A Study on the Large Ductile Deformations and Perforation of Mild Steel Plates Struck by a Mass—Part II: Discussion

1997 ◽  
Vol 119 (2) ◽  
pp. 185-191 ◽  
Author(s):  
N. Jones ◽  
S.-B. Kim
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Mild Steel ◽  
Steel Plates ◽  
Empirical Formulas ◽  
Mass Part ◽  
The Impact

An experimental study into the ductile deformations and static and impact perforation of mild steel plates is reported in Part I. These results are discussed in this article and compared with other experimental data reported in the literature. The accuracy of various empirical formulas for the impact perforation of plates is also examined.

An Experimental Study on the Lateral Impact of Fully Clamped Mild Steel Pipes

1992 ◽  
Vol 206 (2) ◽  
pp. 111-127 ◽  
Author(s):  
N Jones ◽  
S E Birch ◽  
R S Birch ◽  
L Zhu ◽  
M Brown
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Mild Steel ◽  
Failure Modes ◽  
Experimental Results ◽  
Lateral Impact ◽  
Drop Hammer ◽  
Steel Pipes ◽  
Scale Range ◽  
The Impact

This report presents some experimental data that were recorded from 130 impact tests on mild steel pipes in two drop hammer rigs. The pipes were fully clamped across a span which was ten times the corresponding outside pipe diameters which lie between 22 and 324 mm. All of the pipes except five had wall thicknesses of 2 mm approximately and were impacted laterally by a rigid wedge indenter at the mid span, one-quarter span or near to a support. The impact velocities ranged up to 14 m/s and caused various failure modes. Some comparisons between two sets of experimental results indicate that the laws of geometrically similar scaling are almost satisfied over a scale range of approximately five.

A Study on the Large Ductile Deformations and Perforation of Mild Steel Plates Struck by a Mass—Part I: Experimental Results

1997 ◽  
Vol 119 (2) ◽  
pp. 178-184 ◽  
Author(s):  
N. Jones ◽  
S.-B. Kim
Keyword(s):  
Mild Steel ◽  
Empirical Equation ◽  
Longitudinal Axis ◽  
Experimental Results ◽  
Steel Plates ◽  
Ductile Deformation ◽  
Circular Boundary ◽  
Mass Part ◽  
The Impact ◽  
Made In

An experimental study is reported on the ductile deformation and perforation of plates struck at the center by solid cylindrical projectiles having the longitudinal axis normal to the plate surface. The plates, which are made from 4 to 8-mm-thick mild steel sheet, are fully clamped around a circular boundary and are struck by projectiles having blunt ends and traveling with impact velocities within the range 7.7–118.9 m/s. Comparisons are made in Part II with the static perforation behavior and with previously published experimental results and several empirical equations for the impact case. A new empirical equation, which retains the influence of the impact velocity on the perforation energy, is also proposed in Part II.

scholarly journals EXPERIMENTAL STUDY ON THE IMPACT OF KEY PARAMETERS OF MELT MAGNETIC-PULSE TREATMENT ON THE ELECTROMAGNETIC PRESSURE

2017 ◽  
pp. 115-122
Author(s):  
V. N. Tsurkin ◽  
S. S. Cherepovskiy
Keyword(s):  
Experimental Data ◽  
Experimental Study ◽  
Pulse Pressure ◽  
Discharge Current ◽  
Processing Parameters ◽  
Discharge Circuit ◽  
Magnetic Pulse ◽  
Pulse Treatment ◽  
The Impact ◽  
Electromagnetic Pressure

Experimental data of measuring the pulse pressure in axial magnetic-pulse treatment of aluminum-based melt are obtained. Dependences between the electromagnetic pressure on the melt, amplitude and processing parameters such as the amplitude of current in the discharge circuit, the frequency of the discharge current and the distance between the inductor and the melt surface are shown. 

Influence of impactor nature, mass, size and shape on ballistic resistance of mild steel and Armox 500 T steel

2018 ◽  
Vol 10 (2) ◽  
pp. 174-197 ◽  
Author(s):  
Senthil Kasilingam ◽  
Mohd Ashraf Iqbal ◽  
Rupali Senthil
Keyword(s):  
Mild Steel ◽  
Steel Plate ◽  
Impact Resistance ◽  
Hardened Steel ◽  
Steel Plates ◽  
Material Parameters ◽  
Ballistic Resistance ◽  
Steel Target ◽  
Mass Size ◽  
The Impact

This study is based on the finite element investigation of the response of mild steel and Armox 500 T steel targets subjected to macro- and micro-size impactor. The simulations were carried out on target against penetrator with varying masses, sizes, shapes and different nature (rigid and deformable projectiles) using ABAQUS/Explicit. The material parameters of Johnson–Cook elasto-viscoplastic model were employed for predicting the behaviour of the target. The impact resistance of mild steel and Armox 500 T steel plates has been studied against flat nose having masses of 4, 8, 13.5, 27, 32 and 64 kg. The influence of temperature has also been studied numerically for particular penetrator. To study the influence of nature of projectile, the simulations were performed on mild steel and Armox 500 T steel targets against deformable 2024 aluminium flat, hardened steel flat and hardened steel conical impactors at 950 and 150 m/s incidence velocities. Also, the simulations were carried out on given target against 7.62 and 12.7 mm armour piercing incendiary ogival nose projectiles. The performance of (4.7 + 4.7 mm) 9.4-mm-thick equivalent mild steel and Armox 500 T steel plate in combination has also been studied against 7.62 armour piercing incendiary ogival nose projectiles at 950 and 150 m/s incidence velocities. The study thus presents a detailed investigation in terms of penetration, perforation and failure mechanism of mild steel and Armox 500 T steel target and leads to some important conclusions pertaining to the force and resistance offered by the target.

Simulation and Experimental Study on the Impact of Breadth of Back Blade on Axial Force Balance

2011 ◽  
Vol 130-134 ◽  
pp. 1568-1572
Author(s):  
Hui Wang ◽  
Jie Gang Mu ◽  
Miao Yin Su ◽  
Shui Hua Zheng ◽  
Jin Jing Zhao ◽  
...  
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Experimental Study ◽  
Axial Force ◽  
Three Dimensional ◽  
Force Balance ◽  
Simulation And Experiment ◽  
Simulation Results ◽  
The Impact ◽  
The Relationship

The paper studies the relationship between axial force and breadth of back blade by numerical simulation and experiment. On the basis of the RNG k-ε turbulence model and technology of compact local grids and regional computing, three dimensional numerical simulations to 100HZ165-250 centrifugal pump with various breadths were carried out. Through comparing and analyzing of the flow field, it can be seen that the axial force reduces with the increase of the back blade breadth. After that, the simulation results were verified by the experimental data got from different test devices, and it shows that the conclusions are reliable.

Influence of Internal Pressure on the Impact Behavior of Steel Pipelines

1996 ◽  
Vol 118 (4) ◽  
pp. 464-471 ◽  
Author(s):  
N. Jones ◽  
R. S. Birch
Keyword(s):  
Experimental Data ◽  
Mild Steel ◽  
Internal Pressure ◽  
Wall Thickness ◽  
Critical Values ◽  
Impact Behavior ◽  
Steel Pipes ◽  
Impact Tests ◽  
The Impact ◽  
Gas Pressures

This article presents some experimental data recorded from 54 impact tests on pressurized mild steel pipes. The pipes were fully clamped across a span which was ten times the outside pipe diameter of 60 mm. The pipes had a wall thickness of 1.70 mm and were impacted laterally by a rigid wedge indenter at the mid-span and one-quarter-span positions. The impact velocities ranged up to 13.6 m/s and caused large inelastic indentations for the lower values and at higher values a loss of integrity which could occur underneath the indenter and/or at an end support. The critical values for the two failure energies were obtained for a range of internal gas pressures.

On the Scaling of Low-Velocity Perforation of Mild Steel Plates

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Norman Jones ◽  
R. S. Birch
Keyword(s):  
Mild Steel ◽  
Scaling Laws ◽  
Experimental Results ◽  
Steel Plates ◽  
Ductile Deformation ◽  
Low Velocity ◽  
Rigid Plastic ◽  
Scale Range ◽  
Simple Equations ◽  
The Impact

Experimental results are reported for the perforation of geometrically similar fully clamped circular and square mild steel plates struck transversely by cylindrical projectiles having blunt, conical, and hemispherical noses. The striking masses are much heavier than the corresponding plate mass and travel with initial impact velocities up to about 12m∕s. The blunt projectiles perforate the plating easiest, while the hemispherical-nosed ones require the greatest energy. The perforation energy of a conical-nosed projectile is somewhat less than that for a hemispherical-nosed one. The data are used to explore the validity of the geometrically similar scaling laws over a geometric scale range of 4. The experimental results are compared to the empirical equations for the impact perforation of plates and with theoretical rigid-plastic predictions for the large ductile deformation behavior of those test specimens, which did not suffer cracking or perforation. The experimental results satisfy the requirements of geometrically similar scaling and some simple equations are presented, which are useful for design purposes.

scholarly journals Experimental Study on the Impact of Landslide-Generated Waves against Wharf Pile

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Ping Mu ◽  
Pingyi Wang ◽  
Linfeng Han ◽  
Jie Zhang ◽  
Meili Wang
Keyword(s):  
Experimental Study ◽  
Dynamic Pressure ◽  
Vertical Direction ◽  
Total Force ◽  
Empirical Formulas ◽  
Dimensionless Analysis ◽  
Wave Celerity ◽  
Impulse Waves ◽  
The Impact ◽  
The Waves

Landslide-generated waves have caused great catastrophic damage to the infrastructure, e.g., dam and wharf, because of the extreme loading in the reservoir area, while the wharf pile is rarely designed to withstand the loading associated with landslide-generated waves. This experimental study was conducted in a generalized 3D basin to simulate the waves generating process and explore the impact of the dynamic pressure process on the wharf pile. As the phenomenon that landslide-generated impulse waves impacted on the wharf pile in the form of dynamic pressure, the distribution pattern of the dynamic pressure along the water column was analyzed and revealed specifically. The results indicate that the dynamic pressure was constant below the water surface along the vertical direction and its magnitude was correlated with the wave amplitude as well as wave celerity. On this basis, a multivariate dimensionless analysis was implemented, and the empirical formulas for the dynamic pressure were established. Furthermore, the total force acting on the wharf pile was given. From a practical perspective, these findings could offer guidance to prevent the damage of the impulse wave pressure on the wharf pile.

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