A Method for Calculating the JWL Equation of State Parameters for the Detonation Products of CL-20-Based Aluminized Explosives

Mao, Xiaoxiang; Zheng, Yanying; Shen, Fei; Wang, Yinglin; Wang, Xiaoming; Li, Yiming

doi:10.1080/07370652.2020.1854370

Cited by 7 publications

(1 citation statement)

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“…DYNA-2D two-dimensional fluid dynamics software was utilized to simulate the cylinder test. Both the Johnson–Cook constitutive model and the Gruneisen equation of state [ 39 ] were applied for the copper tube. The simulation results are presented in Figure 5 , illustrating the expansion curve of the cylinder wall.…”

Section: Thermodynamic State Of Detonation Productsmentioning

confidence: 99%

Investigation of the Fracture and Fragmentation of Implosively Driven Thin-Walled Cylindrical Shell: From Thermodynamic Analysis to CDEM Simulation

Ou¹,

Yuan²,

Jiao³

et al. 2023

Materials

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The scattering of fragments is a notable characteristic of the explosive detonation of a shelled charge. This study examines the fracture and fragmentation of the shell and the process by which natural fragments form under the strains of implosion. The analysis takes into account both the explosive’s energy output and the casing’s dynamic response. For this purpose, utilizing a thermochemical code as an alternative to the conventionally employed cylinder test, the Jones–Wilkins–Lee equation of state (JWL EOS) was calibrated within a range of relative specific volume up to 13. The detonation of the shelled charge was subsequently analyzed using the continuum–discontinuum element method (CDEM). Following this, the formation mechanisms and scattering characteristics of natural fragments were scrutinized. The analysis found that the shell predominantly experiences shear failure with uniform evolution, displaying a “hysteresis effect” and two mutation stages in the evolution of tensile failure. Within the JWL EOS’s calibrated range, the representation of fragment displacement and velocity improved by 47.97% and 5.30%, respectively. This study provides valuable guidance for designing the power field of warheads and assessing their destructive power.

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Section: Thermodynamic State Of Detonation Productsmentioning

confidence: 99%