scholarly journals On the interpretation of lateral manganin gauge stress measurements in polymers

2010 ◽  
Vol 108 (3) ◽  
pp. 033524 ◽  
Author(s):  
Gareth J. Appleby-Thomas ◽  
Paul J. Hazell ◽  
James M. Wilgeroth ◽  
David C. Wood
Keyword(s):  
Stress Measurements ◽  
Manganin Gauge

Residual stress measurements and modeling of built-up Box-T sections

2021 ◽  
Vol 160 ◽  
pp. 107336
Author(s):  
Ziqian Zhang ◽  
Gang Shi ◽  
Xuesen Chen ◽  
Lijun Wang ◽  
Le Zhou
Keyword(s):  
Residual Stress ◽  
Stress Measurements

STRESS MEASUREMENTS IN RAILWAY RAILS USING THE ULTRASONIC METHOD

2019 ◽  
Author(s):  
Shirley García ◽  
Thairon Reis ◽  
Auteliano Antunes dos Santos Junior
Keyword(s):  
Ultrasonic Method ◽  
Stress Measurements

scholarly journals Rock Stress Measurements for Unlined Pressure Tunnels: A True Triaxial Laboratory Experiment to Investigate the Ability of a Simplified Hydraulic Jacking Test to Assess Fracture Normal Stress

2021 ◽  
Author(s):  
Henki Ødegaard ◽  
Bjørn Nilsen
Keyword(s):  
Normal Stress ◽  
Test Method ◽  
Sudden Increase ◽  
Normal Stresses ◽  
True Triaxial ◽  
Step Rate ◽  
Stress Measurements ◽  
Fracture Closure ◽  
Rate Test ◽  
Hydraulic Jacking

AbstractTo avoid hydraulic failure of unlined pressure tunnels, knowledge of minimum principal stress is needed. Such knowledge is only obtainable from in situ measurements, which are often time-consuming and relatively costly, effectively limiting the number of measurements typically performed. In an effort to enable more stress measurements, the authors propose a simplified and cost-effective stress measuring method; the Rapid Step-Rate Test (RSRT), which is based on existing hydraulic testing methods. To investigate the ability of this test to measure fracture normal stresses in field-like conditions, a true triaxial laboratory test rig has been developed. Hydraulic jacking experiments performed on four granite specimens, each containing a fracture, have been performed. Interpretation of pressure-, flow- and acoustic emission (AE) data has been used to interpret fracture behaviour and to assess fracture normal stresses. Our experimental data suggest that the proposed test method, to a satisfactory degree of reliability, can measure the magnitude of fracture normal stress. In addition, a clear correlation has been found between fracture closure and sudden increase in AE rate, suggesting that AE monitoring during testing can serve as a useful addition to the test. The rapid step-rate test is also considered relevant for field-scale measurements, with only minor adaptions. Our findings suggest that the RSRT can represent a way to get closer to the ideal of performing more testing along the entire length of pressure tunnel, and not only at key locations, which requires interpolation of stress data with varying degree of validity.

Direction-sensitive stress measurements with carbon nanotube sensors

2002 ◽  
Vol 13 (10-12) ◽  
pp. 759-764 ◽  
Author(s):  
Qing Zhao ◽  
Mark D. Frogley ◽  
H. Daniel Wagner
Keyword(s):  
Carbon Nanotube ◽  
Stress Measurements
Sign in / Sign up

Export Citation Format

Share Document