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强冲击载荷下氧化铝陶瓷的力学特性及本构模型
引用本文:任会兰,宁建国.强冲击载荷下氧化铝陶瓷的力学特性及本构模型[J].北京理工大学学报,2007,27(9):761-764.
作者姓名:任会兰  宁建国
作者单位:北京理工大学,爆炸科学与技术国家重点实验室,北京,100081
摘    要:研究氧化铝陶瓷在强冲击加载下的力学响应和动态本构模型. 利用一级轻气炮对陶瓷靶板进行冲击加载,测量得到靶板内的应力-时间曲线,并分析得到氧化铝陶瓷的动力学特性. 结合陶瓷材料破坏特性分析,从脆性材料内翼型裂纹的产生和扩展机理出发,建立了微裂纹损伤本构模型,其中损伤参数通过微裂纹尺寸和微裂纹数2个变量进行描述. 实验与计算结果表明,该模型较好地描述了强冲击载荷下氧化铝陶瓷的力学行为.

关 键 词:力学响应  破坏特性  本构模型  强冲击载荷  氧化铝陶瓷  力学特性  本构模型  Shock  Loading  Alumina  Ceramic  Constitutive  Model  Characteristics  力学行为  结果  计算  实验  描述  变量  微裂纹尺寸  损伤参数  微裂纹损伤  扩展机理  翼型  脆性材料
文章编号:1001-0645(2007)09-0761-05
收稿时间:2007/4/26 0:00:00
修稿时间:2007-04-26

Mechanical Characteristics and Constitutive Model of Alumina Ceramic Subjected to Shock Loading
REN Hui-lan and NING Jian-guo.Mechanical Characteristics and Constitutive Model of Alumina Ceramic Subjected to Shock Loading[J].Journal of Beijing Institute of Technology(Natural Science Edition),2007,27(9):761-764.
Authors:REN Hui-lan and NING Jian-guo
Institution:State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
Abstract:Mechanical response and constitutive model of alumina under shock loading are discussed.Applying plate impact,stress-time curves of ceramic target were measured and dynamic mechanical behaviors were analyzed.Micro-cracks damage constitutive model was developed based on wing crack nucleation and growth,in which the damage parameter was described by the size and numbers of micro-cracks.Results of the model were compared to the experimental results and a good correlation is obtained.
Keywords:mechanical response  failure characteristics  constitutive model
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