scholarly journals Experimental study of grouted sleeve lapping connector under tensile load

2017 ◽  
Vol 69 (06) ◽  
pp. 453-465
Keyword(s):  
Experimental Study ◽  
Tensile Load

Fracture Behavior of Cracked Ring Specimen at Different Crack Positions

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
Abdulmohsen M. Alqahtani ◽  
Thamer K. Albulayhid ◽  
Mutlaq N. Alotaibi ◽  
Ibrahim M. Alarifi ◽  
Tarek M. A. A. EL-Bagory
Keyword(s):  
Experimental Study ◽  
Energy Release Rate ◽  
Energy Release ◽  
Release Rate ◽  
Fracture Behavior ◽  
Radial Crack ◽  
Tensile Load ◽  
Plastic Pipe ◽  
Piping Systems ◽  
Crack Position

Abstract The previous research review of piping systems revealed that the plastic pipe companies suffered from many problems in natural gas pipeline systems. One of the most significant problems that appeared in the piping systems are external cracks due to manufacturing processes, welding technique, and installation processes. The principal goal of the present experimental study is to predict the crack growth behavior and energy release rate of cracked ring specimens made from high-density polyethylene (HDPE) under different crack position angles and various crosshead speeds. The effect of loading rate on the external radial crack at different crack position angles plays an important role in the prediction of fracture behavior of plastic pipe materials. For this reason, it is necessary to conduct a study for the fracture analysis of pipe ring specimens under tension loading with double external cracks at constant radial crack length to width ratio equal a/W = 0.5. A precracking machine is designed especially in the present experimental study to simulate the actual radial cracks at outer surface of pipe ring specimens. The effects of crosshead speed and crack position angle revealed a significant effect on the energy release rate and maximum applied load under tensile load.

Fracture Behavior of Cracked Ring Specimen at Different Crack Positions

2019 ◽  
Author(s):  
Abdulmohsen M. Alqahtani ◽  
Thamer K. Albulayhid ◽  
Mutlaq N. Alotaibi ◽  
Ibrahim M. Alarifi ◽  
Tarek M. A. A. El-Bagory
Keyword(s):  
Experimental Study ◽  
Energy Release Rate ◽  
Energy Release ◽  
Release Rate ◽  
Fracture Behavior ◽  
Radial Crack ◽  
Tensile Load ◽  
Ring Specimen ◽  
Piping Systems ◽  
Crack Position

Abstract The previous research review of piping systems revealed that the plastic pipes companies suffered from many problems in natural gas pipeline systems. One of the most significant problems appeared in the piping systems are external cracks due to manufacturing processes, welding technique and installation processes. The principal goal of the present experimental study is to predict the crack growth behavior and energy release rate of cracked ring specimen made from high-density polyethylene (HDPE) under different crack position angles and various crosshead speeds. The effect of loading rate on the external radial crack at different crack position angles plays an important role in the prediction of fracture behavior of plastic pipe materials. For this reasons, it is necessary to conduct a study for the fracture analysis of pipe ring specimen under tension loading with double external cracks at constant radial crack length to width ratio equal a/W = 0.5. Pre-cracking machine is designed especially in the present experimental study to simulate the actual radial cracks at outer surface of pipe ring specimens. The effects of crosshead speed and crack position angle are revealed a significant effect on the energy release rate and maximum applied load under tensile load.

Effects of end distance and thickness on the tensile resistance of 102 mm shear plates

1995 ◽  
Vol 22 (6) ◽  
pp. 1113-1119 ◽  
Author(s):  
P. Quenneville ◽  
A. Charron
Keyword(s):  
Experimental Study ◽  
Weibull Distribution ◽  
Key Words ◽  
Tensile Load ◽  
Design Standards ◽  
Unit Clause ◽  
Shear Plate ◽  
End Distance ◽  
Design Requirements ◽  
Two Parameter

In this paper, an experimental study of the behavior of 102 mm shear plates subjected to tensile load is presented. The design requirements for shear plate connectors specified in the last three editions of the Canadian wood design standards (1980, 1984, and 1989) are also reviewed and compared with the experimental results. In the experimental study, 83 specimens were tested with shear plate end distances of 80, 145, 210, and 275 mm. Specimens were either 64 or 89 mm thick. Results for all tests were analyzed and 5th percentile resistance values were obtained for each end distance value, assuming a two-parameter Weibull distribution. Results show that connections using 102 mm shear plate connectors behave in a brittle manner when loaded in tension. It is also shown that the member thickness affects the tensile resistance of shear plates in thin members with small connector end distances and that it appears to impose a limit on the resistance for thin members with large connector end distances. Finally, it is shown that the 75% minimum limit on a member net area adjacent to a connector unit (clause 4.3.7.2 of O86.1-M89) is conservative for members with small connector end distances. Key words: wood, shear plate, end distance, resistance, thickness.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study
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