A model for arrest of rapid cracks in gas-pressurized ductile steel line pipe

被引：5
|
作者：
Simha, C. Hari Manoj [1 ]
机构：
[1] Nat Resources Canada, CanmetMAT, 183 Longwood Rd South, Hamilton, ON L8P 0A5, Canada
来源：
ENGINEERING FRACTURE MECHANICS | 2016年 / 154卷
关键词：
Pipeline; Fast fracture; Battelle Two-Curve Model; CTOA; Crack arrest; Buried pipe; FRACTURE; ENERGY;
D O I：
10.1016/j.engfracmech.2015.12.009
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Modifying and adding to elements of Schindler's model, a model to predict arrest of rapidly propagating cracks in gas-pressurized steel pipe is presented. A bulging factor models the flaring of the crack flaps and contributes to the crack driving force. The crack tip, a structural hinge in each flap, a traveling neck ahead of the crack tip, and soil backfill contribute to the plastic dissipation rate. Model inputs are yield and ultimate strength, hardening exponent, crack-tip opening angle, soil density and Charpy V-Notch energy. Model predictions for steel grades ranging from X52 to X120, display modest non-conservatism. Crown Copyright (C) 2016 Published by Elsevier Ltd. All rights reserved.
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页码：245 / 261
页数：17
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