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Equivalent strain in simple shear of metals
We show that simple shear and pure shear form two groups of transformations with different properties. The equivalent strain is viewed as an external control parameter of the deformation process at low homologous temperatures. The von Mises strain satisfies group-theoretic properties of both groups,...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Донецький фізико-технічний інститут ім. О.О. Галкіна НАН України
2015
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| Series: | Физика и техника высоких давлений |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/107388 |
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| Summary: | We show that simple shear and pure shear form two groups of transformations with different properties. The equivalent strain is viewed as an external control parameter of the deformation process at low homologous temperatures. The von Mises strain satisfies group-theoretic properties of both groups, supporting its use for measuring the equivalent strain. On the other hand, the Hencky strain does not satisfy the simple shear group properties, implying that it is not appropriate for measuring the equivalent strain in simple shear. The paper also proposes a hypothesis explaining the absence of metal hardening in large simple shear deformations. This hypothesis explains why excluding rotations as prescribed by the finite strain theory is not valid. |
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