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中文摘要：
为了更合理地描述陶瓷材料的拉伸型损伤，以材料存在初始缺陷的事实为基础，将舍有众多不规则的微裂纹（或孔洞）的实际损伤体近似为一种“等效微孔洞体系”，提出了一种陶瓷材料的有核长大拉伸型损伤演化方程；通过数值计算模拟陶瓷在平板撞击层裂实验时的自由面速度一时程曲线，优选得出了其拉伸损伤参数。差分计算结果与实验结果吻合较好，且优于商业软件Ls—dyna证实了该文提出的陶瓷材料拉伸型损伤演化方程是合理的和实用的。
英文摘要：
In order to describe the tensile damage of ceramic material more reasonably, dama body containing a number of irregular micro-cracks was approximated by ＂equivalent micro-vc system＂ based on the idea of the initial defects in materials. A nucleated growth tensile-damage-volution equation of ceramics was presented. Free surface velocity-time curve in the plate impact experiments of spallation was numerically simulated, and the tensile damage parameters we obtained selectively. The results calculated by difference method that is better than commerc software Ls-dyna are in good agreement with experimental data. The proposed tensile-dama equation of ceramic materials is reasonable and practical.
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