Results 271 to 280 of about 48,809 (312)
Some of the next articles are maybe not open access.
Laws of fatigue fracture of metallic materials
Metal Science and Heat Treatment, 2006A kinetic criterion of fatigue fracture of metallic materials is suggested and used for showing the existence of a single fatigue curve for cases of soft (with specified load amplitude) and rigid (with specified strain range in a cycle) loading for the stages of crack formation and propagation.
openaire +1 more source
Hooke's law and fatigue limits in micromechanics
European Journal of Physics, 2001Scanning tunnelling microscopes can be used to detect transitions between reversible and irreversible deformations of materials. Since the occurrence of stress-strain hysteresis is a necessary condition for the generation of material defects, and the cumulation of defects is, in turn, the underlying cause of fatigue failure, the observation of non ...
openaire +1 more source
Elastic correction of fatigue crack growth laws
Fatigue & Fracture of Engineering Materials & Structures, 2019AbstractFatigue crack growth (FCG) is usually studied assuming that ΔKis the driving parameter. An effective ΔKis considered in the presence of crack closure. However, after crack opening, there is an elastic regime that does not contribute to FCG. The objective here is to quantify this elastic range of ΔK, ΔKel, for different loading conditions and ...
Fernando Antunes +3 more
openaire +1 more source
Fatigue & Fracture of Engineering Materials & Structures, 2020
AbstractThe present contribution investigates the crack‐size effects on Paris' law in accordance with dimensional analysis and intermediate asymptotics theory, which makes it possible to obtain a generalised equation able to provide an interpretation to the various empirical power‐laws available in the Literature.
Carpinteri A., Montagnoli F.
openaire +2 more sources
AbstractThe present contribution investigates the crack‐size effects on Paris' law in accordance with dimensional analysis and intermediate asymptotics theory, which makes it possible to obtain a generalised equation able to provide an interpretation to the various empirical power‐laws available in the Literature.
Carpinteri A., Montagnoli F.
openaire +2 more sources
On the law of fatigue crack layer propagation in polymers
Polymer Engineering & Science, 1982AbstractA generalized theory of fatigue crack propagation in polymers is presented. The theory accounts for crack propagation through root craze extension accompanied by the dissemination of micro defects around the main crack thereby describing a crack layer (CL) system. In addition to the conventional crack length(l), the CL width(w) is introduced as
A. Chudnovsky, A. Moet
openaire +1 more source
New unified laws in fatigue: From the Wöhler’s to the Paris’ regime
Engineering Fracture Mechanics, 2007Generalizations and unification of the celebrated Paris' and Wohler's laws for fatigue crack propagation are derived by applying the recently developed quantized (or finite) fracture mechanics. In particular, three generalized Paris', Wohler's or unified laws are proposed and compared, demonstrating their applicability for predicting the life time of ...
PUGNO, Nicola +2 more
openaire +1 more source
A scaling law for fatigue crack initiation in steels
Scripta Metallurgica et Materialia, 1995The beneficial effect of a fine grain size on crack initiation and low-cycle fatigue (LCF) life is well known. Previous studies have shown that the cycle to failure in many alloys is increased with decreasing grain or microstructural unit size.
openaire +1 more source
Random Slip Model of Fatigue and Coffin's Law
Nature, 1960COFFIN1 has shown that for a number of metals and alloys the relation between n the number of cycles to fracture and E the plastic strain in each cycle is of the simple form :
openaire +1 more source
Unification proposals for fatigue crack propagation laws
Multidiscipline Modeling in Materials and Structures, 2017PurposeThe purpose of this paper is to propose the new dependences of cycles to failure for a given initial crack length upon the stress amplitude in the linear fracture approach. The anticipated unified propagation function describes the infinitesimal crack-length growths per increasing number of load cycles, supposing that the load ratio remains ...
openaire +1 more source
Burnout, chronic fatigue, and prozac in the professions: The iron law of salaries
Review of Radical Political Economics, 2001In this model of contested exchange, ambitious salaried yuppies (in accounting, consulting, engineering, higher education, investment banking, law, management, marketing, medicine, or other professions) inevitably toil on the verge of depression, much as wage workers once toiled on the verge of starvation.
openaire +1 more source