A specimen for studying the resistance to ductile crack propagation in pipes

Comparative study of fracture appearance in crack tip opening angle testing of gas pipeline steels

“…Similar fracture patterns were observed on the fracture surface of MDCB specimens from CTOA testing on API X80 [8,9] and X100 steel [10]. In the pioneer research work [8] on the geometry design and introducing of the MDCB specimen, the quasi-cleavage patterns in the form of chevron-marks or beach-marks, were identified on the fracture surfaces of this specimen, see Fig.…”

Fracture and damage mechanics modelling of thin-walled structures – An overview

“…In [43] the authors, following earlier attempts, use a digital camera technique for investigating relatively tough pipeline materials. In [44] moiré interferometry is used instead of light microscopy.…”

State-of-the-art review of fracture control technology for modern and vintage gas transmission pipelines

“…Recently, the focus is put on how to measure the constant critical CTOA value in the steady-state propagation of pipeline steel using different fracture specimens [64,65,[74][75][76][77]. A challenge for measuring the critical CTOA is the methodology to be used.…”