计算力学学报2024，Vol.41Issue(4)：682-688,7.DOI:10.7511/jslx20221217001
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
Analysis of crack evolution and mechanical properties degradation of polymer bonded explosives based on phase-field fracture
摘要
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.关键词
高分子黏结炸药/细观形貌/热黏弹性体/断裂相场模型/裂纹演化Key words
Polymer-bonded Explosives/meso-scale morphology/thermal viscoelasticity/fracture phase-field model/crack evolution分类
数理科学引用本文复制引用
龙旭,朱佳琦,苏昱太,姜夕博,金朋刚..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[J].计算力学学报,2024,41(4):682-688,7.基金项目
西安近代化学研究所开放合作创新基金(SYJJ20210409) （SYJJ20210409）
国家自然科学基金(52175148) （52175148）
国防重点实验室基金(2022-JCJQ-LB-006,NO.6142411232212)资助项目. （2022-JCJQ-LB-006,NO.6142411232212）
