Determination of the Fracture Toughness of Glasses via Scratch Tests with a Vickers Indenter  

作　　者：Haitao Liu Jianwei Zhang Minghao Zhao Chunsheng Lu 

机构地区：[1]lSchool of Mechanics and Safety Engineering,Zhengzhou University,Zhengzhou 450001,China [2]School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China [3]Henan Key Engineering Laboratory for Anti-fatigue Manufacturing Technology,Zhengzhou 450001,China [4]School of Civil and Mechanical Engineering,Curtin University,Perth 6845,Western Australia,Australia

出　　处：《Acta Mechanica Solida Sinica》2022年第1期129-138,共10页固体力学学报（英文版）

基　　金：the financial support from National Natural Science Foundation of China(Nos.12072324 and U1804254);Natural Science Foundation of Henan Province for Excellent Young Scholars(212300410087).

摘　　要：Fracture toughness is an important index in safety evaluation for materials and structures.Its convenient and accurate characterization has attracted extensive attention.For small specimens,traditional testing methods of fracture toughness are not suitable due to limitations in sample size and shape.In this work,a new formula is proposed to determine the fracture toughness of glasses using scratch tests with a Vickers indenter based on dimensional analysis and finite element analysis.Fracture toughness of glasses could be calculated with elastic modulus,crack depth of scratched materials and normal force applied during the scratch tests.The effects of plastic deformation and interfacial friction between the Vickers indenter and scratched materials are considered,and the crack shape is consistent with experimental observations.The proposed formula is verified by comparing the fracture toughness of soda-lime and borosilicate glasses obtained from scratch tests with those obtained via indentation tests.This work provides an alternative method to determine the fracture toughness of glass materials.

关 键 词：Scratch test Fracture toughness GLASS Dimensional analysis Finite element analysis 

分 类 号：O34[理学—固体力学]