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Keywords: fringe order
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Proceedings Papers

Paper presented at the The 21st U.S. Symposium on Rock Mechanics (USRMS), May 27–30, 1980
Paper Number: ARMA-80-0506
... to achieve in practice. Usually two measurements of a fringe order at a point or within its vicinity are required to separate principal strains. It is proposed that the accuracy and usefulness of a particular method 506 be evaluated by examining the term (1) n I - n 2 U - f where n 1 and n 2 are the two...
Proceedings Papers

Paper presented at the The 18th U.S. Symposium on Rock Mechanics (USRMS), June 22–24, 1977
Paper Number: ARMA-77-0326
... to the R.H.S. of equation (3). The optimum point for measuring the fringe order n in biaxial stress fields is located along the minor stress axis where 0=0. Making this substitution for 0 greatly simplifies the final equation, which upon a number of rearrangements results in n Eh f r e 1 + n + 2(1 - n) (3a e 2...
Proceedings Papers

Paper presented at the The 17th U.S. Symposium on Rock Mechanics (USRMS), August 25–27, 1976
Paper Number: ARMA-76-0543
... which is an optical grade polyurethane rubber, and needs no external loading to produce measureable fringe orders and de- flections over spans of less than one foot. Such a material will typically have a modulus of elasticity of 1000 psi, Poisson's ratio of 0.45, a fringe con- stant of 0.46 psi/fringe...
Proceedings Papers

Paper presented at the The 14th U.S. Symposium on Rock Mechanics (USRMS), June 11–14, 1972
Paper Number: ARMA-72-0107
... operational safety criterion pillar model Upstream Oil & Gas dimension prediction Reservoir Characterization rock pillar oondition experiment metals & mining mechanical behavior fringe order pillar finite element analysis laboratory simulation Rock mechanics potential...
Proceedings Papers

Paper presented at the The 10th U.S. Symposium on Rock Mechanics (USRMS), May 20–22, 1968
Paper Number: ARMA-68-0503
...) STRESS METER 505 Fig. 2--Reading the PU stress meter. A--Optical system. Photographic record, 12-ft depth. HAND ANALYZER -I- CI RCULARLY GLASS POLAR IZING CYLINDER FILTER WEDGE MECHANISM .IBi preload and is measured in terms of the photoelastic isochromatic fringe order at the center of the glass...

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