Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/4308
Title: | Non-uniform deformation after prestrain | Authors: | Fernandes, José-Valdemar Menezes, Luis F. Rodrigues, Dulce M. Chaparro, Bruno M. Vieira, Manuel F. |
Keywords: | tensile deformation; plastic instability; complex strain paths | Issue Date: | 2000 | Citation: | European Journal of Mechanics - A/Solids. 19:2 (2000) 209-221 | Abstract: | The deformation behaviour of prestrained metal sheets is analysed in this work. The non-uniform deformation observed during reloading in tension was studied, by following deformation in different regions of the samples. It takes into account the presence of geometrical defects in the samples and explains the importance of mechanical behaviour. A simplified analysis was used, to model the behaviour in tension of a metallic specimen with geometrical imperfection. The flow behaviour is described using a Swift law equation, which includes strain-rate sensitivity. A modified law was used for prestrained materials and this incorporates the plastic prestrain value, adjusted to the path change. The model predicts imperfection growth kinetics with strain, and strain saturation in the homogeneous region, due to the onset of necking. | URI: | https://hdl.handle.net/10316/4308 | DOI: | 10.1016/S0997-7538(99)00146-1 | Rights: | openAccess |
Appears in Collections: | FCTUC Eng.Mecânica - Artigos em Revistas Internacionais |
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file7ae3484ecfd14fc1b2468743b53bb457.pdf | 301.45 kB | Adobe PDF | View/Open |
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