Time-Dependent Mechanical Response of HDPE Geomembranes
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 123, Issue 1
Abstract
Characterization of the long-term mechanical response of geomembranes used in waste-containment facilities is crucial to designing base liner and cover systems that perform satisfactorily. To investigate the long-term mechanical response, strain-controlled multiaxial tension testing was performed over a fourfold variation of strain rate using a newly developed multiaxial tension-test apparatus capable of performing constant strain rate and constant stress creep tests. This device subjects a geomembrane specimen to multiaxial stress states and allows for the development of strain conditions that vary from plane strain at the clamped edges to balanced biaxial at the center. Results from testing high-density polyethylene (HDPE) specimens indicate that the secant modulus and strength decreases considerably at strain rates appropriate for long-term field applications. The strength of HDPE measured at a typical laboratory strain rate of 1% per minute can be more than twice the strength predicted at a strain rate of 1E-6% per minute, which may be representative of field performance for a typical 30-year design life. A hyperbolic model and the Singh-Mitchell creep model (which was originally formulated for soils) are shown to capture the time-dependent mechanical response of HDPE well.
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References
1.
Berg, R. R., and Bonaparte, R.(1993). “Long-term allowable tensile stresses for polyethylene geomembranes.”Geotextiles and Geomembranes, 12(4), 287–306.
2.
de Lorenzi, H. G., Nied, H. F., and Taylor, C. A.(1991). “A numerical/experimental approach to software development for thermoforming simulations.”Pressure Vessel Technol., 113, 102–114.
3.
Duvall, D. E. (1993). “Creep and stress rupture testing of a polyethylene geomembrane under equal biaxial stress.”Proc., Geosynthetics '93, IFAI, St. Paul, Minn., 817–830.
4.
Geosynthetic Research Institute. (1991). Three dimensional geomembrane tension test, GRI GM4, Philadelphia, Pa.
5.
Giroud, J. P., Bonaparte, R., Beech, J. F., and Gross, B. A.(1990). “Design of soil layer-geosynthetic systems overlying voids.”Geotextiles and Geomembranes, 9(1), 11–50.
6.
Giroud, J. P.(1994). “Mathematical model of geomembrane stress-strain curves with a yield peak.”Geotextiles and Geomembranes, 13(1), 1–22.
7.
Giroud, J. P. (1995). “Determination of geosynthetic strain due to deflection.”Geosynthetics Int., (3), 635–641.
8.
Koerner, G. R., and Koerner, R. M. (1995). “Temperature behavior of field deployed HDPE geomembranes.”Proc., Geosynthetics '95, IFAI, St. Paul, Minn., 921–937.
9.
Koerner, R. M., Koerner, G. R., and Hwu, B. (1990). “Three dimensional axisymmetric geomembrane tension test.”Geosynthetic testing for waste containment applications, ASTM STP 1081, R. M. Koerner, ed., ASTM, Philadelphia, Pa., 170–184.
10.
Merry, S. M., Bray, J. D., and Bourdeau, P. L.(1993). “Axisymmetric tension testing of geomembranes.”Geotech. Testing J., 16(3), 384–392.
11.
Merry, S. M., Bray, J. D., and Bourdeau, P. L. (1995). “Stress-strain compatibility of geomembranes subjected to out-of-plane subsidence.”Proc., Geosynthetics '95, IFAI, St. Paul, Minn., 799–812.
12.
Merry, S. M., and Bray, J. D. (1995). “Size effects for axisymmetric testing of geomembranes.”Geotech. Testing J. 18(4), 441–449.
13.
Merry, S. M. (1995). “Mechanical response and properties of geomembranes,”PhD thesis, Univ. of California, Berkeley, Calif.
14.
Merry, S. M., and Bray, J. D. (1996). “Geomembrane response in the wide-strip tension test.”Geosynthetics Int., 3(4).
15.
Prager, W. (1955). “The theory of plasticity: a survey of recent achievements.”Proc., The Institute of Mechanical Engineering, Westminster, London, Vol. 169, 41–57.
16.
Singh, A., and Mitchell, J. K.(1968). “General stress-strain-time function for soils.”J. Soil Mech. and Found. Div., ASCE, 94(1), 21–46.
17.
Sousa, J., and Chan, C. K. (1991). “Computer applications in the geotechnical laboratories of the University of California, at Berkeley.”Proc., Geotech. Engrg. Congr., ASCE, New York, N.Y., 531–543.
18.
Standard test method for determining performance strength of geomembranes by the wide strip tensile method; D4885-88. (1988). ASTM, Philadelphia, Pa.
19.
Standard test method for multi-axial tension test for geosynthetics; D5617-94. (1994a). ASTM, Philadelphia, Pa.
20.
Standard test method for tensile properties of plastics; D638-94b. (1994b). ASTM, Philadelphia, Pa.
21.
White, D., and Kolbasuk, G. (1990). “Specifying and testing tensile properties of semi-crystalline membranes.”Geotech. Fabrics Rep., IFAI, St. Paul, Minn., 18.
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Copyright © 1997 American Society of Civil Engineers.
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Published online: Jan 1, 1997
Published in print: Jan 1997
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