多管火箭武器箱式复合材料定向器长期堆码贮存吸湿-蠕变耦合行为预测

doi:10.3969/j.issn.1000-1093.2021.03.005

摘要/Abstract

摘要： 为研究多管火箭武器箱式复合材料定向器长期堆码贮存吸湿-蠕变耦合行为，在Schapery非线性模型中引入湿移位因子，推导考虑吸湿效应的三维正交各向异性非线性蠕变本构模型。制备E-玻璃纤维/6509环氧树脂复合材料层压板，开展吸湿试验、静态力学性能试验和短期蠕变-回复试验，获得复合材料吸湿特性参数和吸湿率、应力相关非线性蠕变参数。采用有限元方法建立湿扩散-非线性蠕变耦合数值分析模型，预测箱式复合材料定向器贮存15 a后的蠕变变形。结果表明：在一般条件军用仓库中，贮存1 a时间后水分扩散到定向器内表面，贮存8 a后定向器基本达到饱和吸湿状态；所有20根定向器的最大残余变形位置都位于第2、3定位安装环之间，并且在三维空间内近似呈马鞍状分布；上下两行中间位置定向器的残余变形最大，最大值为0.38 mm；左右两列中间位置定向器的残余变形最小，最小值为0.33 mm.

关键词: 多管火箭武器, 复合材料定向器, 堆码贮存, 非线性黏弹性, 吸湿-蠕变耦合

Abstract: In order to investigate the moisture absorption-creep coupling behavior during long-term stacking storage of box-type composite directors for multiple launch rocket systems, a three-dimensional orthotropic nonlinear creep constitutive model considering moisture effect is derived by introducing the moisture shift factor into the Schapery's nonlinear equation. The E-fiberglass/6509 epoxy resin composite laminates were prepared, and the moisture absorption test, static mechanical performance test and short-term creep-recovery test were carried out to obtain the hygroscopic parameters and the moisture- and stress-dependent nonlinear creep parameters. Finite element method was used to establish a numerical model of coupled moisture diffusion-nonlinear creep analysis. The creep deformation of composite directors after 15 years of storage was predicted. The calculated results show that the moisture diffuses to the inner surface of director after one year of storage in the general military warehouse and reaches the quasi-equilibrium uptake state after eight years. The maximum residual deformations of all 20 directors take place between the second and third positioning rings, and are approximately distributed in a saddle shape in three-dimensional space. The residual deformations of the directors between upper and lower rows are the largest with a maximum value of 0.38 mm, while those of the directors between left and right columns are the smallest with a minimum value of 0.33 mm.

Key words: multiplelaunchrocketsystem, compositedirector, stackingstorage, nonlinearviscoelasticity, moistureabsorption-creepcoupling

中图分类号:

孙同生，朱隽垚，于存贵，杨文超，徐强. 多管火箭武器箱式复合材料定向器长期堆码贮存吸湿-蠕变耦合行为预测[J]. 兵工学报, 2021, 42(3): 487-498.

SUN Tongsheng, ZHU Junyao, YU Cungui, YANG Wenchao, XU Qiang. Prediction of Moisture Absorption-creep Coupling Behavior of Box-type Composite Directors for Multiple Launch Rocket System under Long-term Stacking Storage[J]. Acta Armamentarii, 2021, 42(3): 487-498.

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