Numerical study on the resistance of rigid projectiles penetrating into semi-infinite concrete targets

Yang, Huawei; Zhang, Jie; Wang, Zhiyong; Wang, Zhihua; Li, Q. M.

doi:10.1007/s10409-021-01054-6

Cited by 7 publications

(9 citation statements)

References 35 publications

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“…Based on the numerical results, the critical velocities are 270.8 m/s (i.e., normalΦJ = 1.47) and 279.8 m/s (i.e., normalΦJ = 1.57) for the projectiles with initial velocities of 800 m/s and 700 m/s, while the critical values are 166.0m/s (i.e., normalΦJ = 0.55) and 194.5 m/s (i.e., normalΦJ = 0.76) for the projectiles with initial velocities of 600m/s and 500m/s, respectively. Although the critical value may be affected by the randomness of distributed aggregates, it is significantly larger for projectile with initial velocity larger than 600 m/s, which maybe because the projectile with smaller initial velocity is suffered the smaller static resistance ( Forrestal et al, 2003; Yang et al, 2021).…”

Section: Analysis and Discussionmentioning

confidence: 99%

Penetration trajectory of rigid projectile in the heterogeneous meso-scale concrete target

Zhang

Zhi-yong

Wang

et al. 2022

Advances in Structural Engineering

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For the normal penetration of a symmetrical rigid projectile into a concrete target with coarse aggregates, the lateral deflection may occur under certain conditions depending on geometrical parameters of the projectile, impact velocity and coarse aggregate distribution. In this work, four dimensionless numbers of projectile, that is, impact factor [Formula: see text], length-to-diameter ratio [Formula: see text], nose factor [Formula: see text] and the relative location of mass center [Formula: see text], are employed to study the effects of projectile parameters on the deflection of penetration trajectory. Numerical studies based on three-dimensional (3D) meso-scale concrete model are conducted and the projectile trajectories are obtained under different dimensionless numbers. According to the development of the deflection angle during the rigid projectile penetration into meso-scale concrete, the motion of the projectile can be divided into four stages, that is, initial deflection, rapid change, deflection rebound and final stage. The numerical results show that, for the same meso-scale concrete target, the deflection of the projectile trajectory becomes larger with the increases of [Formula: see text], [Formula: see text] and [Formula: see text], while the deflection angle of projectile decreases with the increase of [Formula: see text].

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Section: Analysis and Discussionmentioning

confidence: 99%

Penetration trajectory of rigid projectile in the heterogeneous meso-scale concrete target

Zhang

Zhi-yong

Wang

et al. 2022

Advances in Structural Engineering

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“…Other parameters were fine-tuned based on the parameters in Refs. [17,21,22]. The RHT model parameters for granite are listed in Table 4.…”

Section: Materials Modelsmentioning

confidence: 99%

“…Yang [26] found through numerical simulations that when the impact velocity is less than 600 m/s, the static resistance can be calculated by Formula (10): R a = 97.1 × (V/V R ) p f 0.43 c (10) where V R = 600 m/s, and the parameter p is a dimensionless parameter obtained by fitting, for ordinary concrete, p = 0.874.…”

Section: Effect Of Striking Velocitymentioning

confidence: 99%

“…The targets were subjected to projectile penetration at velocities between 300 m/s and 1000 m/s. In their study, Yang [17] employed the Riedel-Hiermaier-Thoma (Mat_RHT) model to clarify the penetration resistance performance of 35 MPa concrete when subjected to projectile penetration. The results suggest that at low-impact speeds (about <600 m/s), the dynamic resistance is influenced by both the compressive strength and initial impact velocity.…”

Section: Introductionmentioning

confidence: 99%

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Discussion on Static Resistance of Granite under Penetration

Nie

Wu²,

Zhi³

et al. 2023

Materials

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A total of 9 tests were carried out with 30 mm and 78 mm caliber scaled projectiles penetrating into granite targets. The penetration depth, crater diameter, and mass loss rate were examined and discussed. The results indicate that the dimensionless penetration depth of large-caliber projectiles is 20% greater than small-caliber projectiles. Based on the description of static resistance Ra in the Forrestal semi-empirical formula, the size effect of dimensionless penetration depth can be attributed to the size effect of static resistance Ra, and it can be seen that the penetration static resistance of projectile A is 40% higher than that of projectile B. Numerical simulations of projectile penetration into granite targets were conducted using the finite element program ANSYS/LS-DYNA. In terms of penetration depth and crater damage, the numerical simulation results agree well with the test data. This suggests that the selection of parameters was reasonable. The influence of compressive strength, projectile striking velocity, mass, diameter, and caliber–radius–head (CRH) ratio on the static resistance Ra were studied by RHT model parameterization. Based on the numerical results from the parametric study, an empirical formula was derived to predict the static resistance Ra.

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“…With the continuous improvement of protective requirements, the strength of concrete also continues to improve. Chen Xingming et al 14 analyzed the applicability of the empirical formula for penetration depth to high-strength concrete penetration, and conducted research and analysis on relevant experiments; Zhang Xueyan et al 15 compared the penetration tests of two different strength concrete types, C35 and C60, and analyzed the penetration depth of the projectile in the tests. They found that high-strength concrete not only improved its penetration resistance, but also had greater damage to the surface of the target plate; On the basis of these studies, Lv Yingqing et al 16 studied the mechanism of high-speed projectile penetration into ultra-high performance concrete, analyzed the penetration depth of the projectile in the experiment, and discussed the influence of steel fibers on the penetration results.…”

Section: Introductionmentioning

confidence: 99%

Research on the factors influencing the process of prefabricated fragments penetrating finite thickness concrete

Wang,

Li,

Yin

et al. 2024

Sci Rep

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The damage to the back of the target plate is a phenomenon that occurs when concrete is subjected to high-speed impact. In order to study the motion parameters of prefabricated spherical fragments penetrating finite thickness concrete targets at high speeds and the occurrence rules of concrete damage, as well as the impact of target back damage on the motion of fragments, experiments were conducted on 100 mm finite thickness concrete targets with prefabricated spherical fragments. The concrete model parameters in LS-DYNA were modified based on the residual velocity of fragments, and numerical simulations were conducted on the penetration of prefabricated fragments with different impact velocities and concrete target plates with different thicknesses. By analyzing the location of concrete target plate damage, the relationship between concrete thickness and concrete damage was obtained; Combining the motion parameters of fragment penetration process, the phenomenon of concrete collapse was linked to fragment motion, and the influence of concrete thickness on fragment motion parameters was analyzed. The results indicate that the thickness of the finite thickness concrete target plate and the penetration speed of fragments have a significant impact on the damage state of the target back, and further affect the motion change response stage during the penetration process of prefabricated fragments.

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Numerical study on the resistance of rigid projectiles penetrating into semi-infinite concrete targets

Cited by 7 publications

References 35 publications

Penetration trajectory of rigid projectile in the heterogeneous meso-scale concrete target

Penetration trajectory of rigid projectile in the heterogeneous meso-scale concrete target

Discussion on Static Resistance of Granite under Penetration

Research on the factors influencing the process of prefabricated fragments penetrating finite thickness concrete

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