Relevant bibliographies by topics / Johnson Holmquist

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers
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Academic literature on the topic 'Johnson Holmquist'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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Journal articles on the topic "Johnson Holmquist"

1

Xie, Beijing, Zheng Yan, Yujing Du, Zeming Zhao, and Xiaoqian Zhang. "Determination of Holmquist–Johnson–Cook Constitutive Parameters of Coal: Laboratory Study and Numerical Simulation." Processes 7, no. 6 (June 21, 2019): 386. http://dx.doi.org/10.3390/pr7060386.

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The main sensitivity parameters of the Holmquist–Johnson–Cook constitutive model for coal were obtained from a variety of tests such as uniaxial compression, uniaxial cyclic loading, splitting and triaxial compression tests, as well as the indirect derivation equation of a briquette. The mechanical properties of briquettes under dynamic impact were investigated using a split Hopkinson pressure bar experiment. Based on the experimental measurement of the Holmquist–Johnson–Cook constitutive model, the numerical simulation of briquette was performed using ANSYS/LS-DYNA software. A comparison between experimental and simulation results verified the correctness of simulation parameters. This research concluded that the failure of briquette at different impact velocities started from an axial crack in the middle of the coal body, and the sample was swollen to some extent. By the increase of impact velocity, the severity of damage in the coal body was increased, while the size of the coal block was decreased. Moreover, there was good compliance between experimental and simulated stress wave curves in terms of coal sample failure and fracture morphology at different speeds. Finally, the parameters of the validated Holmquist–Johnson–Cook constitutive model were applied to the numerical simulation model of the impact damage of heading face and the process of coal seam damage in the roadway was visually displayed. The obtained results showed that the Holmquist–Johnson–Cook constitutive model parameters suitable for the prominent coal body were of great significance for the improvement and exploration of the occurrence mechanism of coal and rock dynamic disasters.
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Ren, Gen-Mao, Hao Wu, Qin Fang, and Xiang-Zhen Kong. "Parameters of Holmquist–Johnson–Cook model for high-strength concrete-like materials under projectile impact." International Journal of Protective Structures 8, no. 3 (August 2, 2017): 352–67. http://dx.doi.org/10.1177/2041419617721552.

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Holmquist–Johnson–Cook constitutive model has been widely used in analyzing the dynamic responses of concrete-like materials under projectile impact and explosive loadings, the constitutive parameters of which were always referred from the original documents and only applied to the normal strength concrete with the compressive strength of 48 MPa. Aiming to confirm the Holmquist–Johnson–Cook model parameters for high-strength concrete-like materials (compressive strength ≥60 MPa), based on the available test data from the quasi-static uniaxial compression, triaxial compression, Split-Hopkinson pressure bar, as well as the Hugoniot experiments, the strength parameters, the strain rate parameter, and the equation of state parameters of Holmquist–Johnson–Cook model for high-strength concrete-like materials are determined. Using the finite element program LS-DYNA, total eight sets of projectile penetration and perforation tests on high-strength concrete (uniaxial compressive strengths of 67.5–157 MPa) and high-strength rock targets (uniaxial compressive strengths of 60 and 154 MPa) are numerically simulated, respectively. By comparisons with the test data of penetration depths and residual velocities of the projectiles, the verifications of the proposed parameters are validated, which provides the reference for the design of protective structures.
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ISLAM, M. J., S. SWADDIWUDHIPONG, and Z. S. LIU. "PENETRATION OF CONCRETE TARGETS USING A MODIFIED HOLMQUIST–JOHNSON–COOK MATERIAL MODEL." International Journal of Computational Methods 09, no. 04 (December 2012): 1250056. http://dx.doi.org/10.1142/s0219876212500569.

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For concrete target penetration and/or perforation simulation, the Holmquist–Johnson–Cook (HJC) material model is widely used as concrete material model. However, the strain rate expression of the model has failed to explain the sudden increase in concrete strength at high strain rates. The pressure-volume relationship of the HJC model is complex and requires a large number of material constants. In this study, a modified Holmquist–Johnson–Cook (HJC) model is proposed for concrete material under high velocity impact. The modification involves simplification and improvement of the strain rate expression and pressure-volume relationship. Material parameters identification procedure for the MHJC model is also elaborated. The numerical simulations using the proposed model show a good agreement with experimental observations, especially, on the residual velocities, penetration depths and failure patterns of the target plates. These validate the applicability of the MHJC model for high velocity projectile impact studies for concrete.
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Ruggiero, A., G. Iannitti, N. Bonora, and M. Ferraro. "Determination of Johnson-holmquist constitutive model parameters for fused silica." EPJ Web of Conferences 26 (2012): 04011. http://dx.doi.org/10.1051/epjconf/20122604011.

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Gurevich, Leonid Moiseevich, Victor Georgievich Shmorgun, Dmitriy Vladimirovich Pronichev, and Roman Evgenyevich Novikov. "The Simulation of Titanium-Aluminium Composite with Intermetallic Inclusions Behavior under Compression." Key Engineering Materials 743 (July 2017): 176–80. http://dx.doi.org/10.4028/www.scientific.net/kem.743.176.

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3D finite element simulation of behavior of composite VT6-AD1-D20 with the intermetallic layer at axial compression was carried out. The properties of the intermetallic interlayer were described using the model of Johnson-Holmquist. The effect of the aluminum layer thickness on failure deformation was defined.
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Kurnenkov, Anton, Alexei Shurigin, and Vladimir Glebov. "Finite element analysis of the dynamic interaction between a single abrasive grain and a glass surface." MATEC Web of Conferences 298 (2019): 00068. http://dx.doi.org/10.1051/matecconf/201929800068.

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The article presents the results of 2D and 3D formulation finite element analysis of glass surface scratching process using single abrasive grain. Johnson-Holmquist model JH-2 was chosen to describe the brittle behavior of the glass material. The cracked layer depth for a given depth penetration of grain and scratching speed were obtained.
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Yuan, Yi Chu, Bei Zhi Li, Zhen Xin Zhou, and Qiang Zhang. "Study on the Simulation Model and Characteristics of High-Speed Grinding for Ceramics." Applied Mechanics and Materials 138-139 (November 2011): 662–67. http://dx.doi.org/10.4028/www.scientific.net/amm.138-139.662.

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Engineering ceramic machining would bring out several kinds of surface damage owing to its hard and brittle nature. In this paper, a simulation model of single-grit grinding for silicon carbide (Sic) was established to explore the high-speed grinding mechanism. The material behavior was described with the Johnson-Holmquist Ⅱ (JH-2) model. According to the simulation experiment results, the optimal grinding parameters to achieve ductile grinding for Sic has been analyzed, which would provide theoretical basis and take surface damage under control.
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Chen, Yu Feng, and Guang Xiang Yi. "Dynamic Response Analysis of the Reinforced Concrete Column under the Effect of Explosive Impact Load." Advanced Materials Research 681 (April 2013): 99–104. http://dx.doi.org/10.4028/www.scientific.net/amr.681.99.

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This paper does the data simulation analysis by using the large-scale finite element nonlinear ANSYS/LS-DYNA software. It chooses the MAT111(MAT-JOHNSON-HOLMQUIST -CONCRETE）concrete materials and the MAT3 (MAT-PLASTIC-KINEMATIC) reinforcement material model in ANSYS/LS-DYNA finite element software, builds the separating RC column finite element model, dynamically simulates the hurting process of RC column under the effect of explosive impact load, and mainly does research into the damage degree of RC column under different effects of explosive load of different peak pressures.
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Huang, Hongxin, Wenbin Li, and Zhenyu Lu. "Determination of Parameters of Johnson-Holmquist-II (JH-2) Constitutive Model for Red Sandstone." Journal of Physics: Conference Series 2002, no. 1 (August 1, 2021): 012071. http://dx.doi.org/10.1088/1742-6596/2002/1/012071.

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Gertsik, S. M., and Yu V. Novozhilov. "NUMERICAL SIMULATION OF A MASSIVE IMPACTOR FALLING ONTO A REINFORCED CONCRETE BEAM." Problems of strenght and plasticity 82, no. 1 (2020): 5–15. http://dx.doi.org/10.32326/1814-9146-2020-82-1-5-15.

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The paper presents the results of numerically modeling the dynamics of a concrete beam reinforced by longitudinal rods and transversal frames of rods under the effect of a falling massive impactor. The dynamic behavior of the material of concrete is described using the Holmquist - Johnson - Cook model. The reinforcement of the beam is modeled by beam elements, using the bilinear model of elastoplastic material with isotropic hardening. Binding between the reinforcement and concrete is described by introducing additional kinematic equations that couple degrees of freedom of the related nods of the beam and volumetric finite elements. The mathematical model makes it possible to introduce additional failure criteria to predict propagation of tensile cracking. Pressure lower than the minimal one (failure only in the tension zone) and volumetric strain higher than the threshold value are taken as a criterion of tensile failure. Failure is modeled by removing elements from the computational pattern, when the above failure criteria are satisfied. The effect of accounting for failure on the response of the beam is analyzed. Numerical modeling is done using the finite-element method with explicit time integration in the LOGOS and LS-DYNA systems. Concrete is modeled using linear four-node finite elements with one integration point. The impactor is modeled as an absolutely solid body with a detailed description of the impacting end. The obtained results are compared with experimental data. It is demonstrated that the Holmquist - Johnson - Cook material model developed for analyzing high-velocity impacts can also be applied to problems of low-velocity impact.
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Dissertations / Theses on the topic "Johnson Holmquist"

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Salman, Huseyin Anil. "Investigation Of Rain Erosion On Germanium By Using Finite Element Method." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613583/index.pdf.

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Impact of rain drops at relatively high velocities, which is known as rain erosion, causes severe damages on various materials. Every material can withstand the rain erosion up to a specific impact velocity. However, this damage is critical for optical windows which are very important components for Electro-Optical (EO) systems such as thermal camera. Even a small scratch may affect the transmission capability of the optical window adversely and leads to some functional problems in the device due to insufficient transmitted data. Since it has a vital effect on the EO systems, the rain erosion is needed to be investigated on the special optical windows, particularly for determining the velocity that a damage initiates. In this study, the rain erosion is investigated on germanium which is a kind of optical window, by means of numerical simulations in LS-DYNA. Damage Threshold Velocity (DTV) is examined for two different water shapes (which are spherical water drop and water jet) within a velocity range between 100 and 250 m/s. Both single and multiple impact cases are considered for both water shapes up to ten consecutive collisions. By using the results, the &ldquo
DTV versus number of impact curves&rdquo
are obtained in order to understand the amount of damage with respect to both single and multiple impacts. Results are compared with both literature and the experimental data within the scope of DTV and shape of the damage. In the numerical simulations, ALE (Arbitrary Lagrangian Eulerian) method is used for modelling water. &ldquo
JOHNSON-HOLMQUIST-CERAMICS (JH-2)&rdquo
which is recommended for both ceramics and glass applications is used as the material model for Germanium. JH-2 is a complete material model which contains damage effects, failure criteria, and Equation of State (EOS) all together. Among the material models available in the library of LS-DYNA, &ldquo
MAT-NULL + EOS-GRUNEISEN&rdquo
is used for water.
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Book chapters on the topic "Johnson Holmquist"

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Ogierman, W., and G. Kokot. "Multiscale analysis of metal matrix composite with ceramic reinforcement using Johnson-Holmquist constitutive model." In Advances in Mechanics: Theoretical, Computational and Interdisciplinary Issues, 435–39. CRC Press, 2016. http://dx.doi.org/10.1201/b20057-93.

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Conference papers on the topic "Johnson Holmquist"

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Cazamias, J. U., S. R. Bilyk, Mark Elert, Michael D. Furnish, William W. Anderson, William G. Proud, and William T. Butler. "CALIBRATING THE JOHNSON-HOLMQUIST CERAMIC MODEL FOR SIC USING CTH." In SHOCK COMPRESSION OF CONDENSED MATTER 2009: Proceedings of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2009. http://dx.doi.org/10.1063/1.3295073.

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Chocron, Sidney, James D. Walker, Donald J. Grosch, Stephen R. Beissel, Daniel D. Durda, and Kevin R. Housen. "Hypervelocity Impact on Concrete and Sandstone: Momentum Enhancement from Tests and Hydrocode Simulations." In 2019 15th Hypervelocity Impact Symposium. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/hvis2019-059.

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Abstract Concrete, sandstone, and, in a previous round of experiments, pumice, were tested under hypervelocity impact at SwRI. Aluminum spheres with diameters of 1 and 1.75 in were shot at a velocity of approximately 2 km/s using a 50-mm conventional powder gun. The targets were mounted on a swing so that the momentum enhancement could be measured. The size effect, i.e. comparing momentum enhancement generated by the small and large projectiles, was of particular interest in this project. The targets were also scaled, although for sandstone we were limited by the natural geometry of the rocks. The results from the experiments show a clear size effect for the concrete while sandstone did not show any size effect, possibly because of experimental artifacts. The sandstone behavior was investigated with computations using the EPIC hydrocode. The porosity and compressive strength of the sandstone used in the impact tests were measured and reported. The rock is very similar to one reported and extensively tested by Lawrence Livermore Laboratory in 1974. Two material models (Holmquist-Johnson Concrete and Johnson-Holmquist-Beissel) were fit to the data from LLL. The momentum enhancement predicted by the code is reported for different parameter studies.
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Rajendran, A. M., and K. P. Walsh. "Modeling of in-situ ballistic measurements using the Rajendran-Grove and Johnson-Holmquist ceramic models." In The tenth American Physical Society topical conference on shock compression of condensed matter. AIP, 1998. http://dx.doi.org/10.1063/1.55510.

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Bieler, James A., and Brad G. Davis. "Initial Testing and Constitutive Modeling of Cellular Rubber Subjected to Large Strains and High Strain Rates." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23866.

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Abstract In order to allow for the numerical modeling of impacts for the design of live fire facilities commonly used by military and law enforcement personnel against next generation and environmentally friendly ammunition currently in development, constitutive models for novel target materials must be developed. Many existing facilities are constructed from AR500 steel, coupled with a layer of cellular rubber to reduce impact velocities and contain projectile fragments. High strain rate models, such as the commonly used Johnson-Cook constitutive model, are widely available to characterize AR500 steel, but calibrated models do not currently exist to characterize the cellular rubber. This project seeks to address this shortfall and provide a suitable material model for designers of these facilities in order to ensure the safety of users and the public. Appropriate constitutive models that account for the large strain, high strain rates, and temperature effects experienced during ballistic events and the porosity of the material were researched and a plan developed for future materials testing. Three suitable models were selected for further analysis — A Non-Linear Elastic Model described by Johnson in his work with polyurethane coupled with a Mie-Gruneisen equation of state to account for the porosity of the material, an Osborn-Hull model developed for use with crushable solids, and the Holmquist-Johnson-Cook Model commonly used for cementitious materials.
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Rule, William Keith. "A Numerical Study of the Impact Response of Laminated Glass Panels." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71065.

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This paper describes a study that was undertaken to simulate impacts on laminated float glass/polycarbonate/float glass panels using the Johnson-Holmquist (JH-2) model for brittle materials and the EPIC explicit finite element code. The simulation results are compared with observed impact results obtained by others. The JH-2 model was originally successfully calibrated to treat impact on thick monolithic glass slabs. In this study recent spall strength data for glass reported in the literature was used to revise the JH-2 model for application to thin laminated glass panels — a system of wide technical interest. The JH-2 coefficients developed were further validated by comparison with an additional independent data set obtained from the literature involving glass rod impact data. A good fit to both data sets considered was produced suggesting that the revised JH-2 coefficients proposed are reasonable.
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Davis, Brad G., and Jared A. Dequenne. "Constitutive Modeling and Initial Validation of Cellular Concrete Subjected to Large Strains and High Strain Rates." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23893.

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Abstract The development of lead-free small caliber weapon systems has inadvertently resulted in rounds with more material penetration capabilities. The increased penetration may mean that existing live-fire facilities will no longer be adequate for the training and certification of military and law enforcement personnel. Constraints on training in many live-fire shoot house facilities are already in place, with some allowing only single round impact during training. With no existing constitutive model for the cellular concrete commonly used in these facilities, it is not currently possible to analyze existing facilities or design new facilities against the most recent generation of ammunition currently being fielded. This project utilizes unconfined compression, uniaxial tension, triaxial confinement, and uniaxial strain from the US Army Corps of Engineers Engineer Research and Development Center and Sandia National Laboratory to characterize cellular concrete using a Holmquist-Johnson-Cook Concrete model for use in numerical simulations. This model is then initially validated using data from existing single projectile impact experiments against a similar material, showing results with reasonable accuracy. Additional experiments to fully validate the proposed model are discussed. This model provides the facility owner a potential tool to validate the safety of their facility against new projectiles and provides the designer of new facilities a tool for optimizing future configurations using these materials.
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Reports on the topic "Johnson Holmquist"

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Gazonas, George A. Implementation of the Johnson-Holmquist II (JH-2) Constitutive Model into DYNA3D. Fort Belvoir, VA: Defense Technical Information Center, March 2002. http://dx.doi.org/10.21236/ada402347.

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