scholarly journals NUMERICAL MODELLING AND SIMULATION OF VEHICULAR IMPACTS ON TIRE-MOUNTED CABLE BARRIERS

2019 ◽  
Author(s):  
HOWIE FANG ◽  
AMEY BADAR
Keyword(s):  
Numerical Modelling ◽  
Modelling And Simulation

Numerical modelling and simulation of non-uniformly doped channel 6H-silicon carbide MOSFET

2003 ◽  
Vol 19 (3) ◽  
pp. 373-379 ◽  
Author(s):  
Navneet Kaushik ◽  
Subhasis Haldar ◽  
Mridula Gupta ◽  
R S Gupta
Keyword(s):  
Silicon Carbide ◽  
Numerical Modelling ◽  
Modelling And Simulation

scholarly journals Numerical Modelling and Mechanical Characterization of Pure Aluminium 1050 Wire Drawing for Symmetric and Axisymmetric Plane Deformations

2020 ◽  
Vol 7 (4) ◽  
pp. 539-548
Author(s):  
Omolayo M. Ikumapayi ◽  
Benjamin I. Attah ◽  
Samuel O. Afolabi ◽  
Olurotimi M. Adeoti ◽  
Ojo P. Bodunde ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Numerical Modelling ◽  
Frictional Coefficient ◽  
Ductile Failure ◽  
Wire Drawing ◽  
Modelling And Simulation ◽  
Large Network ◽  
Pure Aluminium ◽  
Different Diameters ◽  
Plane Deformations

This present paper focused on the numerical modelling and simulation of the influence of friction and drawing tension while validating it with experimental results for both symmetric and axisymmetric plane deformations in stranded and unstranded wire drawing of pure aluminium. It must be noted that several methods have been deployed in recent years such as empirical, numerical, mathematical, analytical, as well as experimental in analyzing and optimizing forces and stresses in wire drawing and there are no definite solutions yet in solving the numerical complexities involved as a result of enormous number of factors during the wire drawing operation. On this note, modelling and simulation with different cases had been established. In this study, 9.50 mm was drawn into different diameters having 4.4 mm as entry and 1.7 mm as exit with intermediate sizes. It was established in the study that half conical angle must be kept as moderate as possible, it must not be too high or too low. An increase in reduction ratio (deformation) leads to an increase in tensile strength and that the tensile strength of material during wire during increases with an increase in the frictional coefficient. The fractographical examination revealed that unstranded aluminium drawn wire is more ductile due to the presence of a large network of dimples which are bimodal and equiaxed dominated by a cup and cone structures and this can be attributed to the ductile failure mode. Whereas the stranded aluminium-drawn wire possessed low ductility as revealed in fractography due to the presence of “Rock Candy fracture”.

scholarly journals Modelling and Simulation of Crash Tests on Curved Barriers Taking into Account Vehicle Speed Limits

2019 ◽  
Vol 14 (3) ◽  
pp. 304-325
Author(s):  
Marian Klasztorny ◽  
Daniel Bronislaw Nycz ◽  
Kamil Pawel Zajac
Keyword(s):  
Numerical Modelling ◽  
Traffic Safety ◽  
Road Safety ◽  
Road Traffic ◽  
Modelling And Simulation ◽  
Small Radius ◽  
Vehicle Speed ◽  
Road Traffic Safety ◽  
Safety Barriers ◽  
Crash Tests

The reliable speed of a vehicle, assigned to a given road arc, is not usually taken into account in simulation of crash tests on road safety barriers located on horizontal concave arcs with small radii (20−200 m). In this work, the numerical modelling and simulations of TB11, TB32 crash tests for selected road safety barriers on a horizontal concave arc with a small radius of 150 m, at a reliable and increased speed of a vehicle, were conducted. The authors developed the methodology of numerical modelling and simulation and published in the period 2015−2018. In this study, crash tests include two N2 class steel road barriers with the B-type guide rail, i.e. SP-05/1 (with 1.00 m post spacing) and SP-05/2 (with 2.00 m post spacing). Suzuki Swift and Dodge Neon vehicle models were taken from the National Crash Analysis Center (USA) library and modified, respectively. It was proved that road traffic safety on horizontal concave arcs with small radii is assured if the reliable velocity is not exceeded by drivers. Compacting the post spacing or the uses of a composite-foam protective overlay added to guide rails are not recommended.

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