journal (Refereed) Published
Testing and simulation of aero-engine spectra with dwell times are reported in this paper. The modeling concept used is built on linear elastic fracture mechanics (LEFM) and provides a history-dependent evolution description of dwell damage and its interaction with cyclic load. The simulations have been carried out for three spectra: (1) cyclic loads, (2) combined sustained load and cyclic loads, and (3) slow load ramps and cyclic loads, all for surface cracks at 550 °C for Inconel 718. All simulations show reasonable good agreement with experimental results. Prediction of multiple tests of several batches is also provided to show statistical scatter.
Place, publisher, year, edition, pages
ASME Press, 2016. Vol. 138, no 1, 012501-012501 p.
Applied Mechanics Mechanical Engineering Materials Engineering
IdentifiersURN: urn:nbn:se:liu:diva-121005DOI: 10.1115/1.4031155ISI: 000371127900012OAI: oai:DiVA.org:liu-121005DiVA: diva2:850753
Funding agencies: Swedish Energy Agency; Siemens Industrial Turbomachinery AB; GKN Aerospace Engine Systems; Royal Institute of Technology through Swedish Research Programme TURBO POWER2015-09-022015-09-022016-03-21Bibliographically approved