Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture
Apstrakt
The subject of this study was the application of local approach to ductile fracture in order to estimate the integrity of damaged seam casing pipes for oil and gas drilling rigs. The experimental testing included tensile testing of specimens and a pressure test of a pipe with different levels of damage simulated by machined notches. In exploitation, such structures (i.e., pipes with local thin areas) can fail by the ductile fracture mechanism or by plastic collapse in the ligament. However, the majority of the procedures for determining their integrity are based on limit loads, i.e., plastic collapse criteria. In this work, a pipe subjected to internal pressure was modelled using the finite element method and local approach to fracture (the Complete Gurson Model - CGM), with the aim of determining damage development in the material (i.e., at the bottom of a machined defect) and of establishing the criteria for the maximum pressure that a damaged pipe can withstand. The results obtained... using the micromechanical model are discussed and compared with several often used limit load expressions from the literature and a stress-based finite element criterion. It is shown that local approach can give appropriate results and represent failure criterion for pipes with local thin areas. [doi:10.2320/matertrans.M2011210]
Ključne reči:
casing pipe / simulated corrosion defect / local approach / finite element method / maximum pressureIzvor:
Materials Transactions, 2012, 53, 1, 185-190Izdavač:
- Japan Inst Metals, Sendai
Finansiranje / projekti:
- Mikromehanički kriterijumi oštećenja i loma (RS-MESTD-Basic Research (BR or ON)-174004)
- Razvoj novih metodologija revitalizacije turbinske i hidromehaničke opreme hidroelektrana u zavisnosti od uzroka degradacije materijala (RS-MESTD-Technological Development (TD or TR)-35002)
- EUREKA E!5348
DOI: 10.2320/matertrans.M2011210
ISSN: 1345-9678
WoS: 000301163000029
Scopus: 2-s2.0-84858300390
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Međo, Bojan AU - Rakin, Marko AU - Arsić, Miodrag AU - Šarkočević, Živče AU - Zrilić, Milorad AU - Putić, Slaviša PY - 2012 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2191 AB - The subject of this study was the application of local approach to ductile fracture in order to estimate the integrity of damaged seam casing pipes for oil and gas drilling rigs. The experimental testing included tensile testing of specimens and a pressure test of a pipe with different levels of damage simulated by machined notches. In exploitation, such structures (i.e., pipes with local thin areas) can fail by the ductile fracture mechanism or by plastic collapse in the ligament. However, the majority of the procedures for determining their integrity are based on limit loads, i.e., plastic collapse criteria. In this work, a pipe subjected to internal pressure was modelled using the finite element method and local approach to fracture (the Complete Gurson Model - CGM), with the aim of determining damage development in the material (i.e., at the bottom of a machined defect) and of establishing the criteria for the maximum pressure that a damaged pipe can withstand. The results obtained using the micromechanical model are discussed and compared with several often used limit load expressions from the literature and a stress-based finite element criterion. It is shown that local approach can give appropriate results and represent failure criterion for pipes with local thin areas. [doi:10.2320/matertrans.M2011210] PB - Japan Inst Metals, Sendai T2 - Materials Transactions T1 - Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture EP - 190 IS - 1 SP - 185 VL - 53 DO - 10.2320/matertrans.M2011210 ER -
@article{ author = "Međo, Bojan and Rakin, Marko and Arsić, Miodrag and Šarkočević, Živče and Zrilić, Milorad and Putić, Slaviša", year = "2012", abstract = "The subject of this study was the application of local approach to ductile fracture in order to estimate the integrity of damaged seam casing pipes for oil and gas drilling rigs. The experimental testing included tensile testing of specimens and a pressure test of a pipe with different levels of damage simulated by machined notches. In exploitation, such structures (i.e., pipes with local thin areas) can fail by the ductile fracture mechanism or by plastic collapse in the ligament. However, the majority of the procedures for determining their integrity are based on limit loads, i.e., plastic collapse criteria. In this work, a pipe subjected to internal pressure was modelled using the finite element method and local approach to fracture (the Complete Gurson Model - CGM), with the aim of determining damage development in the material (i.e., at the bottom of a machined defect) and of establishing the criteria for the maximum pressure that a damaged pipe can withstand. The results obtained using the micromechanical model are discussed and compared with several often used limit load expressions from the literature and a stress-based finite element criterion. It is shown that local approach can give appropriate results and represent failure criterion for pipes with local thin areas. [doi:10.2320/matertrans.M2011210]", publisher = "Japan Inst Metals, Sendai", journal = "Materials Transactions", title = "Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture", pages = "190-185", number = "1", volume = "53", doi = "10.2320/matertrans.M2011210" }
Međo, B., Rakin, M., Arsić, M., Šarkočević, Ž., Zrilić, M.,& Putić, S.. (2012). Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture. in Materials Transactions Japan Inst Metals, Sendai., 53(1), 185-190. https://doi.org/10.2320/matertrans.M2011210
Međo B, Rakin M, Arsić M, Šarkočević Ž, Zrilić M, Putić S. Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture. in Materials Transactions. 2012;53(1):185-190. doi:10.2320/matertrans.M2011210 .
Međo, Bojan, Rakin, Marko, Arsić, Miodrag, Šarkočević, Živče, Zrilić, Milorad, Putić, Slaviša, "Determination of the Load Carrying Capacity of Damaged Pipes Using Local Approach to Fracture" in Materials Transactions, 53, no. 1 (2012):185-190, https://doi.org/10.2320/matertrans.M2011210 . .