烟台大学学报（自然科学与工程版）Issue(4)：277-288,12.DOI:10.13951/j.cnki.371213/n.2015.04.009
采用数值分析的压痕法识别陶瓷材料断裂韧性的精度问题研究
Study on Accuracy Problem of Indentation Method Based on the Numerical Analysis to Evaluating the Fracture Toughness of Ceramic Materials
摘要
Abstract
By using the virtual crack closure technique, the accuracy problem of indentation method, which is based on the numerical analysis to evaluating the fracture toughness of ceramic materials, is studied. The accuracy of three typical formulas established by numerical analysis are analyzed and compared. The results show that, for Tang and Lee formulas, the errors between measured and theoretical values increase with We/Wt increasing, and the maximum errors are 193. 39% and 81. 99%, respectively. The maximum errors of the Hyun formula are all within 30. 65% except the material with E=70 GPa and We/Wt =0. 7( errors up to -75. 59%). Compared with Tang and Lee formulas, Hyun formula has obviously higher test accuracy. This work provides a theoretical basis for reasonably using indentation method to obtain the values of ceramic materials' fracture toughness, and lays a founda-tion for establishing a new testing method with high accuracy and wide range of application.关键词
数值分析/压痕法/陶瓷材料/断裂韧性/比功Key words
numerical analysis/indentation method/ceramic materials/fracture toughness/the ratio of unloading work to total loading work分类
化学化工引用本文复制引用
王家梁,马德军,孙亮,肖富君..采用数值分析的压痕法识别陶瓷材料断裂韧性的精度问题研究[J].烟台大学学报（自然科学与工程版）,2015,(4):277-288,12.基金项目
军队科研计划项目(2014CJ011) （2014CJ011）
