双基发射药黏弹特性与本构模型研究  

Viscoelastic Properties and Constitutive Model of Double-Base Propellant

作　　者：夏剑冬 徐滨[1] 廖昕[1] XIA Jian-dong;XU Bin;LIAO Xin(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学化学与化工学院,江苏南京210094

出　　处：《含能材料》2023年第11期1124-1133,共10页Chinese Journal of Energetic Materials

摘　　要：为研究双基发射药的黏弹性和力学响应特点,对双基发射药开展了黏弹特性与本构方程研究。通过拉伸、压缩、断面观察和应力松弛实验研究,明确了双基发射药的黏弹性质;然后以Reduced Polynomial(N=5)模型和Prony级数建立了双基发射药的超弹-黏弹模型,利用实验数据获取了模型参数;最后对所建立的双基发射药超弹-黏弹模型进行了验证。结果表明,双基发射药超弹本构模型对单轴拉伸应力应变的仿真结果与实验结果之间的误差不高于5.01%,超弹-黏弹本构模型对应力松弛的仿真结果与实验结果之间的误差不超过6.49%,说明建立的双基发射药超弹-黏弹本构模型能够较好地描述双基发射药的力学特性,能够为发射药力学性能研究提供重要的研究方法和仿真手段。In order to characterize the mechanical response of double-base propellant,the viscoelastic properties and constitutive model of double base propellant were studied.Firstly,the viscoelastic properties of double-base propellant were investigated by tensile,compression and stress relaxation experiments with an observation of fracture surface.Then,a hyperelastic-viscoelastic model of double base propellant was established based on the Reduced Polynomial(N=5)model and Prony series.The parame-ters of the developed model were obtained by the experimental data.Finally,the hyperelastic-viscoelastic model of double base propellant was verified.The relatively error between the results of the simulation calculated by the hyperelastic model and the ex-periment for uniaxial tensile stress-strain is less than 5.01%.The relatively error between the results of simulation and experiment for stress relaxation is less than 6.49%.The developed hyperelastic-viscoelastic constitutive model of double-base propellant can well describe the mechanical properties of double base propellant,which provides a significant method for the research of me-chanical properties of propellant.

关 键 词：发射药 黏弹性 应力松弛 本构模型 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]