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.

1.
Lin, J., et al. 1993, “Local Stress Factors for Pipe Nozzle due to Radial Load, Circumferential and Longitudinal Moment,” ASME PVP - Vol. 265, pp. 307–318.
2.
Moffat, D. G., et al., 1989, “Moment Loads on Branch Pipe Junctions: The Effect of Run Pipe Fixing on Elastic Stress Level and Its-Application on Plastic Limit Loads,” Int. J. Pressure Vessels Piping, pp. 249–259.
3.
Gwalthey, R. C., 1976, “Experimental Stress Analysis of Cylinder-to-Cylinder Shell Models and Comparisons With Theoretical Predictions,” ASME J. Pressure Vessel Technol., Nov., pp. 283–290.
4.
Moffat
,
D. G.
, et al.
,
1991
, “
Effective Stress Factors for Piping Branch Junctions due to Internal Pressure and External Moment Loads
,”
J. Strain Anal.
,
26
, pp.
85
101
.
5.
Ellyin, F., and Turkkan, N., 1973, “Out-of-Plane Limit Couples Nozzles in Cylindrical Vessels of Branch Pipes in Tee Connections,” Proc., 2nd Int. Conf. on Pressure Vessels Technology, Paper 126, San Antonio, TX, Sept.
6.
Schroeder, J., 1973, “Upper Bounds to In Plane and Out-of-Plane Limit Couples Applied to Branch for Branch/Pipe Diameter Ratios Smaller Than 0.8,” Proc., 2nd Int. Conf. on Pressure Vessels Technology, Papers 122-123, San Antonio, TX, Sept.
7.
Hamilton
,
R.
, et al.
,
1996
, “
Simplified Lower Bound Limit Analysis of Pressurized Cylinder/Cylinder Intersections Using Generalized Yield Criteria
,”
Int. J. Pressure Vessels Piping
,
67
, pp.
219
226
.
8.
Cloud, R. L., Rodabaugh, E. C., 1968, “Approximate Analysis of the Plastic Limit Pressures of Nozzles in Cylindrical Shells,” ASME J. Eng. Power, April, pp. 171–176.
9.
Schroeder, J., and Rangarajan, P., 1969, “Upper Bounds to Limit Pressures of Branch-Pipe Tee Connections,” First Int. Conf. on Pressure Vessel Technology, Part 1, September 29-October 2, p. 277–291.
10.
Yahiaoui, K., et al., 1992, “The Racheting Behavior of Fabricated Piping Branch Junctions Under Steady Internal Pressure and Simulated Seismic Run Pipe In Plane Bending,” Proc., Conf. on Structural integrity, 1992, pp. 111–123.
11.
Yahiaoui
,
K.
,
1993
, “
Single Frequency Seismic Loading Tests on Pressurized Branch Pipe Intersections Machined From Solid
,”
J. Strain Anal.
,
28
, pp.
197
207
.
12.
Ellyin, F., 1977, “Plastic Limit Load on Intersection Cylinder,” Int. Conf. on Struct. Mech. in Reactor Technology, G8/6, Paper San Francisco.
13.
Ellyin, F., 1977, “An Experimental Study of Elasto-Plastic Response of Branch Pipe Tee Connection Subjected to Internal Pressure, External Couples and Combined Loadings,” Weld. Res. Counc. Bull., 230, Sept.
14.
Schroeder
,
J.
, and
Tugcu
,
P.
,
1978
, “
Plastic Stability of Pipes and Tees Exposed to External Couples
,”
Weld. Res. Counc. Bull.
,
238
, June.
15.
Ellyin, F., and Turkkan, N., 1973, “Limit In Plane Couple of Nozzles in Cylindrical Vessels and Branch,” connections in piping systems. SMIRT, Berlin, Germany, Vol. 3, Part G.
16.
Ellyin, F., 1976, “Experimental Investigation of Limit Loads of Nozzles in Cylindrical Vessels,” Weld. Res. Counc. Bull., 219, Sept.
17.
Chapuliot, S., et al., 1997, “Mechanical Behavior of Cracked Branch Pipes Subjected to Out-of-Plane bending,” Proc., ICF9 conference, Sydney, Australia, April 1–5.
18.
Castem 2000, 1995, User’s Manual.
19.
Ponter, A. R. S., 1995, “Limit State Solutions, Based on Linear Elastic Solutions With a Spatially Varying Elastic Modulus,” Report 95-22 Universite´ de Leicester, to be published in Computer Methods in Applied Mechanics and Engineering.
20.
Desquines
,
J.
, and
Plancq
,
D.
,
1997
, “
In-Plane Limit Moment for an Elbow. Lower Bound Analytical Solution and Finite Element Processing by Elastic Compensation Method
,”
Int. J. Pressure Vessels Piping
,
71
, pp.
29
34
.
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