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Mechanical properties of polypropylene composites based on natural fibers subjected to multiple extrusion cycles
(John Wiley & Sons Inc, 2007-01)
The influence of multiple extrusion cycles on the behavior of natural fibers-reinforced polypropylene was studied. Composites were fabricated with 20 wt % of flax fibers. Final fibers dimensions (length and diameter) were ...
Estimation of high cycle fatigue behaviour using a threshold curve concept
(Elsevier, 2018-03-16)
Estimation of short crack propagation rates has proven to be a key factor in design and maintenance of metallic components subjected to loading conditions related to high cycle fatigue (HCF). Extrapolation of long crack ...
Estimation of the plain high-cycle fatigue propagation resistance in steels
(Universidade Federal de São Carlos, 2002-12)
In this work a method to estimate the high cyclic fatigue propagation life of steel specimens under constant loading is presented. This method is based in experimental evidence that the fatigue limit represents the threshold ...
Effect of Hygrothermal History on Water and Mechanical Properties of Glass/Vinylester Composites
(Sage Publications Ltd, 2006-01-01)
The effects of hygrothermal aging on the mechanical and viscoelastic properties of vinylester (VE)/unidirectional glass-fiber composites are reported. The studies are done by means of a dynamometer (INSTRON) and a dynamic ...
Methodological approaches to structural-logical analysis of interaction for business cycles
(Universidad del Zulia, 2019)
Dormancy cycling in Polygonum aviculare seeds is accompanied by changes in ABA sensitivity
(Oxford University Press, 2020-07)
Polygonum aviculare seeds shows high levels of primary dormancy (PD). Low winter temperatures alleviate dormancy and high spring temperatures induce seeds into secondary dormancy (SD), naturally establishing stable seedbanks ...
The Antikythera Mechanism: The Construction of the Metonic Pointer and the Back Plate Spirals
(Sage Publications, 2014-06)
The Antikythera Mechanism, the ancient mechanical computer of unique technological sophistication dated to the 2nd century B.C., was housed in a wooden case and had dials at its front and back side as well as lots of ...
Work inspections as a control mechanism for mitigating work accidents in Europe
(Instituto Tecnológico de Costa Rica, 2020)
Understanding the influence of orography on the precipitation diurnal cycle and the associated atmospheric processes in the central Andes
(Springer, 2018-06)
In the tropical Andes, the identification of the present synoptic mechanisms associated with the diurnal cycle of precipitation and its interaction with orography is a key step to understand how the atmospheric circulation ...
Metastable effects on martensitic transformation in SMAs: Part X. An approach to thermodynamic changes induced for the S-shaped cycles in thick wires of NiTi
(Springer, 2017-04-01)
The transformation and retransformation paths realized at constant stress in wires of NiTi SMAs show a horizontal or “flat” behavior in the hysteretic cycle. After sinusoidal cycling at 0.01 Hz (i.e., training) with a ...