고무의 Bulging을 이용한 O-링의 접촉압력 측정

김원호

Polymer(Korea), Vol.19, No.5, 551-560, September, 1995

Export Citation

고무의 Bulging을 이용한 O-링의 접촉압력 측정

Measurements of Contact Pressure of a Squeezed O-ring(Rubber Disc) by Using Rubber Bulging through a Hole

김원호

초록

두 평판 결합체 사이에 설치된 고무 디스크를 반경방향으로 압축하면서 접촉면에 만든 작은 구멍을 통한 고무의 bulge 되는 높이를 측정하여 접촉압력을 구하였다. 자유변형일 경우, bulge 높이 측정법으로 측정한 최대 접촉응력은 반경방향 변형이 증가됨에 따라 비선형적으로 증가하였으며 Curro의 식과 잘 일치하였다. 그러므로 bulge 높이 측정법은 Muller 방법과 상호 보완적으로 접촉압력을 측정하는데 이용될 수 있음을 확인하였다. 제한변형일 경우, 최대 접촉응력은 무차원 반경방향 변형(χ/D) 값이 0.01 부터 0.18 사이에서 변할 경우에 선형적이었고 자유변형의 경우보다 높은 값을 나타내었으며 이 경향은 χ/D 값이 증가할수록 현저하였다. 접촉응력 분포는 semi-ellipse처럼 보였으며, 포아송 비가 증가할수록 반경방향 변형에 따른 최대 접촉응력 값은 증가하였다.

A rubber disc confined between two plates was radially compressed to measure the contact pressure of an O-ring. Contact pressure was determined by the bulge height of a rubber disc which was measured by a wood probe through a hole. In the case of laterally unrestrained compression, the maximum contact stress increases non-linearly as a function of radial deformation and was in good agreement with the Curro's analytical equation. As a result, bulge height measurement method compensates the Muller's method in measuring contact pressure. In the case of restrained compression, the maximum contact stress was linearly proportional to radial deformation in the range of 0.01 < χ/D < 0.18. This trend was more significant as the value of χ/D was increased. The shape of the contact stress distribution looks like a semi-ellipse and the maximum contact stressincreased as the value of the Poisson's ratio was increased.

Keywords:rubber bulging;O-ring;contact pressure;bulge height

[References]

Gorelik BM, Feld'man GI, Soviet Rubber Technol., 22(4), 27 (1963)
Molari PG, 6th International Conference on Fluid Sealing, BHRA, Munich, GFR, B2/15-31, Feb. 27-Mar. 2 (1973)
Medri G, Strozzi A, Ind. Eng. Chem. Prod. Res. Dev., 23, 596 (1984)
Strozzi A, "Experimental Stress Analysis," ed. H. Wieringa, p. 613-622, Martinus Nijhoff Publ. (1986)
Patri E, Strozzi A, J. Tribology, 106, 505 (1984)
Dragoni E, Medri G, Strozzi A, 11th International Conference on Fluid Sealing, BHRA, Cannes, France, B3/160-174 (1987)
Muller HK, 2nd International Conference on Fluid Sealing, BHRA, Cranfield, UK, B2/13-28 (1964)
Gent AN, Kim W, Rubber Chem. Technol., 64, 813 (1991)
Gorelik BM, Buhina MF, Ratner AV, Soviet Rubber Technol., 20(1), 10 (1961)
Gorelik BM, Feld'man GI, Soviet Rubber Technol., 23(4), 21 (1964)
Lindley PB, J. IRI, 4, 209 (1967)
Curro JG, Salazar EA, Rubber Chem. Technol., 46, 530 (1973)
Ebisu T, Yamamoto M, Maekawa H, Onodera A, PATRAM 83, 672 (1983)
George AF, Strozzi A, Rich JI, Tribol. Int., 20, 237 (1987)
Clarke NWB, Inst. Public Health Engrs. J., 63(2), 108 (1964)
Hertz H, "Miscellaneous Papers," Translated by D.E. Jones and G.A. Schott, p. 146, Macmillan and Co., London (1896)
Johannesson H, "Calculationof the Pressure Distribution in an O-ring Seal Contact," Mechanical Engineering Publication, London (1978)
Dragoni E, Strozzi A, J. Tribol., 110, 173 (1988)
Gehman SD, Rubber Chem. Technol., 41, 1122 (1968)

[1] Gorelik BM, Feld'man GI, Soviet Rubber Technol., 22(4), 27 (1963)

[2] Molari PG, 6th International Conference on Fluid Sealing, BHRA, Munich, GFR, B2/15-31, Feb. 27-Mar. 2 (1973)

[3] Medri G, Strozzi A, Ind. Eng. Chem. Prod. Res. Dev., 23, 596 (1984)

[4] Strozzi A, "Experimental Stress Analysis," ed. H. Wieringa, p. 613-622, Martinus Nijhoff Publ. (1986)

[5] Patri E, Strozzi A, J. Tribology, 106, 505 (1984)

[6] Dragoni E, Medri G, Strozzi A, 11th International Conference on Fluid Sealing, BHRA, Cannes, France, B3/160-174 (1987)

[7] Muller HK, 2nd International Conference on Fluid Sealing, BHRA, Cranfield, UK, B2/13-28 (1964)

[8] Gent AN, Kim W, Rubber Chem. Technol., 64, 813 (1991)

[9] Gorelik BM, Buhina MF, Ratner AV, Soviet Rubber Technol., 20(1), 10 (1961)

[10] Gorelik BM, Feld'man GI, Soviet Rubber Technol., 23(4), 21 (1964)

[11] Lindley PB, J. IRI, 4, 209 (1967)

[12] Curro JG, Salazar EA, Rubber Chem. Technol., 46, 530 (1973)

[13] Ebisu T, Yamamoto M, Maekawa H, Onodera A, PATRAM 83, 672 (1983)

[14] George AF, Strozzi A, Rich JI, Tribol. Int., 20, 237 (1987)

[15] Clarke NWB, Inst. Public Health Engrs. J., 63(2), 108 (1964)

[16] Hertz H, "Miscellaneous Papers," Translated by D.E. Jones and G.A. Schott, p. 146, Macmillan and Co., London (1896)

[17] Johannesson H, "Calculationof the Pressure Distribution in an O-ring Seal Contact," Mechanical Engineering Publication, London (1978)

[18] Dragoni E, Strozzi A, J. Tribol., 110, 173 (1988)

[19] Gehman SD, Rubber Chem. Technol., 41, 1122 (1968)