Wenchang Zhang
Research Subjects
Wenchang Zhang has a total of 5 co-authors. Here are the top co-authors by number of shared publications:
- Hao Zeng
Research Institute of Petroleum Engineering Technology, Zhongyuan Oilfield Branch of Sinopec, Puyang 457000, China
1 shared publication - Hongjian Wang
College of Geosciences and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
1 shared publication - Jian Li
Research Institute of Petroleum Engineering Technology, Zhongyuan Oilfield Branch of Sinopec, Puyang 457000, China
1 shared publication - Zhendong Cui
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
1 shared publication - Zijiang Zhao
China Railway Bridge Engineering Bureau Group Co., Ltd., Tianjin 300300, China
1 shared publication
Latest Publications
- Open Access
- 18 January 2023
- Published by MDPI AG in Sustainability
- Vol. 15 (3) , 1863
An Experimental Study on the Determination of Shale KIC by Semi-Disk Three-Point Bending
In order to accurately test the KIC of the vertical stratification direction of shale, a semi-circular bending specimen with a linear chevron notch ligament (LCNSCB) was designed. The minimum dimensionless stress intensity factor (Y*min) of the LCNSCB specimen was calculated by the finite element method and the slice synthesis method, respectively. Two sets of prefabricated samples of the LCNSCB specimen under arrester and divider mode were used to conduct three-point bending loading experiments. The dispersion of the measured KIC value of the specimens was analyzed by standard deviation and coefficient of variation, and the reason that the KIC dispersion of specimens in divider mode was larger than in arrester mode was discussed. Compared with the experimental data of the existing literature, the data of this experiment shows that the LCNSCB specimen can avoid the disadvantage of lower measured KIC values due to a larger fracture processing zone featured in the CSTSCB and CCNBD specimens, combined with the merits of a shorter fracture processing zone of the SR or CR specimens, and the render measured the KIC value to be closer to the material’s true fracture toughness value. The narrow ligament of the LCNSCB specimen has a favorable crack propagation guiding effect, can generate consistent KIC values, and could be used to accurately test the fracture toughness of rock material in vertical bedding direction.
- 18 January 2023
- Published by MDPI AG in Sustainability
- Vol. 15 (3) , 1863
Open AccessAn Experimental Study on the Determination of Shale KIC by Semi-Disk Three-Point Bending
In order to accurately test the KIC of the vertical stratification direction of shale, a semi-circular bending specimen with a linear chevron notch ligament (LCNSCB) was designed. The minimum dimensionless stress intensity factor (Y*min) of the LCNSCB specimen was calculated by the finite element method and the slice synthesis method, respectively. Two sets of prefabricated samples of the LCNSCB specimen under arrester and divider mode were used to conduct three-point bending loading experiments. The dispersion of the measured KIC value of the specimens was analyzed by standard deviation and coefficient of variation, and the reason that the KIC dispersion of specimens in divider mode was larger than in arrester mode was discussed. Compared with the experimental data of the existing literature, the data of this experiment shows that the LCNSCB specimen can avoid the disadvantage of lower measured KIC values due to a larger fracture processing zone featured in the CSTSCB and CCNBD specimens, combined with the merits of a shorter fracture processing zone of the SR or CR specimens, and the render measured the KIC value to be closer to the material’s true fracture toughness value. The narrow ligament of the LCNSCB specimen has a favorable crack propagation guiding effect, can generate consistent KIC values, and could be used to accurately test the fracture toughness of rock material in vertical bedding direction.