A New Model to Determine the Dispersion of Fatigue Damage Evaluations



Título del documento: A New Model to Determine the Dispersion of Fatigue Damage Evaluations
Revista: Journal of the Brazilian Society of Mechanical Sciences
Base de datos: PERIÓDICA
Número de sistema: 000312065
ISSN: 0100-7386
Autores: 1
2
Instituciones: 1Universidade de Brasilia, Departamento de Engenharia Mecanica, Brasilia, Distrito Federal. Brasil
2Pontificia Universidade Catolica do Rio de Janeiro, Departamento de Engenharia Mecanica, Rio de Janeiro. Brasil
Año:
Volumen: 23
Número: 4
Paginación: 533-543
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés Reliable predictions of remaining lives of civil or mechanical structures subjected to fatigue damage are very difficult to be made. In general, fatigue damage is extremely sensitive to the random variations of material mechanical properties, environment and loading. These variations may induce large dispersions when the structural fatigue life has to be predicted. Wirsching (1970) mentions dispersions of the order of 30 to 70 % of the mean calculated life. The presented paper introduces a model to estimate the fatigue damage dispersion based on known statistical distributions of the fatigue parameters (material properties and loading). The model is developed by expanding into Taylor series the set of equations that describe fatigue damage for crack initiation
Disciplinas: Ingeniería,
Matemáticas
Palabras clave: Ingeniería de materiales,
Matemáticas aplicadas,
Materiales,
Propiedades,
Fatiga,
Confiabilidad,
Vida útil,
Predicción,
Modelos matemáticos
Keyword: Engineering,
Mathematics,
Materials engineering,
Applied mathematics,
Materials,
Properties,
Fatigue,
Reliability,
Useful life,
Prediction,
Mathematical models
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