TITLE

Anisotropic damage mechanics for viscoelastic ice

AUTHOR(S)
Pralong, A.; Hutter, K.; Funk, M.
PUB. DATE
February 2006
SOURCE
Continuum Mechanics & Thermodynamics;Feb2006, Vol. 17 Issue 5, p387
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present a formulation of continuum damage in glacier ice that incorporates the induced anisotropy of the damage effects but restricts these formally to orthotropy. Damage is modeled by a symmetric second rank tensor that structurally plays the role of an internal variable. It may be interpreted as a texture measure that quantifies the effective specific areas over which internal stresses can be transmitted. The evolution equation for the damage tensor is motivated in the reference configuration and pushed forward to the present configuration. A spatially objective constitutive form of the evolution equation for the damage tensor is obtained. The rheology of the damaged ice presumes no volume conservation. Its constitutive relations are derived from the free enthalpy and a dissipation potential, and extends the classical isotropic power law by elastic and damage tensor dependent terms. All constitutive relations are in conformity with the second law of thermodynamics.
ACCESSION #
19736203

 

Related Articles

  • A nonlocal continuum damage mechanics approach to simulation of creep fracture in ice sheets. Duddu, Ravindra; Waisman, Haim // Computational Mechanics;Jun2013, Vol. 51 Issue 6, p961 

    We present a Lagrangian finite element formulation aimed at modeling creep fracture in ice-sheets using nonlocal continuum damage mechanics. The proposed formulation is based on a thermo-viscoelastic constitutive model and a creep damage model for polycrystalline ice with different behavior in...

  • An internal damage model for viscoelastic-viscoplastic energetic materials. Matheson, E. R.; Drumheller, D. S.; Baer, M. R. // AIP Conference Proceedings;2000, Vol. 505 Issue 1, p691 

    A theoretical foundation constraining the forms of mechanical damage models for viscoelastic-viscoplastic energetic materials is developed. The theory is cast in terms of a viscoelastic-viscoplastic deviatoric stress tensor and a scalar viscoelastic-viscoplastic distention strain rate model. The...

  • Analysis of fracture damage zone in anisotropic granitic rock using 3D X-ray CT scanning techniques. Nasseri, M.; Rezanezhad, F.; Young, R. // International Journal of Fracture;Mar2011, Vol. 168 Issue 1, p1 

    This paper documents the testing of Barre granite specimens for fracture toughness under mode I, along two different directions with respect to microstructural fabrics. The morphology of cracks was measured by applying a 3D Objects Counter plug-in technique on micro Computed Tomography (CT)...

  • Anisotropic damage in composite shell structures. Pavan, Roberto C.; Creus, Guillermo J. // Latin American Journal of Solids & Structures;Sep2006, Vol. 3 Issue 3, p263 

    Continuum Damage Mechanics (CDM) had important developments since the initial works of Kachanov and Rabotnov, and constitutes now a practical tool to account for macrocospic damage in materials and structures. In this work, an application of the anisotropic damage theory based in Murakami work...

  • An Endochronic Damage Model for Three-Dimensional Ductile Failure Analysis of Double-Edge Notched Thick-Tension Specimens. Chow, C L; Chen, X F // Proceedings of the Institution of Mechanical Engineers -- Part C;1998, Vol. 212 Issue 1, p25 

    A three-dimensional ductile damage model based on the endochronic plastic theory is developed and employed to characterize the failure process of double-edge notched thick-tension specimens. A ductile damage evolution equation is derived with a new intrinsic time-scale specifically defined to...

  • Creep failure of a simply supported beam through a uniaxial Continuum Damage Mechanics model. Challamel, N.; Lanos, C.; Casandjian, C. // Acta Mechanica;Jul2007, Vol. 192 Issue 1-4, p213 

    Creep failure of elastic-damageable beams is investigated using a simple Continuum Damage Mechanics model. A single-degree-of-freedom system is first studied for the bending problem of the visco-damage spring. The strong analogy between the behavior of such a system and the one of an...

  • The Application of Peridynamic Method on Prediction of Viscoelastic Materials Behaviour. Nikabdullah, N.; Azizi, M. A.; Alebrahim, R.; Singh, S. S. K.; Elwaleed, A. K. // AIP Conference Proceedings;2014, Vol. 1602, p357 

    This paper presents an application of the peridynamic method to predict a viscoelastic behavior. The peridynamic theory is a nonlocal continuum theory that shows an inherent crack initiation and crack growth criterion when it is applied on elastic material. This method is developed in order to...

  • Conceptual thoughts on continuum damage mechanics for shallow ice shelves. KELLER, Arne; HUTTER, Kolumban // Journal of Glaciology;2014, Vol. 60 Issue 222, p685 

    We consider a theory for shallow ice shelves that includes an isotropic damage variable. A zeroth-order shallow-shelf approximation allows a simple yet consistent treatment of both ice dynamics and damage evolution. We find that the damage variable (like temperature) has, in general, to vary...

  • Air voids reduction phenomena of asphalt concrete — A continuum approach. Krishnan, J.; Rengaraju, V.R. // International Journal of Fracture;Apr1999, Vol. 97 Issue 1-4, p337 

    phalt concrete used in flexible highway pavement construction has 5–8 percent air voids immediately after laying of the roadway. Constitutive laws for asphalt concrete developed till now have modelled the mix as a linear elastic or viscoelastic material and have not taken into account the...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics