An internal variable model for the creep of rocksalt

Aubertin, Michel; Gill, D.E.; Ladanyi, B.

doi:10.1007/bf01032500

Cited by 44 publications

(21 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The creep controlled by dislocation mechanisms is widely investigated in laboratory experiments (Carter and Hansen 1983;Carter et al 1993;Rutter 1983;Urai et al 1986;Wawersik and Zeuch 1986;Heard and Ryerson 1986;Senseny et al 1992;van Keken et al 1993;Franssen 1994;Peach and Spiers 1996;Weidinger et al 1997;De Meer et al 2002;Hampel et al 1998;Brouard and Bérest 1998;Bérest et al 2005;Ter Heege et al 2005a, b). The creep equations mainly used in the salt mining industry are based on dislocation creep processes quantified in laboratory experiments (Ottosen 1986;Haupt and Schweiger 1989;Aubertin et al 1991;Cristescu 1993;Munson 1979Munson , 1997Jin and Cristescu 1998;Hampel et al 1998;Hampel and Schulze 2007;Hunsche and Hampel 1999;Peach et al 2001;Fossum and Fredrich 2002). The steady-state strain rate is related to the flow stress r using a power law creep (non-Newtonian) equation:…”

Section: Deformation Mechanisms Of Rock Saltmentioning

confidence: 99%

Rheology of rock salt for salt tectonics modeling

Urai

2016

Pet. Sci.

View full text Add to dashboard Cite

Numerical modeling of salt tectonics is a rapidly evolving field; however, the constitutive equations to model long-term rock salt rheology in nature still remain controversial. Firstly, we built a database about the strain rate versus the differential stress through collecting the data from salt creep experiments at a range of temperatures (20-200°C) in laboratories. The aim is to collect data about salt deformation in nature, and the flow properties can be extracted from the data in laboratory experiments. Moreover, as an important preparation for salt tectonics modeling, a numerical model based on creep experiments of rock salt was developed in order to verify the specific model using the Abaqus package. Finally, under the condition of low differential stresses, the deformation mechanism would be extrapolated and discussed according to microstructure research. Since the studies of salt deformation in nature are the reliable extrapolation of laboratory data, we simplified the rock salt rheology to dislocation creep corresponding to power law creep (n = 5) with the appropriate material parameters in the salt tectonic modeling.

show abstract

Section: Deformation Mechanisms Of Rock Saltmentioning

confidence: 99%

Rheology of rock salt for salt tectonics modeling

Urai

2016

Pet. Sci.

View full text Add to dashboard Cite

show abstract

“…The mean values of the curves, m A are calculated as in Equation. (29). The index m is the counter for real time, .…”

Section: Methodsmentioning

confidence: 99%

“…All other unknowns, κ1, κ2, κ3, D2, k, a2, b and p are the parameters of the equation. Parameter σx is the mean internal stress [29]. These parameters can be evaluated by fitting the numerical creep curve with experimental creep data.…”

Section: Peridynamic Formulation and Materials Modelingmentioning

confidence: 99%

Peridynamic model for nonlinear viscoelastic creep and creep rupture of Polypropylene

Azizi

Ariffin

2019

JMES

View full text Add to dashboard Cite

This paper presents the peridynamic numerical method for nonlinear viscoelastic creep behaviour which consists of primary, secondary, tertiary creep stages and creep rupture. A nonlinear viscoelastic creep constitutive equation based on internal state variable (ISV) theory which covers four creep stages is examined. The viscoelastic equation is substituted into material parameter in the peridynamic equation to derive a new peridynamic method with two time parameters i.e. numerical time and real time. The parameters of the viscoelastic equation is analyzed and evaluated. In validating this peridynamic method, a comparison is made between numerical and experimental data. The peridynamic method for nonlinear viscoelastic creep behaviour (VE-PD) is approved by the good similarity between numerical and experimental creep strain curves with overall difference of 10.67%. The nonlinearity of experimental and numerical data is adequately similar as the error between experimental and numerical curves of secondary stage strain rate against load is 8.022%. The shapes of fractured numerical specimen show good resemblance with the experimental result as well.

show abstract

“…Some models describe the transient and stationary state of the strain (Lux et al, 2001), while others are quite complex and are therefore difficult to use. The models based on the strain microphysic approach seem to describe correctly the rock salt behaviour, but their prediction capacity is not completely definitive (Munson and Dawson, 1984;Poirier, 1985;Spiers and al., 1990;Aubertin et al, 1991aAubertin et al, , 1991bAubertin et al, , 1991cAubertin et al, , 1996Munson et al, 1996). However, there is not a unanimous view regarding the presence or the absence of a stationary phase and the latter remains subjective to the in-situ data measures analysis.…”

Section: Introductionmentioning

confidence: 93%

Experimental and numerical studies of rock salt strain hardening

Hamami

2006

Geotech Geol Eng

View full text Add to dashboard Cite

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.

show abstract

An internal variable model for the creep of rocksalt

Cited by 44 publications

References 26 publications

Rheology of rock salt for salt tectonics modeling

Rheology of rock salt for salt tectonics modeling

Peridynamic model for nonlinear viscoelastic creep and creep rupture of Polypropylene

Experimental and numerical studies of rock salt strain hardening

Contact Info

Product

Resources

About