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International Journal of Forming Processes
1292-7775
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 ARTICLE VOL 5/2-3-4 - 2002  - pp.351-362  - doi:10.3166/ijfp.5.351-362
TITLE
Mathematical Modeling of Dynamic Processes of Irreversible Deforming, Micro- and Macrofracture of Solids and Structures

ABSTRACT
Thermomechanical processes, which proceed in deformable solids under intensive dynamic loading, consist of mechanical, thermal and structural ones which correlate themselves. The structural processes involve the formation, motion and interaction of defects in metallic crystals, phase transitions, the breaking of bonds between molecules in polymers, the accumulation of microstructural damages (pores, cracks), etc. Irreversible deformations, zones of adiabatic shear and microfracture are caused by these processes. Dynamic fracture is a complicated multistage process including an appearance, evolution and confluence of microdefects and a formation of embryonic microcracks, pores their grow up to the break-up of a bodies with division into separate parts. The present paper include new results in the next scopes: 1) development the thermodynamically correct mathematical models of damageable thermoelastoviscoplastic medium (microfracture); 2) development the methods for determination of "nonstandart" constants of medium models, connected with microfracture of material; 3) numerical simulation of destruction (fragmentation) of constructions (macrofracture).


AUTEUR(S)
Alexey B. KISELEV, Alexander A. LUK'YANOV

KEYWORDS
Damage, fracture, destruction, irreversible deforming, thermoelastoviscoplasticity.

CITATIONS
ijfp.revuesonline.com/revues/5/citation/3443.html

LANGUE DE L'ARTICLE
Anglais

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