Strain Hardening and Strain-Rate Effect in Friction Between Projectile and Barrel During Engraving Process

Wu, Bin; Fang, L. H.; Zheng, Jiang; Yu, Xu-hua; Jiang, Kun; Wang, T.; Hu, Liming; Chen, Y. L.

doi:10.1007/s11249-019-1151-1

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…After substituting Equation (15) into Equation ( 11 F I G U R E 13 Comparison between simulation data and the fitting curve of engraving resistance. (1) The projectile engraving process takes approximately 3.8 ms, accounting for 26% of the whole launch process; the projectile velocity is 143.54 m/s at the end of the engraving process, reaching 15.2% of the muzzle velocity of 925.13 m/s; the chamber mean pressure at the end of the engraving process is 264.96 MPa, which is 85.4% of the maximum chamber mean pressure of 310.24 MPa.…”

Section: Comparison Between the Two Interior Ballistic Modelsmentioning

confidence: 99%

“…Gradually, researchers have shifted their research focus to projectile engraving tests. For example, quasi-static push tests were carried out using an electrohydraulic servo universal testing machine, [9][10][11][12][13][14][15][16] and dynamic push tests were carried out using an impact testing machine 16,17 or a self-developed simulation experiment device based on a truncated gun barrel. [12][13][14][15][18][19][20] Also, a horizontal milling machine and a specially shaped tool were used to recreate the process when a rotating band impacts rifling.…”

mentioning

confidence: 99%

“…For example, quasi-static push tests were carried out using an electrohydraulic servo universal testing machine, [9][10][11][12][13][14][15][16] and dynamic push tests were carried out using an impact testing machine 16,17 or a self-developed simulation experiment device based on a truncated gun barrel. [12][13][14][15][18][19][20] Also, a horizontal milling machine and a specially shaped tool were used to recreate the process when a rotating band impacts rifling. 17 Thereby, the engraving resistance can be tested, and the deformation of a projectile jacket, copper band, and nylon band in the engraving process can be obtained.…”

mentioning

confidence: 99%

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Numerical simulation of the coupled dynamics model of the projectile engraving process

Zhang,

Rui,

et al. 2024

Int Journal of Mech Sys Dyn

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The projectile engraving process directly influences the projectile motion in‐bore and impacts the firing accuracy, firing safety, and barrel life of the gun. For this reason, attention has been focused on this research topic. To address the limitations of the “instantaneous engraving” hypothesis adopted in the classical interior ballistic theory, the VUAMP user subroutine, one of ABAQUS's secondary development interfaces, is utilized in this paper to realize the modeling and numerical simulation of a coupled dynamics model of the projectile engraving process. In addition to facilitating engineering applications, a polynomial fitting formula of the engraving resistance obtained by simulation is proposed and then used as a supplement to establish a closed and solvable interior ballistic model considering the projectile engraving process. By comparing with test data, the simulation accuracy of the coupled dynamics model is verified. Simulation results reveal that the engraving process takes 3.8 ms, accounting for 26% of the whole launch process, which takes 14.6 ms, demonstrating that the process is not instantaneous. The results of this paper can serve as a reference for future studies on the coupled solution of the projectile engraving process and interior ballistics of guns or gun‐like equipment.

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Section: Comparison Between the Two Interior Ballistic Modelsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Numerical simulation of the coupled dynamics model of the projectile engraving process

Zhang,

Rui,

et al. 2024

Int Journal of Mech Sys Dyn

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“…Through the comparison of experimental and numerical results, it was concluded that Johnson-Cook constitutive Model combined with failure model and h-adaptive algorithm was the most suitable method for predicting the axial fracture of EFP. Wu [10][11] used the truncated barrel, hydraulic system and gas gun to simulate the quasi-static and transient engraving process, respectively. by measuring and analyzing the circunferential strain of the outer surface of the barrel during the engraving process and the observing the surface morphology of the copper after the groove, the results show that the strain hardening at low loading speed and the strain rate effect and thermal effect at high loading speed play a key role in the engraving process.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Research on Rotating Band Dynamic Engraving Process of CTA Artillery

Shi

Qian

Chen

et al. 2023

J. Phys.: Conf. Ser.

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In order to study the mechanical mechanism of the dynamic engraving process of the CTA band, the simulation model of the engraving process is established considering the friction and contact characteristics between the interfaces. The adaptive FEM-SPH coupling algorithm is used to obtain the variation law of the temperature and stress distribution of the band, the attitude of the projectile, and the dynamic engraving resistance through numerical calculation. The results show that the band undergoes plastic flow during engraving, and the surface temperature of the band is close to the melting point temperature of the material during the adiabatic engraving. The engraving process presents obvious segmented characteristics, and the initial engraving speed has an important influence on the spatial projectile attitude. The variation of dynamic engraving resistance is quite different from that of the quasi-static model, and the resistance has two ‘rising-decreasing’ processes.

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“…Existing researches have shown that excessive wear of the chamber throat is one of the key factors limiting barrel life [12][13][14]. In the dynamic engraving process, the projectile imposes an impact load on the barrel, accompanied by high-speed friction, resulting in the adhesive wear and secondary abrasive wear [15].…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation on dynamic engraving process of small caliber armor-piercing projectile with lead-free aluminum filler

Zhang

Liu

et al. 2023

J. Phys.: Conf. Ser.

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In order to reduce the ineffective armor-piercing weight of the small caliber armor-piercing projectile, improve combat effectiveness, and reduce the pollution of lead fillers to the environment, a projectile with aluminum filler was proposed. Taking the small caliber armor-piercing projectile as the research object, using explicit dynamic methods and coupling the classical internal ballistic equations, a numerical simulation model of bullet–barrel interactions during dynamic engraving process was established. And the reliability of the model was verified by the dynamic engraving experiment. Besides, using copper and copper-clad steel (CCS) as the jacket material, and aluminum and lead as the filler material, numerical simulation studies of four schemes were carried out. The result shows that, the aluminum filler projectile will cause a slight increase in the maximum chamber pressure and a slight decrease in the muzzle velocity of the projectile, an increase in the sliding friction force and a decrease in the maximum deformation force, an increase in the contact stress on both sides of the land and a decrease in the contact stress on the land and groove. And the contact stress on the non-driving side is larger than that on the driving side. The average contact stress and the engraving resistance of the Cu-Al case and CCS-Pb case are very close. And the application of Cu-Al projectile may improve the shooting accuracy in the hot barrel conditions compared with Cu-Pb projectile, and achieve the same performance as CCS-Pb projectile.

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Strain Hardening and Strain-Rate Effect in Friction Between Projectile and Barrel During Engraving Process

Cited by 8 publications

References 19 publications

Numerical simulation of the coupled dynamics model of the projectile engraving process

Numerical simulation of the coupled dynamics model of the projectile engraving process

Numerical Simulation Research on Rotating Band Dynamic Engraving Process of CTA Artillery

Modeling and simulation on dynamic engraving process of small caliber armor-piercing projectile with lead-free aluminum filler

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