Limit of crack depth in KIC testing for a clay

作者：Wang, Jun-Jie^*; Huang, Shi-Yuan; Hu, Jun-Feng

来源：Engineering Fracture Mechanics, 2016, 164: 19-23.

DOI：10.1016/j.engfracmech.2016.08.006

• Fracture toughness
• Limit of crack depth
• Three-point bending test
• Single edge cracked beam
• Clay

Fracture toughness (K-IC) is a very important parameter to evaluate fracture behavior of materials. Three-point bedding (TPB) test on a single edge cracked beam (SECB) is often used to determine the value of K-IC of soils. Depth of initial crack (a) of the SECB specimen may affect the tested value of K-IC, limit of crack depth is therefore necessary in order to obtain the value of K-IC. In this study, a red clay, distributed widely in south-west of China, was used to investigate the limit. Three-group TPB tests on 63 SECB specimens with different dimensions and properties were carried out. Based on the testing results, the limit of crack depth for the clay, i.e. the ratio of initial crack depth to specimen width a/W = 0.3-0.6, was suggested.

• 出版日期2016-9
• 单位重庆交通大学