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holmquist t j jonson g d response of silicon strength

Characterization and evaluation of boron carbide for plate

Nov 14, 2006· This article addresses the response of boron carbide (B 4 C) to high-velocity impact. The authors previously characterized this material in 1999, using the Johnson-Holmquist [AIP Conf. Proc. 309, 981 (1994)] (JH-2) model. Since then, there have been additional experimental data presented in the literature that better describe the hydrostatic pressure (including a phase change).

Failure mode transition in ceramics under dynamic

Experimental results for aluminum nitride (AlN), together with data available in the literature, indie that a Mohr-Coulo criterion and the Johnson–Holmquist model fit the experimental data for failure in a brittle manner, whereas the ceramic material exhibited pressure insensitive plastic flow at high pressures.

Johnson–Holmquist damage model - Wikipedia

In solid mechanics, the Johnson–Holmquist damage model is used to model the mechanical behavior of damaged brittle materials, such as ceramics, rocks, and concrete, over a range of strain rates.Such materials usually have high compressive strength but low tensile strength and tend to exhibit progressive damage under load due to the growth of microfractures.

The Response of Silicon Carbide and Boron Carbide

The Response of Silicon Carbide and Boron Carbide Subjected to Shock-Release-Reshock Plate-Impact Experiments Article · Septeer 2009 with 22 Reads DOI: 10.1051/dymat/2009016

Johnson–Holmquist damage model - IPFS

In solid mechanics, the Johnson–Holmquist damage model is used to model the mechanical behavior of damaged brittle materials, such as ceramics, rocks, and concrete, over a range of strain rates.Such materials usually have high compressive strength but low tensile strength and tend to exhibit progressive damage under load due to the growth of microfractures.

Characterization and evaluation of boron carbide for plate

Nov 14, 2006· This article addresses the response of boron carbide (B 4 C) to high-velocity impact. The authors previously characterized this material in 1999, using the Johnson-Holmquist [AIP Conf. Proc. 309, 981 (1994)] (JH-2) model. Since then, there have been additional experimental data presented in the literature that better describe the hydrostatic pressure (including a phase change).

A Comparative Study on Various Ductile Crack Formation

Johnson, G. R., and Holmquist, T. J., 1989, “Test Data and Computational Strength and Fracture Model Contants for 23 Materials Subjected to Large Strain, High Strain Rates, and High Temperature,” Technical Report LA-11463-MS, Los Alamos National Laboratory.

Response of silicon carbide to high velocity impact

Apr 17, 2002· This article presents an analysis of the response of silicon carbide to high velocity impact. This includes a wide range of loading conditions that produce large strains, high strain rates, and high pressures. Experimental data from the literature are used to determine constants for the Johnson–Holmquist constitutive model for brittle materials (JH-1).

Which One Has More Influence on Fracture Strength of

Oct 15, 2016· Shafiq M., Subhash G. (2017) Which One Has More Influence on Fracture Strength of Ceramics: Pressure or Strain Rate?. In: Casem D., Laerson L., Kierley J. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. First Online 15 October 2016

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if~s.t - 000 ,; - j reference copy i| technical library ii naval surface warfare center-i dahlgren, va 22448-5020 ii 10 not remoue from library determinatimonof constitutive model constants from cylinder impa cttests by t. j holmquistand g. r. johnson s -(h:oneywellinc./armament …

19981216 029 - Defense Technical Information Center

A ceramic material has a complied response to high strain rates, with damage and fracture being very important. One semi-empirical model to describe the behaviour of brittle materials such as ceramics under high dynamic loads is called the Johnson-Holmquist model (Ref. 1,2).

Unsteady penetration of a target by a liquid jet

Dec 10, 2013· It is widely acknowledged that ceramic armor experiences an unsteady penetration response: an impacting projectile may erode on the surface of a ceramic target without substantial penetration for a significant amount of time and then suddenly start to penetrate the target. Holmquist T-J, Johnson G-R. The failed strength of ceramics

IJAT Vol.7 p.614 (2013) | Fuji Technology Press: academic

Abstract. Hammering action plays a primary role in material removal in ultrasonic machining (USM). In the present study, Smoothed Particle Hydrodynamics (SPH) is used to simulate the hammering action of a single silicon carbide abrasive particle on a float glass workpiece, and the impliions for crack initiation and propagation on the workpiece are discussed in detail.

A Comparative Study on Various Ductile Crack Formation

Johnson, G. R., and Holmquist, T. J., 1989, “Test Data and Computational Strength and Fracture Model Contants for 23 Materials Subjected to Large Strain, High Strain Rates, and High Temperature,” Technical Report LA-11463-MS, Los Alamos National Laboratory.

CONVERSION OF FINITE ELEMENTS INTO MESHLESS …

The upper left of Fig. 5 shows the response for an impact velocity of Vs = 1427 m/s. Here the to lower strength and/or more damage. If an erosion algorithm (rather than a conversion algorithm) is Johnson, G.R., Stryk, R.A., Holmquist, T.J., and Beissel, S.R., Numerical Algorithms in a Lagrangian

[PDF] Computational modeling of tungsten carbide sphere

The current investigation tested the existing material models of tungsten carbide and HSLA-100 steel by comparing available published experimental data, such as the depth and diameter of the impact crater, against the corresponding simulated results. Lagrange and smoothed particle hydrodynamics (SPH) simulations were carried out using an axisymmetric model of the tungsten carbide (WC

Laboratory Test on Dynamic Material Properties of Annealed

In this study, laboratory tests were conducted to investigate the dynamic material properties of annealed float glass, which is widely used in building appliions. The influence of strain rate effect on glass strength and Young''s modulus is studied. Quasi-static tests were performed first to determine the glass static strength and Young''s modulus; then dynamic compressive tests were carried

Computational Modeling of Failure for Hypervelocity

Procedia Engineering 58 ( 2013 ) 194 – 203 1877-7058 2013 The Authors. Published by Elsevier Ltd. Selection and peer-review under responsibility of the Hypervelocity Impact Society doi: 10.1016/j.proeng.2013.05.023 The 12 th Hypervelocity Impact Symposium Computational Modeling of Failure for Hypervelocity Impacts into Glass Targets Charles E. Anderson, Jr. a* and Timothy J. Holmquist …

2 Concrete Model - WIT Press

parametric computational study was performed by Johnson et. al./ and a computational concrete material model was developed by Holmquist, Johnson and Cook/ This work focuses on the response of the concrete target, and the computed results are compared to the recent experimental results of Gran and Frew/ The computations are based on an explicit

A Computational Constitutive Model for Glass Subjected to

Jul 27, 2011· This article presents a computational constitutive model for glass subjected to large strains, high strain rates and high pressures. The model has similarities to a previously developed model for brittle materials by Johnson, Holmquist and Beissel (JHB model), but …

On the analysis of transverse stress gauge data from shock

Johnson G R and Holmquist T J 1992 A computational model for brittle materials subjected to large strains, Abbate A and Frankel J 1994 Equation of state of aluminum nitride and its shock response J. Appl. Phys. 76 4077-85. Crossref [4] Bernstein D, Godfrey C, Bourne N K and Rosenberg Z 1995 Shear strength measurements in copper,

Numerical Simulation of the Kinetic Energy Projectile

ANSYS-LS/DYNA 3D finite element software projectile penetrating concrete target three-dimensional numerical simulation , has been the target characteristics and destroy ballistic missile trajectory , velocity and acceleration and analyze penetration and the time between relationship , compared with the test results , the phenomenon is consistent with the simulation results.

Verifiion of the Charpy Impact Test Capability to

Feasibility analysis of replacing split Hopkinson bars test by Charpy impact test for determination of Johnson-Cook’s material model parameters. The results show that the Charpy impact test may, due to the strain rates achieved, successfully replace the mentioned experimental test. Moreover the results shows that some further studies should be conducted to improve efficiency of the proposed

Johnson–Holmquist damage model - IPFS

In solid mechanics, the Johnson–Holmquist damage model is used to model the mechanical behavior of damaged brittle materials, such as ceramics, rocks, and concrete, over a range of strain rates.Such materials usually have high compressive strength but low tensile strength and tend to exhibit progressive damage under load due to the growth of microfractures.

[PDF] Computational modeling of tungsten carbide sphere

The current investigation tested the existing material models of tungsten carbide and HSLA-100 steel by comparing available published experimental data, such as the depth and diameter of the impact crater, against the corresponding simulated results. Lagrange and smoothed particle hydrodynamics (SPH) simulations were carried out using an axisymmetric model of the tungsten carbide (WC

Schuh Group

Adiabatic shear instability is not necessary for adhesion in cold spray, M. Hassani-Gangaraj, D. Veysset, V.K. Champagne, K.A. Nelson, C.A. Schuh, Acta Materialia

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