SUN Liang ¹, WANG Jialiang ², SHI Xinzheng ¹
(1. Department of Vehicle Engineering, Academy of Army Armored Forces, Beijing 100072, China; 2. College of Equipment Engineering, Engineering University of Chinese Armed Police Force, Xi’an 710086, Shaanxi, China)

Abstract: Traditional analytical formulas for indentation fracture toughness of ceramics are commonly troubled with low accuracy and narrow application range. Hence, a modified formula for indentation fracture toughness is proposed based on the simulation 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.

Key words: ceramic materials; fracture toughness; indentation method