一种陶瓷材料断裂韧性压痕法计算公式

A New Formula for Calculating Fracture Toughness of Ceramics by Indentation

针对传统压痕断裂解析公式普遍存在测试精度较低、材料适用范围小的问题,基于陶瓷材料断裂韧性的维氏压入仿真分析结果,提出了一种新的陶瓷材料断裂韧性计算公式。对四种典型陶瓷材料试样的维氏压入实验结果表明,新公式的断裂韧性整体计算精度在±13.5%以内,与传统断裂韧性解析公式相比,在保持相当计算精度的同时,适用材料范围更加广泛。

Traditional analytical formulas for indentation fracture toughness of ceramics are commonly troubled with low accura cy and narrow application range.Hence,a modified formula for indentation fracture toughness is proposed based on the simula tion data of Vickers indentation on ceramic materials.Results of Vickers indentation tests on four representative ceramic samples indicated that,the proposed formula could apply to broader range of ceramic materials with an acceptable accuracy (within ±13.5%) than traditional analytic fracture toughness formulas.