Effect of Sample Shape and Size on the Thermal Shock Resistance for Ultra-High Temperature Ceramics
The ceramic thermal shock resistance is usually determined by a stnp or a disk sample. However,sample shape and size have greatly effect on determining the strength of Ultra-high temperature ceramics (UHTCs). Study on the thermal shock resistance of UHTCs with different shape and size is very important. Combining mechanics with oxidation dynamic theory,the present work studied the mechanical behavior of UHTCs under high temperature condition,which is different from the traditional thermal shock theory. The parameters,such as thermal expansion coefficient and Youngs modulus. are considered as a function of temperature and incorporated into ANSYS code to calculate the stress field of UHTCs under high temperature condition. The effects of sample shape and size on UHTCs stress are discussed. It is found that the thermal shock resistance ofUHTCs is strongly affected by the sample shape and size and this is useful for the characterization of UHTCs on mechanical propernes.
UHTCs Thermal shock resistance Equivalence stress
Tao Zeng Shi Yan Yu Gu Lili Jiang Daining Fang Yu Gao
Department of Engineering Mechanics,Harbin University of Science and Technology,Harbin 150080,P.R.Ch Department of Mechanics and Aerospace Technology,Peking University,Beijing 100871,China
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
223-225
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）