Steady State Techniques in Creep Force Estimation: Results From Full Scale Tests of the SOAC Vehicle on a Roller Rig

1989 ◽  
Vol 111 (1) ◽  
pp. 61-68
Author(s):  
Imtiaz-ul-Haque ◽  
E. Harry Law
Keyword(s):  
Steady State ◽  
Forced Response ◽  
Full Scale ◽  
Force Estimation ◽  
Test Procedures ◽  
Creep Force ◽  
Roller Rig ◽  
Full Scale Tests ◽  
The U.S

Steady state forced response tests of the SOAC vehicle were conducted on the roller rig (Roll Dynamics Unit) at the U.S. DOT/Transportation Test Center. This paper presents the test procedures, the results of the tests, and the analysis procedures developed for the estimation of the creep coefficients. Results of the estimates are compared with theory and possible reasons for discrepancies are discussed.

Full-Scale Tests of Cold Bend Pipes

2004 ◽  
Author(s):  
M. Sen ◽  
J. J. R. Cheng ◽  
D. W. Murray ◽  
J. Zhou ◽  
K. Adams ◽  
...  
Keyword(s):  
Compressive Strain ◽  
Local Buckling ◽  
Full Scale ◽  
Combined Loading ◽  
Experimental Program ◽  
Test Procedures ◽  
Buckling Behavior ◽  
Residual Strains ◽  
Full Scale Tests ◽  
Bend Angles

An experimental program sponsored jointly by SNAM Rete Gas, Tokyo Gas Co., Ltd. and TransCanada Pipelines Ltd. was conducted on cold bend pipes under combined loading. These tests were designed to study the local buckling behavior and to develop the critical compressive strain criteria for cold bend pipes under combined loading. The test program includes eight full-scale specimens of NPS24 and NPS30 pipes with pipe thickness up to 14.3 mm. The test parameters include different D/t ratios (44, 69, and 93), material grades (X60, X65, and X80), bend angles (1.0 to 1.5 degree/diameter), and operation pressures (0%, 40%, 60%, and 80% of SMYS). In addition to full-scale tests, initial imperfections and residual strains due to cold bend processes were also measured. This paper describes the test specimens, test setup, instrumentation, and test procedures used in the program. A brief discussion of the test results is also covered in the paper.

Behavior of wrinkled steel pipelines subjected to cyclic axial loadings

2007 ◽  
Vol 34 (5) ◽  
pp. 598-607 ◽  
Author(s):  
Sreekanta Das ◽  
J.J Roger Cheng ◽  
David W Murray
Keyword(s):  
Failure Strain ◽  
Axial Loading ◽  
Cyclic Strain ◽  
Full Scale ◽  
Axial Loads ◽  
Test Procedures ◽  
University Of Alberta ◽  
Ductile Behavior ◽  
Full Scale Tests ◽  
The University

Full-scale laboratory tests were carried out at the University of Alberta to investigate the post-wrinkling ultimate behavior of steel pipelines. The pipe specimens exhibited extreme ductile behavior and did not fail in fracture under monotonically increasing axisymmetric compressive axial loads and displacements. Fractures developed at the wrinkled region, however, when a wrinkled pipe specimen was subjected to cyclic strain reversals due to unloading and loading of primary loads. This paper presents test procedures, complete post-wrinkling behavior, fracture limit strain values, and fracture configurations obtained from full-scale tests on wrinkled pipe specimens under cyclic and monotonic axial loadings. Key words: steel pipeline, laboratory testing, cyclic axial loading, wrinkling, post-wrinkling behavior, accordion failure, strain reversals, fracture.

Investigation of planing craft maneuverability using full-scale tests

2021 ◽  
pp. 147509022110303
Author(s):  
Kazem Sadati ◽  
Hamid Zeraatgar ◽  
Aliasghar Moghaddas
Keyword(s):  
Full Scale ◽  
Performance Characteristics ◽  
Forward Speed ◽  
Speed Reduction ◽  
Planing Craft ◽  
Full Scale Tests ◽  
Turning Maneuver

Maneuverability of planing craft is a complicated hydrodynamic subject that needs more studies to comprehend its characteristics. Planing craft drivers follow a common practice for maneuver of the craft that is fundamentally different from ship’s standards. In situ full-scale tests are normally necessary to understand the maneuverability characteristics of planing craft. In this paper, a study has been conducted to illustrate maneuverability characteristics of planing craft by full-scale tests. Accelerating and turning maneuver tests are conducted on two cases at different forward speeds and rudder angles. In each test, dynamic trim, trajectory, speed, roll of the craft are recorded. The tests are performed in planing mode, semi-planing mode, and transition between planing mode to semi-planing mode to study the effects of the craft forward speed and consequently running attitude on the maneuverability. Analysis of the data reveals that the Steady Turning Diameter (STD) of the planing craft may be as large as 40 L, while it rarely goes beyond 5 L for ships. Results also show that a turning maneuver starting at planing mode might end in semi-planing mode. This transition can remarkably improve the performance characteristics of the planing craft’s maneuverability. Therefore, an alternative practice is proposed instead of the classic turning maneuver. In this practice, the craft traveling in the planing mode is transitioned to the semi-planing mode by forward speed reduction first, and then the turning maneuver is executed.

Full-scale tests of the trash racks of the Kapchagai hydroelectric station

1984 ◽  
Vol 18 (4) ◽  
pp. 166-170
Author(s):  
A. L. Rakhmanova ◽  
I. O. Rybak
Keyword(s):  
Hydroelectric Station ◽  
Full Scale ◽  
Full Scale Tests
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