caa a22 4500 467931135 CHVBK 20180406152943.0 cr unu---uuuuu 170328e20061001xx s 000 0 eng 10.1007/s10706-005-1880-9 doi (NATIONALLICENCE)springer-10.1007/s10706-005-1880-9 Hamami M. Civil Engineering Department, Laboratoire de Recherche en Mathématiques Appliquées et Calcul Scientifique (LARMACS), University of Skikda, B.P. 26, 21000, Skikda, Algeria aut Experimental and numerical studies of rock salt strain hardening [Elektronische Daten] [M. Hamami] The work presented in this paper comes as part of a research program dealing with the thermomechanical behaviour of rock salt. It aims to study laboratory and in-situ long-term behaviour by means of creep tests with deviator and temperature changes. The laboratory results, using a triaxial multi-stages creep tests, highlighted the strain hardening character of rock salt. Furthermore, the in-situ results, using a borehole dilatometer multi-step creep test, have shown that the drilling is carried out in a weakly stressed pillar. The interpretation of the laboratory results, using the J.LEMAITRE law, did not indicate full agreement with all the test results. As a result a ‘double' J.LEMAITRE model, which takes into account a double strain hardening variable, has been put forward. The validation of this model on the laboratory creep tests is very satisfactory. Furthermore, the activation energy seems satisfactory to represent the influence of the temperature. The in-situ behaviour modelling is clearly more complex than the modelization based on laboratory tests. In fact, it seems that if the rock salt behaviour is maintained by J.LEMAITRE law, it is necessary to vary with the stress, at least, one of the parameters assumed constant in the basic law. Springer, 2006 in-situ creep test nationallicence J.LEMAITRE rock salt model nationallicence multi-stages creep nationallicence strain hardening nationallicence Geotechnical & Geological Engineering Kluwer Academic Publishers 24/5(2006-10-01), 1271-1292 0960-3182 24:5<1271 2006 24 10706 https://doi.org/10.1007/s10706-005-1880-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10706-005-1880-9 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hamami M. Civil Engineering Department, Laboratoire de Recherche en Mathématiques Appliquées et Calcul Scientifique (LARMACS), University of Skikda, B.P. 26, 21000, Skikda, Algeria aut NATIONALLICENCE 773 0- Geotechnical & Geological Engineering Kluwer Academic Publishers 24/5(2006-10-01), 1271-1292 0960-3182 24:5<1271 2006 24 10706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer