A New Constitutive Model for Alumina Powder                    Compaction

Cazacu, Oana; Jin, Jishan; Cristescu, N.

doi:10.14356/kona.1997014

Cited by 19 publications

(4 citation statements)

References 8 publications

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“…It appears that shear influences the compaction mechanisms. Similar conclusions have been reported by Cazacu et al [19] for alumina powder and recently by Burlion et al [25] for a very fine aggregate concrete. As a consequence, the deviatoric and hydrostatic responses cannot be considered to be decoupled.…”

Section: Conclusion and Final Remarkssupporting

confidence: 91%

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Experimental and theoretical investigation of the high‐pressure behavior of concrete

Schmidt

Cazacu

Green

2008

Num Anal Meth Geomechanics

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The results of an experimental study aimed at characterizing the behavior of concrete for high confining pressures (up to 500 MPa) are reported. The main characteristics of the response under deviatoric conditions are quasi‐linearity in the elastic regime, stress‐path dependency, and gradual change from compressibility to dilatancy under increasing deviatoric stress. By performing the cyclic triaxial compression tests with several load–creep–unload and reload cycles, the time influence on the overall behavior was detected. Further, whether the main features of the observed behavior can be described within the framework of elastic/viscoplasticity theory was investigated. For this purpose, Cristescu's (Rock Rheology. Kluwer Academic Publishers: The Netherlands, 1989) approach was used. It was shown that the proposed elastic/viscoplastic model captures the main features of concrete behavior at high pressures. Copyright © 2008 John Wiley & Sons, Ltd.

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Section: Conclusion and Final Remarkssupporting

confidence: 91%

“…The only restriction imposed on the tensor-valued N (r), which defines the orientation of the viscoplastic strain rate, is to be isotropic (see [19] …”

Section: Elastic-viscoplastic Model Developmentmentioning

confidence: 99%

Experimental and theoretical investigation of the high‐pressure behavior of concrete

Schmidt

Cazacu

Green

2008

Num Anal Meth Geomechanics

Self Cite

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“…Xi et al (2009) used Generalized Xi-Yuan model to study the creep behavior of granite under thermal coupling effects, based on which stress threshold and temperature threshold existed. Although in recent years great progresses had been made for rock creep and models (Enrico and Tsutomu, 2001;Cazacu et al, 1997;Maranini and Brignoli, 1999;Lade, 1994;Tai-Tien and Tsan-Hwei, 2009;Okubo et al, 1991;Cristescu, 1993;Dahou et al, 1995;Shao and Henry, 1991), similar rock specimens' creep test itself is a very special test style, self-defined creep constitutive model and FLAC 3D secondary development by creep tests is even rare. In view of this, similar rock specimens' creep test was done, based on which nonlinear creep constitutive model was built and the model was nested into FLAC 3D , numerical simulation results were in line with the test results.…”

Section: Introductionmentioning

confidence: 99%

Similar Rock Specimen\'s Creep Constitutive Test and Realization by FLAC<sup>3D</sup>

Chen¹,

Zhu²,

Li³

et al. 2014

RJASET

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In order to reveal rocks' deformation law under long-time load, similar rock specimens' creep constitutive was studied with a comprehensive method of theoretical analysis, test and numerical simulation. Samples' conventional tests were done with WAW-32000 testing machine and indoor long-time creep tests were done with RLJW-2000 testing machine. Results show that, similar rock specimens' uniaxial compressive strength is 2.65 MPa; when stress is lower than its failure threshold 4.792 KN, specimens appear only two stages of initial creep and steady-state creep; when stress is higher than the threshold, specimens appear accelerated creep stage. According to the test and equivalent coordination deformation principle, nonlinear CYJ creep constitutive is derived and nested into FLAC 3D , model's solution agrees well with the test results.

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“…Most experimental data on porous materials such as powders, soils, and rocks show a clear dependence of the elastic parameters on the stress state (see Lade [2], Homand et al [3], Niandou et al [4]; Cazacu et al [5], etc.). The necessary and sufficient conditions for an isotropic material with stress-dependent elastic parameters to be hyperelastic were established by Loret [6].…”

Section: Introductionmentioning

confidence: 99%

A new hyperelastic model for transversely isotropic solids

Cazacu¹

2002

Z. angew. Math. Phys.

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Experimental studies on porous materials show a clear dependence of the elastic parameters on the state of stress. In this paper, the implications of this stress dependency on the recoverability of strain and on the work done during a closed stress path for transversely isotropic materials are examined. The necessary and sufficient conditions for an elastic material to be hyperelastic are given. It is shown that the elastic parameters cannot depend on the third stress invariant and that the shear modulus in the plane normal to the axis of symmetry is a linear combination of the other parameters (i.e. the Saint-Venant's approximation [1] is satisfied). Finally, an example of application of the proposed hyperelastic model is presented.

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A New Constitutive Model for Alumina Powder Compaction

Cited by 19 publications

References 8 publications

Experimental and theoretical investigation of the high‐pressure behavior of concrete

Experimental and theoretical investigation of the high‐pressure behavior of concrete

Similar Rock Specimen\'s Creep Constitutive Test and Realization by FLAC<sup>3D</sup>

A new hyperelastic model for transversely isotropic solids

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