Abstract
The measurement of strain on a structural member in the presence of high-pressure water environment requires waterproofing of the gages as well as understanding of the pressure effect on the foil gages. Two new waterproofing methods are developed to protect the gage under these extremely high pressures. This study has resulted in a new compensating method which eliminates the effects of temperature and pressure simultaneously. The waterproofing materials studied during this investigation are superior to other earlier techniques reported in literature since they provide protection up to 11,500 psi (80 MPa) while previously existing techniques failed before this pressure. Also, these studies on the pressure effect deal with the realistic situation of coated strain gages in a water environment, as compared to previous studies which dealt with uncoated strain gages in an oil environment.
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References
Lane, P.H.R., “Notes on the Use of Resistance Strain Gages,”Engineer,204 (5315),812–815 (1957).
Mantle, K.G., Marshall, N. andPalmer, P.J., “Experimental Investigation into the Stress Distribution in a Band-Reinforced Pressure Vessel,”Proc. IME,173 (29),pt. 1,907–929 (1964-1965).
Lane, P.H.R. andRose, R.T., “Experiments on Fabricated Pipe Bends,”Brit. Welding J.,8 (6),323–334 (1961).
Westhausser, R. and Wittmann, G.A., “A Method for Waterproofing Electric Resistance Strain Gages and Lead Wires Against Water at High Pressure Experimental Verication,” 2nd Inter. Stress Analysis Conf., April 10–14, Paris, France (1962).
Palermo, P.M., “Methods of Waterproofing SR-4 Strain Gages,”Proc. of the SESA,13 (2),79–88 (1956).
Palermo, P.M., “Experimental Stress Analysis Goes Deep,”Naval Engrs. J.,87 (4),67–82 (1975).
Dean, M. III, “Vulcanized-rubber Protection for Strain Gages in a Seawater Environment,”Experimental Mechanics,17 (8),303–307 (1977).
Andersen, S.T. and Enback, P., “Interpretation of Strain Measurements on Nuclear Pressure Vessels,” Paper G 10/1, 5th Inter. Conf. on Struct. Mech. in Reactor Tech., Berlin (West) (Aug. 13–17, 1979).
Spaas, H.A.C.M., “Deformation Behavior of Large, High Pressure Vessel Flanges,” Developments in Stress Analysis for Pressurized Components, Applied Science Publishers, 1–48 (1977).
Bush, A.J., “Soldered-Cap Strain Gages,”Machine Design,34 (26),163–164 (1962).
Brace, W.F., “Effect of Pressure on Electrical-resistance Strain Gages,”Experimental Mechanics,4 (7),212–216 (1964).
Gerdeen, J.L., “Effect of Pressure on Small Foil Strain Gages,”Experimental Mechanics,3 (3),77–80 (1963).
Milligan, R.V., “On the Use of Foil Strain Gages to Measure Internal Strains of Thick-walled Cylinders,”ISA-Trans,15 (1),95–99 (1976).
Milligan, R.V., “The Gross Hydrostatic-pressure Effect as Related to Foil and Wire Strain Gages,”Experimental Mechanics,7 (2),67–74 (1967).
Kudo, H. andNakane, T., “A Method of Strain Measurement on the Inner Surface of High-Pressure Vessels,”J. Mech. Lab. of Japan,8 (1),31–37 (1962).
Chen, J.C. and Fung, Y.J., “On the Measurements of Stress and Strain Under High Water Pressure Condition,” unpublished research report, Peking Petroleum Institute (1966).
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Khan, A.S., Chen, J.C. On the measurement of strain in the hostile environment of high-pressure water (80 MPa). Experimental Mechanics 22, 401–406 (1982). https://doi.org/10.1007/BF02326820
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DOI: https://doi.org/10.1007/BF02326820