Evaluation of the impact of residual stresses in crack initiation with the application of the crack compliance method part II, experimental analysis

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Resumen

The present work is based on a previous numerical simulation used for the introduction of a residual stress field in a modified compact tensile specimen. The main objective in that paper was to evaluate the effect that previous history has in crack initiation and to establish the new loading conditions needed to propagate a fracture. The experimental analysis presented in this paper was performed to compare and validate the numerical procedure. Several modified compact tensile specimens from a biocompatible material (AISI 316L) were manufactured to estimate the beneficial effect of a residual stress field. The specimens were separated in four batches; an initial group of uncracked specimens was used to establish an evaluation of the induction of a residual stress field produced by an overload; the remaining specimens were separated into three groups where a crack was introduced in each specimen (1 mm, 5 mm and 10 mm respectively) and the residual stress field caused by the application of an overload was determined. The assessment of all the residual stress fields introduced into the specimens was done by the application of the crack compliance method (CCM). The results obtained have provided useful information on the correlation between the numerical and experimental procedures. Furthermore, data concerning the understanding of diverse factors related to crack initiation are discussed in this paper. Finally, the beneficial aspects of the residual stresses are discussed.

Idioma originalInglés
Título de la publicación alojadaAdvances in Experimental Mechanics VII
Páginas261-266
Número de páginas6
DOI
EstadoPublicada - 2010
Evento7th International Conference on Advances in Experimental Mechanics - Liverpool, Reino Unido
Duración: 7 sep. 20109 sep. 2010

Serie de la publicación

NombreApplied Mechanics and Materials
Volumen24-25
ISSN (versión impresa)1660-9336
ISSN (versión digital)1662-7482

Conferencia

Conferencia7th International Conference on Advances in Experimental Mechanics
País/TerritorioReino Unido
CiudadLiverpool
Período7/09/109/09/10

Huella

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