Numerical simulation of impact crater formation and distribution of high-pressure polymorphs

He, Liang‐Nian; He, Qi-Guang; Chen, Xiaowei; Han, Ping

doi:10.1016/j.actaastro.2022.11.048

Cited by 9 publications

(2 citation statements)

References 55 publications

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“…The FE-SPH adaptive method provided by the LS-DYNA software combines the advantages of the finite element method and meshless method [50]. It has been successfully applied to the dynamic fracture of explosively driven cylindrical shells [53], hypervelocity impacts [54], and meteorite impact cratering [55] problems. Convincing results have been obtained in the study of structural damage evolution, debris cloud morphology, hazardous debris extraction, shock wave propagation, and material temperature changes.…”

Section: Single-materials Ale Methods and Fe-sph Adaptive Methodsmentioning

confidence: 99%

Numerical Study on Asteroid Deflection by Penetrating Explosion Based on Single-Material ALE Method and FE-SPH Adaptive Method

Peng

Chen

et al. 2023

Aerospace

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An asteroid impact can potentially destroy life on this planet. Therefore, asteroids should be prevented from impacting the Earth to impede severe disasters. Nuclear explosions are currently the only option to prevent an incoming asteroid impact when the asteroid is large or the warning time is short. However, asteroids exist in an absolute vacuum, where the explosion energy propagation mechanism differs from that in an air environment. It is difficult to describe this process using standard numerical simulation methods. In this study, we used the single-material arbitrary Lagrangian–Eulerian (ALE) method and the finite element-smoothed particle hydrodynamics (FE-SPH) adaptive method to simulate the process of deflecting hazardous asteroids using penetrating explosions. The single-material ALE method can demonstrate the expansion process of explosion products and energy coupling in absolute vacuum. The FE-SPH adaptive method can transform failed elements into SPH particles during the simulation, avoiding system mass loss, energy loss, and element distortion. We analyzed the shock initiation and explosion damage process and obtained an effective simulation of the damage evolution, stress propagation, and fragment distribution of the asteroid. In addition, we decoupled the penetrating explosion into two processes: kinetic impact and static explosion at the impact crater. The corresponding asteroid damage modes, velocity changes, and fragmentation degrees were simulated and compared. Finally, the high efficiency of the nuclear explosion was confirmed by comparing the contribution rates of the kinetic impact and nuclear explosion in the penetrating explosion scheme.

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Section: Single-materials Ale Methods and Fe-sph Adaptive Methodsmentioning

confidence: 99%

Numerical Study on Asteroid Deflection by Penetrating Explosion Based on Single-Material ALE Method and FE-SPH Adaptive Method

Peng

Chen

et al. 2023

Aerospace

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“…However, the FEM method also has many problems and limitations in fields such as high-velocity impact and fluid-structure interaction. When phenomena such as large deformations or crack propagation occur, the finite element method often cannot accurately reflect the problem, and the mesh elements are prone to distortion, leading to calculation termination [4,5]. When the material undergoes significant deformation, the element can fail, and after deleting the failed element, the contact interface becomes abnormal [6].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Analysis of Projectile Target Penetration Based on an FE-SPH Adaptive Coupling Method

Zhu

et al. 2023

Metals

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The penetration of projectiles into targets has a broad background in engineering. In this work, numerical simulations of the projectile-target penetration problem are conducted using the Finite Element Method (FEM), the Smoothed Particle Hydrodynamics (SPH) and the Finite Element–Smoothed Particle Hydrodynamics Adaptive Coupling Method (FE-SPH ACM) based on the LS-DYNA software package. First, the penetration experiments using aluminum targets and ceramic targets are simulated. The experimental and simulation results show that the FE-SPH ACM has the better accuracy in calculating the debris cloud head velocity and interface velocity, with an error of no more than 4%. Furthermore, we use the FE-SPH ACM to investigate the anti-penetration performance of aluminum/ceramic composite targets in different combinations. We find that the reasonable layout can improve the protective performance of multi-layered target, especially composite target plates with ceramic as the front layer. In addition, the ballistic limit velocities for ceramic-aluminum ratios of 3/7, 5/5 and 7/3 are approximately 1300 m/s, 1400 m/s and 1500 m/s, respectively. Obviously, increasing the proportion of ceramic materials can enhance the anti-penetration performance.

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Automated astronaut traverses with minimum metabolic workload: Accessing permanently shadowed regions near the lunar south pole

Peña-Asensio,

Sutherland,

Tripathi

et al. 2024

Acta Astronautica

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Numerical simulation of impact crater formation and distribution of high-pressure polymorphs

Cited by 9 publications

References 55 publications

Numerical Study on Asteroid Deflection by Penetrating Explosion Based on Single-Material ALE Method and FE-SPH Adaptive Method

Numerical Study on Asteroid Deflection by Penetrating Explosion Based on Single-Material ALE Method and FE-SPH Adaptive Method

Dynamic Response Analysis of Projectile Target Penetration Based on an FE-SPH Adaptive Coupling Method

Automated astronaut traverses with minimum metabolic workload: Accessing permanently shadowed regions near the lunar south pole

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