The effect of target strength on the perforation of steel plates using three different projectile nose shapes

Dey, Sumita; Børvik, Tore; Hopperstad, Odd Sture; Leinum, J.R.; Langseth, Magnus

doi:10.1016/j.ijimpeng.2004.06.004

Cited by 219 publications

(191 citation statements)

References 15 publications

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“…For ductile metals, within that range of stress states, the failure strain becomes rather independent of triaxiality as reported in [48], Fig. 23.…”

Section: Comparison Between Experiments and Numerical Simulationsupporting

confidence: 63%

Estimation of fracture toughness, driving force, and fracture energy for fractal cracks using the method of imaginary smooth crack

Zhang

De-min

2010

Engineering Fracture Mechanics

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a b s t r a c tIn this paper is reported a study on the behaviour of ES mild steel sheets subjected to perforation by hemispherical projectiles. Experiments have been conducted using a pneumatic cannon within the range of impact velocities 5m=s V 0 60m=s. The experimental setup allowed evaluating initial velocity, failure mode and post mortem deflection of the plates. The tests have been recorded using high speed infrared camera. It made possible to obtain temperature contours of the specimen during impact. Thus, special attention is focussed on the thermal softening of the material which is responsible for instabilities and failure. Assuming adiabatic conditions of deformation, the increase of temperature may be related to the plastic deformation. The critical strain leading to target failure is evaluated coupling temperature measurements with numerical simulations and with analytical predictions obtained by means of the Rusinek Klepaczko constitutive relation [Rusinek, A., Klepaczko, J.R. Shear testing of sheet steel at wide range of strain rates and a constitutive relation with strain rate and temperature dependence of the flow stress. Int J Plasticity. 2001; 17, 87 115]. It has been estimated that the process of localization of plastic deformation which leads to target failure involves local values close to 3 p f z1 for the boundary value problem approached. Subsequently, this failure strain level has been applied to simulate the perforation process and the numerical results obtained show satisfactory agreement with the experiments in terms of ballistic limit, temperature increase and failure mode of the target.

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“…For ductile metals, within that range of stress states, the failure strain becomes rather independent of triaxiality as reported in [48], Fig. 23.…”

Section: Comparison Between Experiments and Numerical Simulationsupporting

confidence: 63%

Estimation of fracture toughness, driving force, and fracture energy for fractal cracks using the method of imaginary smooth crack

Zhang

De-min

2010

Engineering Fracture Mechanics

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“…3. The solid lines in this figure are fits to the data of the Recht-Ipson model employed to predict the residual velocity V r [30,31],…”

Section: Validation Of the Jc Materials Model And Materials Parametersmentioning

confidence: 99%

Numerical investigation of the impact behaviour of bioinspired nacre-like aluminium composite plates

Flores‐Johnson

Shen

Guiamatsia

et al. 2014

Composites Science and Technology

134

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Inspired by the hierarchical structure of nacre, an aluminium alloy (AA) 7075 based composite featuring layer waviness and cohesive interface is studied as a low weight impact resistant material. To investigate the mechanical response and the ballistic performance of this laminated structure, a numerical study of the proposed nacre-like composite plates made of 1.1-mm thick AA 7075 tablets bonded with toughened epoxy resin was performed using Abaqus/Explicit. Target thicknesses of 5.4-mm, 7.5-mm and 9.6-mm impacted by a rigid hemi-spherical projectile were simulated. The epoxy material was modelled using a user-defined interface cohesive element with compressive strength enhancement. A significant performance improvement was recorded for the 5.4-mm nacre-like plate (compared to the same thickness bulk plate), which was explained by the hierarchical structure facilitating both localized energy absorption (by deformation of the tablet) and more globalized energy absorption (by inter-layered delamination and friction). For a given projectile, however, the performance improvement of using the proposed composite decreased with increasing laminate thickness, which was attributed to the increased likelihood of ductile failure occurring prior to perforation in thicker bulk plates. For 5.4-mm thick plates impacted at high velocity, the nacre-like plate had a better ballistic performance than that of the plates made of continuous (flat and wavy) layers, which was attributed to the larger area of plastic deformation (observed in the nacrelike plate after impact) due to the tablets arrangement.

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“…Moreover, a substantial amount of studies con cerning the dynamic behaviour of Weldox 460 E can be found in the international literature, mainly dealing with its behaviour during impact (Borvik et al, 1999(Borvik et al, , 2002aDey et al, 2004). The behaviour of the material can be as sumed as isotropic (Børvik et al, 2001).…”

Section: Weldox 46 E Steelmentioning

confidence: 99%

“…Numerical simulation of perforation by application of RK and JC models Impact perforation of steel plates was widely studied in the last decades due to the applications necessary in sev eral engineering fields like aeronautics, automotive or mil itary industries (Borvik et al, 1999;2002a,b;Gupta et al, 2006Gupta et al, , 2007Arias et al, 2008;Rusinek et al, 2008bRusinek et al, , 2008cTeng et al, in press;Piekutowski, 2001;Chocron et al, 2001;Forrestal and Piekutowski, 2000;Dey et al, 2004;Børvik et al, 2005;Chocron et al, 2006;Teng and Wierzbicki, 2006;Voyiadjis and Abu Al Rub, 2006;Rodríguez Martínez et al, 2008). Several works can be found in the international literature dealing with differ ent aspects of the perforation processes, for example, pro jectile geometry (Borvik et al, 2002a,b;Gupta et al, 2006Gupta et al, , 2007Arias et al, 2008;Rusinek et al, 2008b), target thick ness, (Borvik et al, 2003), constitutive relation (Rusinek et al, 2008c), failure criterion (Teng and Wierzbicki, 2006), or material optimization, (Dey et al, 2004).…”

Section: Comparison Between Rk Pb and Jc Constitutive Relations For mentioning

confidence: 99%

Modelling of thermo-viscoplastic behaviour of DH-36 and Weldox 460-E structural steels at wide ranges of strain rates and temperatures, comparison of constitutive relations for impact problems

Klepaczko

Rusinek

Rodríguez-Martínez

et al. 2009

Mechanics of Materials

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a b s t r a c tIn this paper, the thermo viscoplastic behaviour of DH 36 and Weldox 460 E steels is ana lyzed at wide ranges of strain rates and temperatures. These materials are commonly used for naval applications. Thus, they may be subjected to a wide range of exploitation temper atures and at the same time to high strain rates due to accidental impact or explosion. The thermo viscoplastic behaviour of these materials has been modeled by application of RK , and 77 K to about 1000 K). Especially for high strain rate level, the predictions of RK model are notably more precise than those predic tions obtained using PB and JC models. This proof converts RK model in suitable for mod eling impact problems. Finally, numerical simulations of perforation process of DH 36 and Weldox 460 E steel plates impacted by conical non deformable projectiles have been car ried out using RK and JC models. Numerical results using FE simulations have revealed sub stantial influence of the constitutive relation concerning the ballistic limit, residual velocity and failure time predictions for the same initial and boundary conditions.

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The effect of target strength on the perforation of steel plates using three different projectile nose shapes

Cited by 219 publications

References 15 publications

Estimation of fracture toughness, driving force, and fracture energy for fractal cracks using the method of imaginary smooth crack

Estimation of fracture toughness, driving force, and fracture energy for fractal cracks using the method of imaginary smooth crack

Numerical investigation of the impact behaviour of bioinspired nacre-like aluminium composite plates

Modelling of thermo-viscoplastic behaviour of DH-36 and Weldox 460-E structural steels at wide ranges of strain rates and temperatures, comparison of constitutive relations for impact problems

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