Results 1 to 10 of about 7,484,360 (335)

Dynamic queuing transmission model for dynamic network loading

open access: yesTransport, 2017
This paper presents a new macroscopic multi-class dynamic network loading model called Dynamic Queuing Transmission Model (DQTM). The model utilizes ‘good’ properties of the Dynamic Queuing Model (DQM) and the Link Transmission Model (LTM) by offering a ...
Nevena Raovic   +2 more
doaj   +5 more sources

Rigid elliptical cross-section ogive-nose projectiles penetration into concrete targets

open access: yesDefence Technology, 2021
The elliptical cross-section ogive-nose projectile (ECOP) has recently attracted attention because it is well suited to the flattened shape of earth-penetrating weapons.
Xiang-hui Dai   +5 more
doaj   +1 more source

Study of the axial density/impedance gradient composite long rod hypervelocity penetration into a four-layer Q345 target

open access: yesDefence Technology, 2023
Based on the dynamic shock response of the material and structure, the hypervelocity impact processes and mechanisms of long composite rods with axial density/impedance gradients penetration into four-layer targets were studied through experiments and ...
Na Feng   +7 more
doaj   +1 more source

The Role of Retained Austenite in Tempered Martensite Embrittlement of 4340 and 300-M Steels Investigated through Rapid Tempering

open access: yesMetals, 2021
Tempered martensite embrittlement (TME) is investigated in two medium carbon, high strength steels, 4340 (low silicon) and 300-M (high silicon), via rapid (1, 10, or 100 s) and conventional (3600 s) tempering. Rapid tempering of 4340 diminishes the depth
Virginia K. Euser   +4 more
doaj   +1 more source

Mechanical properties of basalt: a study on compressive loading at different strain rates using SHPB

open access: yesActa Polytechnica CTU Proceedings, 2023
This article focuses on the mechanical properties of basalt in compressive loading at different strain-rates. The study employs advanced instrumentation for the evaluation of the results in dynamic conditions, while standard uni-axial loading device is ...
Jan Falta   +4 more
doaj   +1 more source

Local Phase-Amplitude Joint Correction for Free Surface Velocity of Hopkinson Pressure Bar

open access: yesApplied Sciences, 2020
The Hopkinson pressure bar is widely used to measure the reflected pressure of blast waves over a short distance. However, dispersion effects will occur when the elastic stress waves propagate in the pressure bar due to lateral inertia, and there will be
Jun Yang   +7 more
doaj   +1 more source

Dynamics of operation of a load-railing crane in conditions of violation of the support circuit [PDF]

open access: yesНаучно-технический вестник Брянского государственного университета, 2020
The article presents a developed analytical mathematical model for balancing a railway crane on outriggers as a result of subsidence of the soil under one outrigger, which allows to determine the main parameters and patterns of operation of the hoisting ...
Potakhov D.A.
doaj   +1 more source

Fracture Resistance of Zirconia Oral Implants In Vitro: A Systematic Review and Meta-Analysis [PDF]

open access: yes, 2020
Various protocols are available to preclinically assess the fracture resistance of zirconia oral implants. The objective of the present review was to determine the impact of different treatments (dynamic loading, hydrothermal aging) and implant features (
Bethke, Annalena   +6 more
core   +1 more source

Effect of strain rate on the yielding mechanism of amorphous metal foam [PDF]

open access: yes, 2010
Stochastic amorphous Pd_(43)Ni_(10)Cu_(27)P_(20) foams were tested in quasistatic and dynamic loading. The strength/porosity relations show distinct slopes for the two loading conditions, suggesting a strain-rate-induced change in the foam yielding ...
Demetriou, Marios D.   +5 more
core   +1 more source

Research into the Loading of the Tank Car Frame Concept with Filler in the Composite Center Sill

open access: yesCommunications, 2022
The study deals with determination of the dynamic loading on the frame of a tank car with closed composite center sill filled with elastic-viscous filler.
Oleksij Fomin   +3 more
doaj   +1 more source

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