HEMP 3D-A Finite Difference Program for Calculating Elastic-Plastic Flow

1993 ◽  
Author(s):  
Mark L. Wilkins
Keyword(s):  
Finite Difference ◽  
Plastic Flow ◽  
Elastic Plastic

Study on Taylor Criterion for Complete Fracture of the Casing Packed with High Explosive

1983 ◽  
Vol 22 ◽  
Author(s):  
Chen Danian ◽  
Wang Desheng
Keyword(s):  
Finite Difference ◽  
Plastic Flow ◽  
High Explosive ◽  
Stress Waves ◽  
Clear Understanding ◽  
Fragmentation Mechanism ◽  
Elastic Plastic ◽  
Complete Fracture ◽  
Difference Calculation

ABSTRACTThe criterion for complete fracture of the casing by detonation of packed high explosive was first presented by G.I.Taylor. Thereafter Taylor criterion has been reviewed and extended by many authors. This paper is intended to present a clear understanding of the fragmentation mechanism, and to study the influence of stress waves on the fracture of the casing using finite difference calculation of elastic-plastic flow. The results show that Taylor criterion is correct to a certain extent.

Studies of Elastic-Plastic Instabilities

1999 ◽  
Vol 66 (1) ◽  
pp. 3-9 ◽  
Author(s):  
V. Tvergaard
Keyword(s):  
Shear Band ◽  
Plastic Flow ◽  
Continuum Mechanics ◽  
Shear Band Formation ◽  
Band Formation ◽  
Elastic Plastic ◽  
Localized Necking ◽  
Focus On Results ◽  
Metal Sheets ◽  
Bifurcation Behavior

Analyses of plastic instabilities are reviewed, with focus on results in structural mechanics as well as continuum mechanics. First the basic theories for bifurcation and post-bifurcation behavior are briefly presented. Then, localization of plastic flow is discussed, including shear band formation in solids, localized necking in biaxially stretched metal sheets, and the analogous phenomenon of buckling localization in structures. Also some recent results for cavitation instabilities in elastic-plastic solids are reviewed.

scholarly journals Температурная зависимость автоволнового механизма пластического течения

2020 ◽  
Vol 46 (24) ◽  
pp. 41
Author(s):  
Л.Б. Зуев ◽  
С.В. Колосов ◽  
С.А. Баранникова ◽  
А.М. Никонова
Keyword(s):  
Debye Temperature ◽  
Plastic Flow ◽  
Temperature Range ◽  
Elastic Plastic

The behavior of the localized plastic flow autowaves characteristics is considered in the Fe-Ni-Cr alloy for the temperature range from 143 K to 420 K (420 K is the Debye temperature). It is shown that the multiplication of the autowave length and the velocity of its propagation, in the specified interval, decreases with temperature. At the same time, the ratio of this value to the viscosity of the phonon gas in the metal in the investigated temperature range remains practically constant. This indicates that the elastic-plastic invariant of deformation is independent of temperature.

scholarly journals A note on elastic-plastic flow

1970 ◽  
Vol 28 (3) ◽  
pp. 454-457
Author(s):  
H. T. Danyluk ◽  
J. R. Pounder ◽  
J. B. Haddow
Keyword(s):  
Plastic Flow ◽  
Elastic Plastic

scholarly journals Finite Difference Solution of Elastic-Plastic Thin Rotating Annular Disk with Exponentially Variable Thickness and Exponentially Variable Density

2013 ◽  
Vol 2013 ◽  
pp. 1-9
Author(s):  
Sanjeev Sharma ◽  
Yadav Sanehlata
Keyword(s):  
Finite Difference ◽  
Variable Thickness ◽  
Yield Criterion ◽  
Variable Density ◽  
Hardening Material ◽  
Annular Disk ◽  
Elastic Plastic ◽  
Flat Disk ◽  
Finite Difference Solution ◽  
Von Mises

Elastic-plastic stresses, strains, and displacements have been obtained for a thin rotating annular disk with exponentially variable thickness and exponentially variable density with nonlinear strain hardening material by finite difference method using Von-Mises' yield criterion. Results have been computed numerically and depicted graphically. From the numerical results, it can be concluded that disk whose thickness decreases radially and density increases radially is on the safer side of design as compared to the disk with exponentially varying thickness and exponentially varying density as well as to flat disk.

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