Mechanical Behavior of a Branch Pipe Subjected to Out-of-Plane Bending Load

2001 ◽  
Vol 124 (1) ◽  
pp. 7-13 ◽  
Author(s):  
S. Chapuliot ◽  
D. Moulin ◽  
D. Plancq
Keyword(s):  
Experimental Study ◽  
Internal Pressure ◽  
Limit State ◽  
Branch Pipe ◽  
Plastic Behavior ◽  
Bending Load ◽  
Finite Element Calculations ◽  
Out Of Plane ◽  
Plane Bending ◽  
Parameter Influence

A numerical and experimental study on the behavior of a branch pipe is presented in this article. The test is the first one of a series analyzing the behavior of the branch pipe under out-of-plane bending load in the presence of a crack near the junction, a weld or internal pressure. It is performed under bending alone, without weld and without internal pressure, so as to constitute a reference for the series, and thus to estimate each parameter influence. In complement to the experimental study, finite element calculations are performed and presented in this article, so as to analyze the elastic-plastic behavior of the branch pipe and its limit state.

Stress and flexibility factors for multi-mitred pipe bends subjected to internal pressure combined with external loadings

1972 ◽  
Vol 7 (2) ◽  
pp. 97-108 ◽  
Author(s):  
M P Bond ◽  
R Kitching
Keyword(s):  
Internal Pressure ◽  
Large Diameter ◽  
Pipe Bend ◽  
Bending Tests ◽  
Bending Load ◽  
Out Of Plane ◽  
Thin Walled ◽  
Plane Bending ◽  
Internal Pressures ◽  
Stress Patterns

The stress analysis of a multi-mitred pipe bend when subjected to an internal pressure and a simultaneous in-plane or out-of-plane bending load has been developed. Stress patterns and flexibility factors calculated by this analysis are compared with experimental results from a large-diameter, thin-walled, three-weld, 90° multi-mitred bend which was subjected to in-plane bending tests at various internal pressures.

Experimental study of fire effects on out-of-plane bending strength/flexibility of steel tubular T-joints

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 2174-2188
Author(s):  
F. Ahmadpour ◽  
M. Zeinoddini ◽  
M. Mo'tamedi ◽  
R. Rashnooie
Keyword(s):  
Experimental Study ◽  
Bending Strength ◽  
Fire Effects ◽  
T Joints ◽  
Out Of Plane ◽  
Plane Bending

Failure of GRP Pipe Bends Under Out-of-Plane Flexure with and Without Pressure

1993 ◽  
Vol 207 (2) ◽  
pp. 133-141
Author(s):  
R Kitching ◽  
P Myler
Keyword(s):  
Internal Pressure ◽  
Polyester Resin ◽  
Design Procedure ◽  
Out Of Plane ◽  
Failure Loads ◽  
Smooth Pipe ◽  
Plane Bending ◽  
Chopped Strand Mat ◽  
Plane Flexure

Tests to failure have been carried out on six smooth pipe bends constructed by hand lay-up from polyester resin and glass in the form of chopped strand mat. The failure loads under out-of-plane bending only are compared with those where this type of loading is combined with internal pressure. The results are discussed in relation to the design procedure adopted in BS 7159: 1989.

Plastic Collapse Assessment Procedure in P-M Diagram Method for Pipe Bends With a Local Thin Area Under Combined Pressure and Out-of-Plane Bending Moment

2012 ◽  
Author(s):  
Kenji Oyamada ◽  
Shinji Konosu ◽  
Takashi Ohno
Keyword(s):  
Internal Pressure ◽  
Pressure Ratio ◽  
Bending Moment ◽  
Piping System ◽  
Assessment Procedure ◽  
Plastic Collapse ◽  
Diagram Method ◽  
Out Of Plane ◽  
Plane Bending ◽  
Collapse Assessment

Pipe bends are common elements in piping system such as power or process piping, and local thinning are typically occurred on pipe bends due to erosion or corrosion. Therefore, it is important to establish the plastic collapse condition for pipe bends having a local thin area (LTA) under combined internal pressure and external bending moment. In this paper, a simplified plastic collapse assessment procedure in p-M (internal pressure ratio and external bending moment ratio) diagram method for pipe bends with a local thin area simultaneously subjected to internal pressure, p, and external out-of-plane bending moment, M, due to earthquake, etc., is proposed, which is derived from the reference stress. In this paper, only cases of that an LTA is located in the crown of pipe bends are considered. The plastic collapse loads derived from the p-M diagram method are compared with the results of both experiments and FEA for pipe bends of the same size with various configurations of an LTA.

Theory of thin elastic shells applied to pipe bends subjected to bending and internal pressure

1972 ◽  
Vol 7 (4) ◽  
pp. 285-293 ◽  
Author(s):  
J A Blomfield ◽  
C E Turner
Keyword(s):  
Internal Pressure ◽  
Shell Theory ◽  
Coupling Effect ◽  
Governing Equations ◽  
Elastic Shells ◽  
Out Of Plane ◽  
Plane Bending

A consistent set of equations for the in-plane and out-of-plane bending of pipe bends is derived from the equations of shell theory with a correction for the coupling effect of internal pressure. The resulting governing equations are solved numerically and compared with other experimental and theoretical solutions.

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