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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
  • 期刊名称：北京理工大学学报
  • 时间：0
  • 页码：761-764
  • 语言：中文
  • 分类：O347.1[理学—固体力学;理学—力学]
  • 作者机构：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081
  • 相关基金：基金项目：国家自然科学基金资助项目（10625208,10632080）
  • 相关项目：陶瓷材料的动态力学特性和抗侵彻机理研究
作者： 任会兰|宁建国|
关键词： 力学响应, 破坏特性, 本构模型, mechanical response, failure characteristics, constitutive model
中文摘要：

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.

英文摘要：

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.

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期刊论文 85 会议论文 12 获奖 4 著作 1
陶瓷材料的动态力学特性和抗侵彻机理研究
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