学术
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.[著者文摘]
文章出处:
《北京理工大学学报》-2007年27卷9期,796 -761-764,796页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1001-0645（2007）09-0761-05
Mechanical Characteristics and Constitutive Model of Alumina Ceramic Subjected to Shock Loading
REN Hui-lan, NING Jian-guo （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.[著者文摘]
Key words:
mechanical response; failure characteristics; constitutive model
基金资助:
基金项目：国家自然科学基金资助项目（10625208,10632080）
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