The effect of curvature of a pipe wall on the fracture toughness and protection of high pressure pipelines

被引：0

作者：

Gajdos, L'ubomir ^{[1
]}

Sperl, Martin ^{[1
]}

Crha, Petr ^{[2
]}

机构：

[1] AS CR, Inst Theoret & Appl Mech, Prosecka 76, Prague 19000 9, Czech Republic

[2] CEPS AS, Belnicka 628, Jesenice U Prahy 25242, Czech Republic

来源：

MATERIALS TODAY-PROCEEDINGS | 2016年 / 3卷 / 04期

关键词：

Fracture toughness; straightening; curved CT specimens;

D O I：

10.1016/j.matpr.2016.03.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For standard fracture mechanical tests flat specimens (principally CT or SENB) are required. When investigating fracture mechanical properties of thin - walled pipes this brings about a problem because it is necessary to straighten pipe bands. This operation causes internal stresses to be induced not only in the semi-product subjected to straightening but also in finished specimens. A question therefore arises to what extent are then the magnitudes of the fracture toughness determined representative for the actual cylindrical wall. To solve this problem fracture mechanics tests were carried out on flat (straightened) CT specimens as well as on curved CT specimens with the natural curvature. The R - curves as well as the resulting parameters of the fracture toughness, obtained for both types of CT specimens, were compared and it was concluded that the fracture toughness of the pipe material determined on straightened CT specimens was practically the same as that obtained on curved CT specimens. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：973 / 978

页数：6