Abstract
The interpretation of post-peak stress-strain relationship from laboratory compression tests performed on strain-softening clay specimens under undrained condition is considered. Since failure of a strain-softening material is accompanied by strain localization, the post-peak stress and strain distributions will be highly inhomogeneous. Standard interpretation techniques will then overestimate the rate of softening significantly, i.e. the steepness of the post-peak stress-strain curve is overestimated. Finite element analyses of a biaxial compression test are used to demonstrate this effect by simulation. The effect of strain-softening is accounted for by an elasto-plastic strain softening material model within the concept of total stresses, using the Tresca yield criterion. Some comments are also made concerning the severe mesh dependency associated with the use of a strain-softening material model.
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References
BRINKGREVE, R.B.J. (1994). Geomaterial models and numerical analysis of softening Ph.d. thesis, Delft University of Technology.
CRISFIELD, M.A. (1982). Accelerated solution techniques and concrete cracking. Comp. Meth. in Appl. Mech. and Eng., 33, 585–607
JOSTAD, H.P. (1993). Bifurcation analysis of frictional materials. Ph.d. thesis, University of Trondheim, Norwegian Institute of Technology
LACASSE S., T. BERRE & G. LEFEBVRE (1985). Block Sampling of Sensitive Clays. XI Int. Conf. on Soil Mech. and Found. Eng., San Francisco, Vol. 2: 887–892
LADD, C.C. (1971). Strength Parameters and Stress-Strain Behaviour of Saturated Clays. MIT, Dep. of Civil Eng., Research Report R71–23
LIZCANO A., I. VARDOULAKIS & M. GOLDSCHEIDER (1997). Biaxial tests on normally, anisotropically consolidated clay. Proc. Def. and Prog. Failure in Geomech., IS NAGOYA’97: 223–228
PIETRUSZCZAK, ST. & D.E.F. STOLLE (1985). Part I: Objectivity of finite element solutions based on conventional strain softening formulations. Computers and Geotechnic 1, 99–115
PIETRUSZCZAK, S.T. & Z. MRÓZ (1981). Finite Element Analysis of Deformation of Strain-Softening Materials. Int. J. Num. Meth. Eng., Vol. 17, 327–334, 1981
RHEE, Y. (1991). Experimental evaluation of strain-softening behaviour of normally consolidated Chicago clays in plane strain compression. Ph.D. thesis, Northwestern University, IL, USA, 1991
VERMEER, P.A. & R. DE BORST (1984) Non-associated plasticity for soil, concrete and rock. HERON 29, NO. 3, pp. 1–64.
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© 1998 Springer-Verlag Wien
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Andresen, L., Jostad, H.P. (1998). Effect of Strain-Softening in Interpretation of Laboratory Compression Tests. In: Cividini, A. (eds) Application of Numerical Methods to Geotechnical Problems. International Centre for Mechanical Sciences, vol 397. Springer, Vienna. https://doi.org/10.1007/978-3-7091-2512-0_21
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DOI: https://doi.org/10.1007/978-3-7091-2512-0_21
Publisher Name: Springer, Vienna
Print ISBN: 978-3-211-83141-0
Online ISBN: 978-3-7091-2512-0
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