摘要
蓝宝石单晶因具有优异的力学性能和光学透明性,在武器装备防护视窗中具有广泛应用前景。为系统研究其动态力学行为,本文开展了多种测试与数值仿真。通过准静态和动态压缩试验,获取材料的应力-应变关系,分析强度对应变率的敏感性;采用巴西圆盘劈裂试验测得抗拉强度;借助三轴围压试验方法,研究了颗粒状蓝宝石单晶在高静水压力下的力学响应。基于上述试验数据,构建了包含状态方程、强度准则和损伤演化的材料本构模型。进一步开展了弹丸高速撞击试验,并基于FEM-SPH耦合方法建立数值模型,对侵彻过程与裂纹扩展机理进行了模拟。结果表明,该本构模型可有效预测蓝宝石单晶在多种应力状态下的力学响应,对防护结构设计具有重要意义。
Sapphire single crystals are widely used in protective windows for military equipment due to their excellent mechanical strength and optical transparency.To systematically investigate their dynamic mechanical behavior,a series of experiments and numerical simulations were conducted in this study.Quasi-static and dynamic compression tests were carried out to obtain the stress-strain response and to analyze strength to strain rate sensitivity.The Brazilian disk splitting test was performed to measure the tensile strength,and a triaxial confining pressure test was conducted to study the mechanical response of granular sapphire single crystals under high hydrostatic pressure.Based on the above experimental data,a material constitutive model was conducted,incorporating an equation of state,a strength criterion,and a damage evolution law.Ballistic high speed impact tests were further conducted,and a FEM-SPH coupling method numerical model was established to simulate the penetration process and crack propagation mechanisms.The results show that the constitutive model accurately captures the mechanical response of sapphire single crystals under various stress conditions,providing important guidance for the design of protective structures.
作者
黄友奇
史刘彤
高玉波
周林
HUANG Youqi;SHI Liutong;GAO Yubo;ZHOU Lin(China Building Materials Academy Co.,Ltd.,Beijing 100024,China;School of Aerospace Engineering,North University of China,Taiyuan 030051,China)
出处
《硅酸盐通报》
2025年第9期3391-3401,3410,共12页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(12172337)
山西省基础研究计划(20210302123022)。
关键词
蓝宝石单晶
力学性能
本构关系
侵彻
数值仿真
损伤
sapphire single crystal
mechanical property
constitutive modeling
penetration
numerical simulation
damage
作者简介
黄友奇(1983-),男,高级工程师。主要从事视窗屏蔽/隐身/防弹/电加热等功能玻璃的研究。E-mail:nanostar2008@163.com;通信作者:高玉波,博士,副教授。E-mail:gaoyb@nuc.edu.cn.
