{"id":{"repo_id":"carleton","oai_identifier":"oai:carleton.scholaris.ca:20.500.14718/39732"},"canonical_url":"https://search.dev.ndltd.org/etd/carleton/oai:carleton.scholaris.ca:20.500.14718/39732","repository":{"repo_id":"carleton","name":"Carleton University","base_url":"https://carleton.scholaris.ca/server/oai/request"},"display":{"title":"Validation of a Computational Model for Predicting Fatigue Life","abstract":"A new computer model to predict fatigue life based on the evolution of damage in a structure is presented. The experimental data used to validate the model is provided by the SAE FDE Committee. The implemented damage model assumes that damage evolution can be computed as a function of the dissipation of hysteresis loop for a sequence of Ramberg-Osgood equations for a sequence of fatigue load cycles. This model does not use the Paris-Erdogan equation for crack growth. Two model parameters are the coefficients of the Ramberg-Osgood equation. The third model parameter is the total dissipation for the damage variable to reach a value of 1.0. Computer simulations of fatigue tests with block loading are demonstrated. A high-resolution plane strain FEM analysis that resolves the strain field near a stress concentration is shown to be necessary to achieve accurate predictions of fatigue crack nucleation and fatigue crack growth.","abstract_html":"A new computer model to predict fatigue life based on the evolution of damage in a structure is presented. The experimental data used to validate the model is provided by the SAE FDE Committee. The implemented damage model assumes that damage evolution can be computed as a function of the dissipation of hysteresis loop for a sequence of Ramberg-Osgood equations for a sequence of fatigue load cycles. This model does not use the Paris-Erdogan equation for crack growth. Two model parameters are the coefficients of the Ramberg-Osgood equation. The third model parameter is the total dissipation for the damage variable to reach a value of 1.0. Computer simulations of fatigue tests with block loading are demonstrated. A high-resolution plane strain FEM analysis that resolves the strain field near a stress concentration is shown to be necessary to achieve accurate predictions of fatigue crack nucleation and fatigue crack growth.","abstract_has_math":false,"creators":["Gaonkar, Nilesh Vishwanath"],"institution":"Carleton University","degree_name":"Master of Applied Science (M.App.Sc.)","degree_level":"Master's","degree_discipline":"Engineering, Mechanical","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019","date_published":"2019","updated_at":"2026-07-24T01:34:36Z","subjects":[],"languages":["en"],"rights":["Copyright © 2019 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. 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The experimental data used to validate the model is provided by the SAE FDE Committee. The implemented damage model assumes that damage evolution can be computed as a function of the dissipation of hysteresis loop for a sequence of Ramberg-Osgood equations for a sequence of fatigue load cycles. This model does not use the Paris-Erdogan equation for crack growth. Two model parameters are the coefficients of the Ramberg-Osgood equation. The third model parameter is the total dissipation for the damage variable to reach a value of 1.0. Computer simulations of fatigue tests with block loading are demonstrated. A high-resolution plane strain FEM analysis that resolves the strain field near a stress concentration is shown to be necessary to achieve accurate predictions of fatigue crack nucleation and fatigue crack growth."]},{"key":"dc:title","label":"Title","values":["Validation of a Computational Model for Predicting Fatigue Life"]}]}],"canonical_facts":{"dc:creator":["Gaonkar, Nilesh Vishwanath"],"dc:date.accessioned":["2025-04-08T19:47:11Z"],"dc:date.available":["2025-04-08T19:47:11Z"],"dc:date.issued":["2019"],"dc:description.abstract":["A new computer model to predict fatigue life based on the evolution of damage in a structure is presented. The experimental data used to validate the model is provided by the SAE FDE Committee. The implemented damage model assumes that damage evolution can be computed as a function of the dissipation of hysteresis loop for a sequence of Ramberg-Osgood equations for a sequence of fatigue load cycles. 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