A two-parameter framework to describe effects of constraint loss on cleavage fracture and implications for failure assessments of cracked components
Título del documento: A two-parameter framework to describe effects of constraint loss on cleavage fracture and implications for failure assessments of cracked components
Revista: Journal of the Brazilian Society of Mechanical Sciences and Engineering
Base de datos: PERIÓDICA
Número de sistema: 000312175
ISSN: 1678-5878
Autores: 1
Instituciones: 1Universidade de Sao Paulo, Sao Paulo. Brasil
Año:
Periodo: Oct-Dic
Volumen: 25
Número: 4
Paginación: 403-412
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Analítico
Resumen en inglés This study builds upon the J-Q approach to characterize constraint effects on cleavage fracture behavior of cracked structural components. Discussions emphasize features of current two-parameter fracture methodologies which extend the limits of applicability of single parameter fracture approaches when LSY effects prevail. Inclusion of the second parameter (Q) in failure assessment procedures leads to the construction of experimentally derived fracture toughness loci, rather than conventional, single-valued definitions of toughness. The plan of the article is as follows. First, the notion of crack tip constraint and its connection with SSY reference fields is introduced. This is followed by a brief description of the J-Q theory to define the hydrostatic parameter Q. The paper then addresses representative numerical solutions which provide J-Q trajectories for common fracture specimens under bend and tensile loading, including deep and shallow crack SE(B) and SE(T) specimens. These analyses, when taken together with previous works, provide a fairly extensive body of results against which the robustness of the J-Q methodology can be weighed
Disciplinas: Ingeniería
Palabras clave: Ingeniería de materiales,
Ingeniería mecánica,
Componentes estructurales,
Fracturas,
Exfoliación,
Parámetros,
Elementos finitos,
Integral-J
Keyword: Engineering,
Materials engineering,
Mechanical engineering,
Structural components,
Fractures,
Cleavage,
Parameters,
Finite elements,
J-integral
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