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西安近代化学研究所, 陕西 西安 710065
Received:23 July 2024,
Published Online:12 August 2025,
Published:31 July 2025
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Hanwen LIU, Xiaolong FU, Jiangning WANG, et al. Research on Fracture Failure of NEPE Propellant Based on Peridynamics[J]. Acta Armamentarii, 2025, 46(7): 240613.
Hanwen LIU, Xiaolong FU, Jiangning WANG, et al. Research on Fracture Failure of NEPE Propellant Based on Peridynamics[J]. Acta Armamentarii, 2025, 46(7): 240613. DOI: 10.12382/bgxb.2024.0613.
开展了硝酸酯增塑聚醚(Nitrate Ester Plasticized Polyether
NEPE)推进剂在100mm/min拉伸速率下的单边缺口张力实验
研究了NEPE推进剂裂纹扩展过程中的力学响应、裂纹形态和演化路径。基于键型近场动力学理论
模拟了NEPE推进剂的裂纹扩展失效过程
计算了断裂韧性临界应力强度因子
并提出了与应力强度因子相关的考虑推进剂燃速的断裂准则。实验结果表明:NEPE推进剂在裂纹扩展过程中会出现钝化断裂现象;宏观裂纹扩展发生之前
推进剂内部就已出现损伤。键型近场动力学方法可以准确模拟NEPE推进剂的裂纹扩展过程、计算应力强度因子并可视化推进剂内部的损伤情况
说明近场动力学方法能够为NEPE推进剂断裂过程的数值模拟提供新的方法。
The mechanical response
crack morphology and evolutionary path of NEPE propellant during the crack propagation are investigated through single-edge notched tension (SENT) experiment at a tensile rate of 100mm/min.Based on the bond-based peridynamic (BBPD) theory
the failure process of crack propagation in NEPE propellant is simulated
the critical stress intensity factor of fracture toughness is calculated
and a fracture criterion considering the burning rate of the propellant is proposed.Experimental results show that a blunting fracture occurs in NEPE propellant during crack propagation.Prior to macroscopic crack propagation
an internal damage takes place in the propellant.The BBPD method can accurately simulate the crack propagation process of NEPE propellant
compute the stress intensity factor
and visualize the internal damage.This suggests that the peridynamic technique provides a new approach to simulate the fracture process of NEPE propellant.
WANG Y L , RONG H , ZHANG X H , et al. Influences of Bu-NENA and BDNPA/F plasticizers on the properties of binder for high-energy NEPE propellants [J ] . Propellants, Explosives,Pyrotechnics , 2021 ,46: 950 - 961 .
胡少青 , 鞠玉涛 , 常武军 , 等 . NEPE固体推进剂粘-超弹性本构模型研究 [J ] . 兵工学报 , 2013 , 34 ( 2 ): 168 - 173 . DOI: 10.3969/j.issn.1000-1093.2013.02.007 http://doi.org/10.3969/j.issn.1000-1093.2013.02.007 为了准确描述NEPE固体推进剂在有限变形下的力学特性,本文针对NEPE推进剂在有限变形下的粘超弹本构模型进行研究。模型由超弹部分与粘弹部分并联构成:超弹部分采用Yeoh模型,粘弹部分采用非线性粘弹性本构模型。进行NEPE推进剂单轴拉伸试验及拉伸松弛试验,并用试验结果拟合超弹及粘弹两部分的材料参数。所建本构模型与实验结果进行了对比,模型能较好的预测30%应变内的NEPE推进剂的力学性能。
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HOU Y F , XU J S , GU Y J , et al. Mesoscopic model of cracking process of NEPE propellant based on cohesive zone model [J ] . Acta Armamentarii , 2020 , 41 ( 11 ): 2206 - 2215 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2020.11.007 http://doi.org/10.3969/j.issn.1000-1093.2020.11.007 For the sake of acquiring the mesoscopic damage mechanism of nitrate ester plasticized polyether (NEPE) propellants, a random particle model based on the molecular dynamics theory is established. The zero-thickness cohesive elements are embedded in the matrix and interface in random particle model by using Python scripting language. Considering the ductile failure of NEPE propellant, a novel polynomial-trapezoidal cohesive zone model is presented based on polynomial cohesive zone model, and a vectorized user defined material subroutine VUMAT is developed. By comparing the numerical results of particle/matrix interface dewetting model and matrix damage model, it can be concluded that the particle/matrix interface dewetting of NEPE propellants causes formation of the holes in the matrix, and the high stress around the holes is the major factor that leads to the cracking of propellants. Experimental results validate that the polynomial-trapezoidal cohesive zone model can describe the cracking process of NEPE propellants more accurately compared to bilinear cohesive zone model and polynomial cohesive zone model.
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HAN B , JU Y T , XU J S , et al. Simulation of crack propagation in HTPB propellant using cohesive zone model [J ] . Journal of Ballistics , 2012 , 24 ( 1 ): 63 - 68 . (in Chinese) To investigate the crack propagation in Composite Solid Propellant(CSP),the cohesive zone model was used to establish physical and mathematical model for the fracture process of CSP,and the cohesive element formulation was derived.Numerical simulation of crack propagation was carried out by using ABAQUS second development technology.The crack path and stress changes of crack tip in HTPB propellant containing Ⅰ-Ⅱ mixed mode crack were obtained.The influence of cohesive zone constitutive parameter on simulation results was analyzed to determine its scope.The numerical simulation result was compared with experimental result.The results show that by the developed numerical simulation method,the damage stress field of crack tip of CSP can be accuratelly simulated and the crack propagation can be predicted.The cohesive zone model offers analysis method for analyzing the integrality and safety of propellant grain.
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龙兵 , 常新龙 , 方鹏亚 , 等 . 含裂纹固体推进剂试件抗拉强度的预估 [J ] . 火炸药学报 , 2014 , 37 ( 2 ): 65 - 68 . 设计了以新型碳系纳米材料(CN)为载体的负载燃速催化剂BC-1/CN和BC-2/CN,通过热重(TG)分析和差示扫描量热法(DSC)联用研究了负载燃速催化剂对AP热分解行为的影响,研究了负载燃速催化剂种类和含量对NEPE推进剂燃烧性能的影响。结果表明,CN能够增强BC-1和BC-2对AP热分解的催化作用,从而显著降低AP的分解温度;随着负载燃速催化剂中CN含量的提高,NEPE推进剂在15MPa下的燃速由15.72mm/s增至24.68mm/s,增幅达57%,压强指数由0.60降至0.46;当负载燃速催化剂中CN的质量分数为10%时,NEPE推进剂的燃速高达34.8mm/s,而药浆的工艺性能没有明显恶化,综合作用效果最好。
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