Technology and Practical Use of Strain Gages With Particular Consideration of Stress Analysis Using Strain Gages

2017 ◽  
Author(s):  
Stefan Keil
Keyword(s):  
Stress Analysis ◽  
Strain Gages

Hybrid stress analysis of perforated composites using strain gages

2001 ◽  
Vol 41 (2) ◽  
pp. 195-203 ◽  
Author(s):  
T. H. Baek ◽  
R. E. Rowlands
Keyword(s):  
Stress Analysis ◽  
Strain Gages ◽  
Hybrid Stress

Geotechnical Instrumentation: Monitoring Longitudinal Stress of a High Pressure Pipeline During Longwall Mining Operations — A Case Study in West Virginia

2016 ◽  
Author(s):  
Martin P. Derby ◽  
Mark D. Saunders ◽  
Benjamin Zand
Keyword(s):  
High Pressure ◽  
West Virginia ◽  
Stress Analysis ◽  
Longwall Mining ◽  
Monitoring Program ◽  
Solar Array ◽  
Strain Gages ◽  
Mining Operations ◽  
Strain Monitoring ◽  
Implementation Program

Longwall mining operations could compromise the integrity of high pressure pipelines by way of surface subsidence and soil strains. Prior to implementing field programs for monitoring subsidence, a preliminary mitigation/stress analysis study should be designed to determine the possible effects of the longwall mining operations on the pipeline(s). If the stress analysis indicates possible high stresses beyond the allowable limits of a pipeline, then a mitigation plan should be developed and implemented. Regardless of the anticipated stress level in a pipeline, a strain monitoring program is usually recommended. The purpose of this paper is to discuss the design of a pipeline strain monitoring program, which includes the installation of strain gages at critical locations along two adjacent pipelines. The study area includes a 12 inch diameter steel pipeline (for natural gas transport) and a 12 inch HDPE pipeline for water transport. The study area is located in a mountainous region of West Virginia. Prior to the field program, a laboratory pilot study was performed with strain gages on a test section of HDPE pipe to determine the best mounting procedures. The field implementation program included the installation of strain gages on the gas and water pipelines. Multiplexers, data loggers, a solar array and a satellite modem for 24/7 data transfer were installed, and monitored throughout the study. During the field implementation program several meteorological and geologic events occurred which caused some design changes in the field program.

Stress Analysis on Rectangular Cross-Sectional Ring Headers

1995 ◽  
Vol 117 (4) ◽  
pp. 293-297 ◽  
Author(s):  
M. Murata ◽  
M. B. Utzinger ◽  
D.-H. Chen ◽  
H. Nisitani
Keyword(s):  
Stress Analysis ◽  
Cover Plate ◽  
Type I ◽  
Strain Gages ◽  
Cross Sectional ◽  
Weld Shape ◽  
Tangential Stresses ◽  
Asme Code ◽  
Flat Cover ◽  
Theoretical Stress

For rectangular cross-sectional ring headers, the authors’ theoretical stress analysis is presented to agree with actual stresses by measurement with strain gages. Therefore, this analytical method is applicable for similar rectangular cross-sectional ring headers. When the aspect ratio (length of two cylinders/radius difference between two cylinders) is more than three, moments originating at the end of finite long cylinders and tangential stresses on the half-length of both cylinders are almost the same as values from infinitely long cylinders. Regarding the welds between flat cover plates and cylinders, cover plate designs can be remarkably thinner by changing the weld shape, that is, by using T-joint weld with a single-bevel groove, than compared to Type (i) in PG-31 of ASME Code.

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