Plasticity, ductile fracture and ballistic impact behavior of Ti-6Al-4V Alloy

Wu, Shuaitao; Zhou, Chuwei; Shi, Yahui; Hu, Ang; Xiao, Xinke

doi:10.1016/j.ijimpeng.2023.104493

Cited by 9 publications

(3 citation statements)

References 45 publications

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“…However, these structures are often subjected to unwanted though unavoidable impact incidents, which cover a wide range of shapes and velocities of the involved objects, due to various uncontrollable reasons like maintenance damage from dropped tools, bird impact or hail. Therefore, sufficient impact resistance is another criterion that needs to be satisfied for these structures and the study of their impact behaviour is a major research area [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Hydrocode numerical modeling of projectile impact on moving aluminum targets

Kalfountzos,

Bikakis,

Theotokoglou

2024

J. Phys.: Conf. Ser.

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This paper deals with the investigation of high velocity normal impacts of a rigid cylindrical projectile on moving aluminum plates. The targets are supported with mixed boundary conditions which permit their rigid body motion in the plane perpendicular to the initial striker’s trajectory with a predetermined initial velocity. A 3D numerical modeling procedure based on the finite difference method is implemented for this problem with the ANSYS AUTODYN hydrocode. The Johnson-Cook plasticity and damage models are used for the aluminum target. The numerical modeling is validated through suitable comparisons with experimental data concerning stationary targets. The effect of striker’s and target’s initial velocities is studied on the projectile’s trajectory and the striker’s energy loss after the full perforation of the target. It is found that the energy loss of the striker’s kinetic energy is higher for relatively higher values of the projectile’s velocity. The striker’s energy loss decreases as the velocity of the target increases. Diagrams of the energy time-histories of the striker-target system are constructed for different initial velocities of the plate and the projectile. It is observed from these diagrams that the internal energy of the plate depends mainly on the plastic work.

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Section: Introductionmentioning

confidence: 99%

Hydrocode numerical modeling of projectile impact on moving aluminum targets

Kalfountzos,

Bikakis,

Theotokoglou

2024

J. Phys.: Conf. Ser.

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“…Based on Q345B steel, the "false steel-concrete composite structures" was proposed and the seismic performance of it was analyzed by Huang et al [95]. Xiao and his coworkers simulated the failure process of 316L austenitic stainless steel [61], Ti-6Al-4V Alloy [96] and 6061-T651 Al [97] target plates that were impacted by blunt rigid projectiles using the Lode-dependent MMC, Lou fracture criterion, and Lode-independent JC fracture criterion and analyzed the effect of the Lode parameter on the prediction of the ballistic limit velocity in FE simulations. Hence, compared to the Lode-independent fracture criteria, the prediction accuracy of FE simulations for Taylor impact or ballistic tests was effectively improved by incorporating the Lode parameter.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Dynamic Mechanical Properties of Q460D Steel

Huang,

Lin,

et al. 2023

Metals

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The dynamic mechanical properties of Q460D steel were studied to facilitate an assessment of the impact resistance of building structures. In the present work, material performance tests of Q460D steel at different temperatures, strain rates, and stress states were conducted. Using a hybrid experimental–numerical approach, a modified Johnson–Cook (JC) constitutive relation, a modified Johnson–Cook (JC) fracture criterion, and a lode-dependent fracture criterion were calibrated. To validate the calibration, Taylor impact tests of Q460D steel rods onto rigid target plates were carried out in a one-stage light-gas gun system. Mushrooming, tensile splitting, and petalling failure modes were obtained as the impact velocity was increased from 191.6 to 422.1 m/s. A three-dimensional finite element model was built for the Taylor impact tests, and FE simulations were run using the material models calibrated. It was found that the FE simulations using the lode-dependent fracture criterion were reasonable in terms of the failure modes of the Taylor rods. In contrast, the fracture behavior of the Taylor rods was significantly underestimated using the lode-independent JC fracture criterion. Finally, the effect of anisotropy, strain rate sensitivity and yield plateau on the Taylor impact FE predictions were explored and discussed.

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“…Meanwhile, it has earned the moniker "space metal", "bio-metal", and "ocean metal", among others [4,5]. Ti-6Al-4V is one of the most extensively used commercial titanium alloys and a typical representative of titanium alloy [6][7][8]. Powder metallurgy is a high-efficiency, material-saving material processing and preparation technology for titanium alloy [9,10].…”

Section: Introductionmentioning

confidence: 99%

Inverse Identification of Drucker–Prager Cap Model for Ti-6Al-4V Powder Compaction Considering the Shear Stress State

Li,

Liu,

et al. 2023

Metals

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Numerical simulation is an important method to investigate powder-compacting processes. The Drucker–Prager cap constitutive model is often utilized in the numerical simulation of powder compaction. The model contains a number of parameters and it requires a series of mechanical experiments to determine the parameters. The inverse identification methods are time-saving alternatives, but most procedures use a flat punch during the powder-compacting process. It does not reflect the densification behavior under a shearing stress state. Here, an inverse identification approach for the Drucker–Prager cap model parameters is developed by using a hemispherical punch for the powder-compacting experiment. The error between the numerical and experimental displacement–load curves was minimized to identify the Drucker–Prager cap model of titanium alloy powder. The identified model was then verified by powder-compacting experiments with the flat punch. The displacement–load curves acquired by numerical simulation were compared to the displacement–load curves obtained through experiments. The two curves are found to be in good agreement. Meanwhile, the relative density distribution of the powders is similar to the experimental results.

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Plasticity, ductile fracture and ballistic impact behavior of Ti-6Al-4V Alloy

Cited by 9 publications

References 45 publications

Hydrocode numerical modeling of projectile impact on moving aluminum targets

Hydrocode numerical modeling of projectile impact on moving aluminum targets

A Study of the Dynamic Mechanical Properties of Q460D Steel

Inverse Identification of Drucker–Prager Cap Model for Ti-6Al-4V Powder Compaction Considering the Shear Stress State

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