Results 11 to 20 of about 70,301 (265)

Planning of physical load of annual cycle of students’, practicing cyclic kinds of sports, training

open access: yesPhysical Education of Students, 2017
Purpose: to offer the variant of physical load’s distribution in annual cycle of students’, practicing cyclic kinds of sports training. Material: in the research pedagogic HEE students, specializing in skiing and light athletic participated (n=18 - boys,
R.S. Nagovitsyn   +2 more
doaj   +1 more source

A Variable-Order Dynamic Constitutive Model for Clay Based on the Fractional Calculus

open access: yesApplied Sciences, 2022
To accurately describe the deformation characteristics of clay under long-term cyclic load, based on fractional calculus theory, elastoplastic theory and the basic element model, a variable-order fractional dynamic model designed to predict accumulative ...
Bo-Lang Zhang   +3 more
doaj   +1 more source

A constitutive model for cyclic densification of coarse-grained soil filler for the high-speed railway subgrade considering particle breakage [PDF]

open access: yesRailway Sciences, 2022
Purpose – This study aims to propose a semiempirical and semitheoretical cyclic compaction constitutive model of coarse-grained soil filler for the high-speed railway (HSR) subgrade under cyclic load.
Yangsheng Ye   +5 more
doaj   +1 more source

Study on Crack Penetration Induced by Fatigue Damage of Low Permeability Coal Seam under Cyclic Loading

open access: yesEnergies, 2022
For low permeability coal seam permeability is weak, low degree of gas migration, prone to gas accidents and other issues. In this paper, a numerical model is established to simulate the process of hydraulic fracturing under monotonic loading and cyclic ...
Anjun Jiao, Shixiang Tian, Huaying Lin
doaj   +1 more source

Experimental investigation of preload losses in high strength bolts under cyclic loading

open access: yesGrađevinar, 2021
Slip-resistant shear connections with preloaded bolts have traditionally been used in steel structures exposed to cyclic. Hence, shear load is transferred through friction surfaces rather than through contact between the bolt surface and the hole.
Nenad Fric   +3 more
doaj   +1 more source

Influence of cyclic dynamic disturbance on damage evolution and zoning effect of coal-rock under local static load constraint

open access: yesGeohazard Mechanics, 2023
In order to obtain the characteristics of the effects of cyclic impact loading on the damage of coal-rock in the presence of a local static load constraint, the evolution of the damage factor and the fracture rate during the process and incremental ...
Yihong Liu   +5 more
doaj   +1 more source

Investigation of cyclic fatigue of rotary endodontic instruments

open access: yesЭндодонтия Today, 2022
Aim. To study the properties and resistance to cyclic loading of nickel-titanium files with a martensitic phase. The use of nickel-titanium instruments is an integral part of the endodontic treatment of root canals.
Z. S. Khabadze, F. R. Ismailov
doaj   +1 more source

Pullout behavior of polymeric strip in compacted dry granular soil under cyclic tensile load conditions

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2018
Assessment of the reinforcement behavior of soil under cyclic and monotonic loads is of great importance in the safe design of mechanically stabilized earth walls. In this article, the method of conducting a multistage pullout (MSP) test on the polymeric
Sajad Razzazan   +2 more
doaj   +1 more source

Experimental Investigation on Behavior of Single-Helix Anchor in Sand Subjected to Uplift Cyclic Loading

open access: yesJournal of Marine Science and Engineering, 2022
Helical anchors have been widely used in geotechnical engineering due to their large uplift resistance. However, the current knowledge of the cyclic performance of helical anchors is still insufficient.
Dongxue Hao   +5 more
doaj   +1 more source

Effect of Loading Rate on the Fracture Behavior of Nuclear Piping Materials Under Cyclic Loading Conditions

open access: yesNuclear Engineering and Technology, 2016
This study investigated the loading rate effect on the fracture resistance under cyclic loading conditions to understand clearly the fracture behavior of piping materials under seismic conditions.
Jin Weon Kim   +2 more
doaj   +1 more source

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