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Keywords = Mase formulas

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14 pages, 6199 KB  
Article
Mechanical Properties of Low Carbon Alloy Steel with Consideration of Prior Fatigue and Plastic Damages
by Qing Liu, Zhanzhan Tang, Xuan Yang, Zhixiang He, Hanyang Xue and Hanqing Zhuge
Crystals 2022, 12(7), 967; https://doi.org/10.3390/cryst12070967 - 11 Jul 2022
Cited by 4 | Viewed by 3595
Abstract
Mechanical properties, including the fatigue behavior of metals, are usually determined from damage-free specimens, but it is not well known how these properties change with respect to prior damages; hence, the present work aims to understand the remaining mechanical properties of low carbon [...] Read more.
Mechanical properties, including the fatigue behavior of metals, are usually determined from damage-free specimens, but it is not well known how these properties change with respect to prior damages; hence, the present work aims to understand the remaining mechanical properties of low carbon alloy steel Q345q with pre-damages. Low-cycle fatigue tests on the damage free specimens, tensile tests on the low-cycle fatigue damaged specimens, and fatigue tests on the plastic deformed specimens were carried out, respectively. The low-cycle fatigue life prediction formula was proposed. The influences of different kinds of pre-damages on the residual mechanical properties were analyzed. Results show that the stable hysteretic loops in the low-cycle fatigue tests are well-stacked. The material illustrates Masing behavior, and it has a good energy dissipation capacity. The ductility of the low-cycle fatigue-damaged materials decreases significantly in comparison with the undamaged ones. The low-cycle fatigue lives of Q345q steel are almost unaffected, so long as the pre-applied tensile strain is lower than 10%. Full article
(This article belongs to the Special Issue Crystal Plasticity (Volume II))
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21 pages, 3193 KB  
Article
Modeling Wave Overtopping on a Seawall with XBeach, IH2VOF, and Mase Formulas
by João Nuno C. Oliveira, Filipa S. B. F. Oliveira, Maria Graça Neves, María Clavero and António A. Trigo-Teixeira
Water 2020, 12(9), 2526; https://doi.org/10.3390/w12092526 - 10 Sep 2020
Cited by 13 | Viewed by 7892
Abstract
The advances in computational fluid dynamics have made numerical modeling a reliable complementary tool to the traditional physical modeling in the study of the wave overtopping phenomenon. This paper addresses overtopping on a seawall by combining the numerical models XBeach (non-hydrostatic and Surfbeat [...] Read more.
The advances in computational fluid dynamics have made numerical modeling a reliable complementary tool to the traditional physical modeling in the study of the wave overtopping phenomenon. This paper addresses overtopping on a seawall by combining the numerical models XBeach (non-hydrostatic and Surfbeat modes) and IH2VOF, and the Mase formulas. This work is structured in two phases: (i) phase I assesses the performance of numerical models and formulas in modeling wave run-up and overtopping on a seawall for a solid profile bottom and representative hydro-morphologic conditions of a study site in the Portuguese west coast; (ii) phase II investigates the effect of the profile bottom variation in the overtopping phenomenon for extreme maritime storm field conditions of the study site, considering a solid bottom and a varying sandy bottom. The results indicate that XBeach underestimates the wave energy, and the frequency and intensity of the overtopping occurrences predicted by IH2VOF; the numerical models’ run-up and overtopping discharge predictions are overestimated by the Mase formulas, in simplified and in storm field conditions; and the variation of the bottom morphology throughout the storm event greatly influences the XBeach predictions, while the Mase results are mostly influenced by the bottom roughness. Full article
(This article belongs to the Special Issue Dynamics and Biogeochemical Flows in Estuarine and Nearshore Systems)
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18 pages, 11558 KB  
Article
Monitoring and Modelling Coastal Vulnerability and Mitigation Proposal for an Archaeological Site (Kaulonia, Southern Italy)
by Diana Di Luccio, Guido Benassai, Gianluigi Di Paola, Carmen Maria Rosskopf, Luigi Mucerino, Raffaele Montella and Pasquale Contestabile
Sustainability 2018, 10(6), 2017; https://doi.org/10.3390/su10062017 - 14 Jun 2018
Cited by 37 | Viewed by 4969
Abstract
This paper presents a Coastal Vulnerability Assessment (CVA) of a microtidal beach located on the Ionian Sea in Calabria region (southern Italy) in order to examine the influence of the different run-up equations on CVA score and propose mitigation measures for the most [...] Read more.
This paper presents a Coastal Vulnerability Assessment (CVA) of a microtidal beach located on the Ionian Sea in Calabria region (southern Italy) in order to examine the influence of the different run-up equations on CVA score and propose mitigation measures for the most vulnerable parts of the beach. The coastal area has been severely eroded by extreme wave storms, which have also damaged important archaeological structures located on a nearby cliff. A typical 1 year return period (Tr) storm, associated with the recent criticalities, was chosen to test the different run-up formulas (Holman (1986), Mase (1989) Stockdon et al. (2006) and Poate et al. (2016)) on a number of beach profiles in order to check the sensitivity of the CVA calculation with regard to the different run-up equations. The obtained results provide evidence that different run-up levels often give rise to different CVA scores. Based on vulnerability results, some mitigation measures have been proposed for the beach in front of the archaeological area, based on submerged detached breakwater and an adherent gabion wall for the cliff defence. Full article
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