Experimental and theoretical study of mechanical behavior of 1100 aluminum in the strain rate range 10−5−104s−1

Khan, Akhtar S.; Huang, Sujian

doi:10.1016/0749-6419(92)90057-j

Cited by 221 publications

(75 citation statements)

References 14 publications

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“…Here, a bullet-shape projectile with the same volume of the spherical specimen used in [6] was used, Fig. 2.…”

Section: Experiments Setupmentioning

confidence: 99%

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Investigation on grain size effect in high strain rate ductility of 1100 pure aluminum

Bonora¹,

Bourne²,

Ruggiero³

et al. 2017

AIP Conference Proceedings

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“…Here, a bullet-shape projectile with the same volume of the spherical specimen used in [6] was used, Fig. 2.…”

Section: Experiments Setupmentioning

confidence: 99%

“…Details on the derivation of these equations can be found elsewhere (Bonora, et al [5]). The parameters of the MRK2 model for AA1100-0 were calibrated using the experimental data given in Khan and Huang [6] and are reported in Table 1. The value of was taken according to [7].…”

Section: Constitutive Model and Numerical Simulation Of Dte Testmentioning

confidence: 99%

Investigation on grain size effect in high strain rate ductility of 1100 pure aluminum

Bonora¹,

Bourne²,

Ruggiero³

et al. 2017

AIP Conference Proceedings

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“…Also, some inadequacies and contradictions are found in the published modeling efforts. The constitutive models used for high strain rate applications can be classified in two categories; the purely phenomenological ones, e.g., Johnson-Cook (JC) and Khan-Huang-Liang (KHL) models (Khan and Huang, 1992; Zhang, 2000, 2001) and so-called, ''physically based models'' e.g., the ones by Zerilli and Armstrong (1987), Mecking and Kocks (1981), etc., that were used frequently by , and in a modified form by . The latter group discusses the mechanisms of plastic deformation, mainly dislocations.…”

Section: Executive Summary Of Achievements Imentioning

confidence: 99%

Dynamic Multi-Axial Loading Response and Constitutive/Damage Modeling of Titanium and Titanium Alloys

Khan¹

2006

Self Cite

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Research ObjectivesTitanium alloys, and ceramics encapsulated in titanium alloys are considered for next generation of lightweight tanks. The objectives of this research project are to obtain responses of newly developed economical, but with much higher Oxygen content, Ti6Al-4V alloys, determine the suitability of existing constitutive relations to model these responses, and to determine material constants for these models (e.g., JC and KHL models) for incorporation in computer codes for penetration simulation.These objectives are being achieved through uniaxial loading experiments over a wide range of strain rates and temperatures in the first year of funding, and through multi-axial loading experiments over a wide strain rate range and a wide temperature range in the second and third year of funding, respectively. ApproachUniaxial compressive experiments, over a wide range of strain rates and temperatures, are used to determine material constants for two constitutive models (Johnson-Cook and Khan-Huang-Liang); experiments are performed on several titanium (Ti-6Al-4V) alloys. The results from these models are correlated to these experimental data to demonstrate the flexibility in each model. Most other investigators who have performed similar studies, stopped at this stage. The approach taken by other scientists is not right because if correlations are done with the same experiments from which the material constants are determined, then correlations should be always good for any constitutive model. We have gone one step further, which is very desirable, if not required, to validate a constitutive model. In the phase of the current year of funding, multi-axial loading experiments (e.g. dynamic torsion followed by dynamic compression using Kolsky or split Hopkinson bar technique, uniaxial compression followed by biaxial compression, etc) have been performed and compared to predictions from these two constitutive models to establish validity of these two models over a wide ranges of strain rates and temperatures. BackgroundSince the introduction of titanium and titanium alloys around 1950, they have become important materials for aerospace, energy, and chemical industries. They are used chiefly for parts that require good corrosion resistance, moderate strength up to 588 K, and lightweight. Titanium alloys, especially Ti-6Al-4V, an α+β type titanium alloy is largely used alloy in many industries because of its extremely attractive properties like high specific strength, good deformability, reasonable ductility and ability to withstand high temperatures and resistance to corrosion. It is primarily used in aero-engine, gas turbines and other applications. The development of a relatively economical Ti-6Al-4V alloy, with a low interstitial content has prompted a lot of interest in its possible use in armor tanks because of improved ductility, whereas the conventional more expensive Ti6Al-4V alloy has been used primarily in aerospace components chiefly because of its high strength to weight ratio. This advantage has al...

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“…For example, the Johnson-Cook model [27], Zerilli-Armstrong model [28], and Khan-Huang-Liang model [29][30][31][32]. These models have improved the constitutive descriptions of the dynamic plasticity of metals and have described the strain, strain-rate, and temperature relations for metals in large strain and high strain-rate regimes.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the above mentioned theories, some new models have been proposed in recent years [26][27][28][29][30][31][32]. For example, the Johnson-Cook model [27], Zerilli-Armstrong model [28], and Khan-Huang-Liang model [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

A new thermo-elasto-plasticity constitutive theory for polycrystalline metals

2015

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In this study, the behavior of polycrystalline metals at different temperatures is investigated by a new thermo-elasto-plasticity constitutive theory. Based on solid mechanical and interatomic potential, the constitutive equation is established using a new decomposition of the deformation gradient. For polycrystalline copper and magnesium, the stress-strain curves from 77 to 764 K (copper), and 77 to 870 K (magnesium) under quasi-static uniaxial loading are calculated, and then the calculated results are compared with the experiment results. Also, it is determined that the present model has the capacity to describe the decrease of the elastic modulus and yield stress with the increasing temperature, as well as the change of hardening behaviors of the polycrystalline metals. The calculation process is simple and explicit, which makes it easy to implement into the applications.

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Experimental and theoretical study of mechanical behavior of 1100 aluminum in the strain rate range 10−5−104s−1

Cited by 221 publications

References 14 publications

Investigation on grain size effect in high strain rate ductility of 1100 pure aluminum

Investigation on grain size effect in high strain rate ductility of 1100 pure aluminum

Dynamic Multi-Axial Loading Response and Constitutive/Damage Modeling of Titanium and Titanium Alloys

A new thermo-elasto-plasticity constitutive theory for polycrystalline metals

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