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A mechanical model for the elastic–plastic behavior of metallic bars

✍ Scribed by Maurizio Froli; Gianni Royer-Carfagni

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
743 KB
Volume
37
Category
Article
ISSN
0020-7683

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✦ Synopsis

A simple mechanical model, which consists of a particular assemblage of elementary units composed of elastic springs and frictional sliding blocks, appears suitable for describing the various aspects of the elastic±plastic behavior of steel bars in standard tensile tests: oscillations in the average stress±strain curve, the distinction between local and global responses, instability due to the transition from an upper to a lower yield point, the spread of plastic deformation, strain-hardening behavior, elastic unloading and the in¯uence of loading-device stiness.

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A 3-D elastic-plastic dynamic finite element model for the generation of incident pulse in the rotating disk indirect bar-bar tensile impact apparatus is established in the present paper. The numerical simulation is solved by ANSYS/LSDYNA. The numerical result thus obtained is in good agreement with