Research on Fracture Failure of NEPE Propellant Based on Peridynamics

doi:10.12382/bgxb.2024.0613

Abstract

Abstract:

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.

Key words: NEPE propellant, fracture property, peridynamics, crack propagation, stress intensity factor

LIU Hanwen, FU Xiaolong, WANG Jiangning, MENG Saiqin. Research on Fracture Failure of NEPE Propellant Based on Peridynamics[J]. Acta Armamentarii, 2025, 46(7): 240613-.

Figures/Tables 10

Fig.1 NEPE propellant specimens and experimental setup

Fig.2 Material point x and horizon Hx

Fig.3 Load-displacement curve of SENT experiment

Fig.4 The entire process of crack propagation (local area in crack tip)

Fig.5 BBPD model of NEPE propellant

Table 1 Material parameters for simulation

密度/(g·cm^-3)	初始模量/MPa	能量释放率/(J·m^-2)
1.82	5.998	2412.11

Fig.6 BBPD model (local area):calculated results at 100mm/min tensile rate

Fig.7 Comparisons between experimental and simulation curves (vy=100mm/min)

Fig.8 Damage nephogram of crack during tensile process

Table 2 The critical stress intensity factors obtained by experiment and simulation

项目	K_dc/(MPa·mm^0.5)	K_IC/(MPa·mm^0.5)
实验	1.81	2.06
仿真	1.67	1.86

References 33

[1]	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.
[2]	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
	HU S Q, JU Y T, CHANG W J, et al. A visco-hyperelastic constitutive behaviour of NEPE propellant[J]. Acta Armamentarii, 2013, 34(2):168-173. (in Chinese)
[3]	侯宇菲, 许进升, 古勇军, 等. 基于内聚力法则的高能硝酸酯增塑聚醚推进剂开裂过程细观模型[J]. 兵工学报, 2020, 41(11):2206-2215.
	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
[4]	HU Q W, FANG Q Z, SHA B L, et al. Study on the viscoelastic damage properties of NEPE solid propellant with different cyclic stress ratios[J]. Propellants, Explosives,Pyrotechnics, 2022,47:e202100342.
[5]	XING R S, WANG L, ZHANG F T, et al. Mechanical behavior and constitutive model of NEPE solid propellant in finite deformation[J]. Mechanics of Materials, 2022,172:104383.
[6]	JIANG Q Q, LÜ X, CUI H R, et al. Computational technique for crack propagation simulation in viscoelastic solid propellant[J]. International Journal of Aerospace Engineering, 2023,2023:8827953.
[7]	韩波, 鞠玉涛, 许进升, 等. 基于粘聚区模型的推进剂开裂数值仿真[J]. 弹道学报, 2012, 24(1):63-68.
	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)
[8]	LI M. Mechanical behaviors and constitutive relations under wide strain rate range for CMDB propellant[J]. Polymer Testing, 2022,116:107806.
[9]	ZHANG H L, LIU M, MIAO Y G, et al. Dynamic mechanical response and damage mechanism of HTPB propellant under impact loading[J]. Materials, 2020,13:3031.
[10]	强洪夫, 王稼祥, 王哲君, 等. 复合固体推进剂强度、损伤与断裂失效研究进展[J]. 火炸药学报, 2023, 46(7):561-588.
	QIANG H F, WANG J X, WANG Z J, et al. Research progress on strength,damage and fracture failure of composite solid propellants[J]. Chinese Journal of Explosives & Propellants, 2023, 46(7):561-588. (in Chinese)
[11]	WANG T Y, XU J S, LI H, et al. Crack propagation velocity and fracture toughness of hydroxyl-terminated polybutadiene propellants with consideration of a thermo-viscoelastic constitutive model:Experimental and numerical study[J]. Theoretical and Applied Fracture Mechanics, 2023,124:103732.
[12]	汪文强, 郑健, 许进升, 等. AP/Al/CMDB推进剂的断裂特性实验研究[J]. 推进技术, 2015, 36(11):1728-1733.
	WANG W Q, ZHENG J, XU J S, et al. Research on fracture mechanism of AP/Al/CMDB propellant[J]. Journal of Propulsion Technology, 2015, 36(11):1728-1733. (in Chinese)
[13]	WANG T Y, XU J S, LI H, et al. Crack propagation velocity and fracture toughness of hydroxyl-terminated polybutadiene propellants:Experiments and simulations[J]. Engineering Fracture Mechanics, 2021,257:108034.
[14]	CUI H. Numerical simulation of crack propagation in solid propellant with extrinsic cohesive zone model[J]. Meccanica, 2022, 57(7):1617-1630.
[15]	吕志. 固体推进剂药柱裂纹扩展分析[D]. 哈尔滨: 哈尔滨工业大学, 2013.
	LÜ Z. The analysis on crack growth of solid propellant[D]. Harbin: Harbin Institute of Technology, 2013. (in Chinese)
[16]	GAO B, LI Z, JI Y C. Experimental and XFEM simulation research on HTPB propellant precracks based on microscopic observation and DIC[J]. Propellants,Explosives,Pyrotechnics, 2022, 47(6):e202200037.
[17]	MANDENCI E, OTERKUS E. Peridynamic theory and its applications[M]. New York,NY, US:Springer, 2014.
[18]	SILLING S A. Reformulation of elasticity theory for discontinuities and long-range forces[J]. Journal of the Mechanics and Physics of Solids, 2000,48:175-209.
[19]	SILLING S A, ASKARI E. A meshfree method based on the peridynamic model of solid mechanics[J]. Computers & Structures, 2005,83:1526-1535.
[20]	DENG X L, ZHAO J B, HUANG Y F. Peridynamic modeling of damage and non-shock ignition behavior of confined polymer bonded explosives under impact loading[J]. Physical Scripta, 2023,98:035228.
[21]	黄亚飞, 邓小良, 柏劲松. 炸药晶粒包覆结构对PBX动态损伤影响的近场动力学模拟[J]. 含能材料, 2023, 31(2):160-169.
	HUANG Y F, DENG X L, BAI J S. Dynamic damage response of PBX with different coating structures via peridynamic simulation[J]. Chinese Journal of Energetic Materials, 2023, 31(2):160-169. (in Chinese)
[22]	SAFAR-NADERI M-H, SHAKOURI M, GHASEMI-GHALEB-AHMAN A. A bond-based peridynamics model based on variable material properties for modeling elastoplastic behavior[J]. Materials Today Communications, 2023,35:105890.
[23]	DIMOLA N, COCLITE A, FANIZZA G, et al. Bond-based peridynamics,a survey prospecting nonlocal theories of fluid-dynamics[J]. Advances in Continuous and Discrete Models, 2022,2022:60.
[24]	SUN M W, LIU L S, MEI H, et al. A bond-based peridynamic model with matrix plasticity for impact damage analysis of composite materials[J]. Materials, 2023,16:2884.
[25]	胡少青. NEPE推进剂的粘—超弹本构模型及其应用研究[D]. 南京: 南京理工大学, 2015.
	HU S Q. A visco-hyperelastic constitutive model for NEPE propellant and its application[D]. Nanjing: Nanjing University of Science and Technology, 2015. (in Chinese)
[26]	HOU X M, FAN L, YU C G, et al. Crack propagation analysis of damaged solid propellant under impact overload[J]. Journal of Physics:Conference Series, 2021,2125:012061.
[27]	MARTINEZ M, LOPEZ R, RODRIGUEZ J, et al. Evaluation of the structural integrity of solid rocket propellant by means of the viscoelastic fracture mechanics approach at low and medium strain rates[J]. Theoretical and Applied Fracture Mechanics, 2022,118:103237.
[28]	GROSS D, SEELIG T. Fracture mechanics:with an introduction to micromechanics[M]. Berlin,Heidelberg, Germany:Springer, 2006.
[29]	刘瀚文, 吕玺, 付小龙, 等. 固体推进剂断裂与裂纹扩展研究进展[J]. 火炸药学报, 2024, 47(10):857-869.
	LIU H W, LÜ X, FU X L, et al. Progress of Study on the fracture and crack propagation of solid propellant[J]. Chinese Journal of Explosives & Propellants, 2024, 47(10):857-869 (in Chinese).
[30]	李晔鑫, 韩波, 李记威. 含裂纹HTPB推进剂断裂准则研究[J]. 航空兵器, 2014(6):32-35,44.
	LI Y X, HAN B, LI J W. Study of fracture criterion for HTPB propellant with crack[J]. Aero Weaaponry, 2014(6):32-35,44. (in Chinese)
[31]	李东. 固体推进剂药柱表面裂纹动态力学特性研究[D]. 南京: 南京理工大学, 2008.
	LI D. Dynamic mechanics characteristic study of surface cracks in solid propellant grain[D]. Nanjing: Nanjing University of Science and Technology, 2008. (in Chinese)
[32]	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.
	LONG B, CHANG X L, FANG P Y, et al. Prediction of the tensile strength of solid propellant specimen with crack[J]. Chinese Journal of Explosives & Propellants, 2014, 37(2):65-68. (in Chinese)
[33]	LIU C T, LABORATORY P. Crack growth behavior in a solid propellant[J]. Engineering Fracture Mechanics, 1997,56:127-135.