TY - JOUR
ID - 2676
TI - Investigation of External Work, Fracture Energy, and Fracture Toughness of Oil Well Cement Sheath using HCCD Test and CSTBD Test
JO - Journal of Mining and Environment
JA - JME
LA - en
SN - 2251-8592
AU - Omidi manesh, Mohammad
AU - Sarfarazi, Vahab
AU - Babanouri, Nima
AU - Rezaei, Amir
AD - Mining Engineering Department, Hamedan University of Technology, Hamedan, Iran
Y1 - 2023
PY - 2023
VL - 14
IS - 2
SP - 619
EP - 634
KW - HCCD
KW - CSTBD
KW - mode I fracture toughness
KW - cement slurry
KW - Discrete Element Method
DO - 10.22044/jme.2023.12633.2297
N2 - This work presents the hollow center cracked disc (HCCD) test and the cracked straight through Brazilian disc (CSTBD) test of oil well cement sheath using the experimental test and Particle Flow Code in two-dimensions (PFC2D) in order to determine mode I fracture toughness of cement sheath. The tensile strength of cement sheath is 1.2 MPa. The cement sheath model is calibrated by outputs of the experimental test. Secondly, the numerical HCCD model and CSTBD model with diameter of 100 mm are prepared. The notch lengths are 10 mm, 20 mm, 30 mm, and 40 mm. The tests are performed by the loading rate of 0.018 mm/s. When the notch length in CSTBD is 40 mm, the external work is decreased 48%, related to the maximum external work of model with notch length of 10 mm (0.225 KN*mm decreased to 0.116 KN*mm). When the notch length in HCCD is 30 mm, the external work is decreased 33%, related to the maximum external work of model with notch length of 10 mm (0.06 KN*mm decreased to 0.04 KN*mm). The fracture energy is largely related to the joint length. The fracture energy is decreased by increasing the notch length. In constant to the notch length, the fracture energy of the CSTBD model is more than the HCCD model. Mode I fracture toughness is constant by increasing the notch length. The HCCD test and the CSTBD test yield a similar fracture toughness due to a similar tensile stress distribution on failure surface. The experimental outputs are in accordance to the numerical results.
UR - https://jme.shahroodut.ac.ir/article_2676.html
L1 - https://jme.shahroodut.ac.ir/article_2676_1752ae8cd1f789fe732ae9159347dc4a.pdf
ER -