16 research outputs found
Degradation study of polypropylene (PP) and bioriented polypropylene (BOPP) in the environment
Prolonged survival of AVN wistar rats with transplanted yoshida sarcoma and increase of granular lymphocytes after administration ofBacillus firmus and their crude lipids
La correspondencia de Valencia : diario de noticias : eco imparcial de la opinión y de la prensa: Año XLIII Número 18074 - 1920 Abril 14
Copia digital. Madrid : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 200
Evaluating size effects on fatigue life of 42CrMo4+QT steel using a statistical S-N model with highly-stressed volume and surface
A statistical S-N model based on the highly-stressed volume/surface concept is proposed for evaluating the size effects on fatigue strength of specimens from 42CrMo4+QT steel. The proposed model extends an existing physically valid model (Castillo et al. 2009) and allows the S-N curve to be extrapolated from small-scale to full-scale components. The model is validated against experimental fatigue data obtained by testing solid and hollow smooth cylindrical specimens under push-pull constant amplitude loadings. After checking that the proposed model agrees with experimental fatigue data, it is possible to apply the model to estimate the S-N curve of specimens of the highly-stressed volume up to 1802 mm3. For this case, an S-N expression is provided that can directly be used in fatigue analysis without the necessity of running a non-linear optimization