基于断裂相场的高分子黏结炸药裂纹演化 及其力学性能退化分析

Translated title of the contribution: Analysis of crack evolution and mechanical properties degradation of polymer bonded explosives based on phase-field fracture

Xu Long, Jia Qi Zhu, Yu Tai Su, Xi Bo Jiang, Peng Gang Jin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In order to analyze the crack evolution process of polymer-bonded explosives (PBXs) and their mechanical behavior, a thermal-viscoelastic phase-field fracture model is proposed by considering the influence and mechanism of their elastic. viscous and thermal properties. Based on the proposed phase field fracture model, a one-element model of the thermal-viscoelastic material is established, and the parameters are analyzed for different temperatures and strain rates. Then, based on the PBX. the simulation of the fracture phase field is performed and the model parameters are calibrated. Thus, based on the fracture phase field.the crack evolution of PBX material and its mechanical property degradation are further clarified from the meso-scale level under different strain rates and different ambient temperatures. The results show that the fracture driving energy and compressive strength tend to decrease with decreasing strain rate and increasing temperature, which delays the crack occurrence and the impede the crack propagation.

Translated title of the contributionAnalysis of crack evolution and mechanical properties degradation of polymer bonded explosives based on phase-field fracture
Original languageChinese (Traditional)
Pages (from-to)682-688
Number of pages7
JournalJisuan Lixue Xuebao/Chinese Journal of Computational Mechanics
Volume41
Issue number4
DOIs
StatePublished - Aug 2024

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