What is the difference among effective plastic strain, equivalent plastic strain and accumulated plastic strain?

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Eugene V. Kuznetsow Popular answer

In a nutshell:

The value of equivalent strain allows to characterize at the measurement moment the structural state of the material that was formed as a result of the previous loading.

The value of effective plastic strain is the integral of stepwise increments of plastic deformation for a period of time t .(http://www.math.spbu.ru/diffjournal/pdf/lobanov.pdf, p. 22, formula 8).

The concept of the accumulated strain is widely used as a parameter of changes of the mechanical characteristics of material at deformation hardening or softening and, sometimes, as a failure criterion at low cycle fatigue. It only makes sense at alternating loading (http://www.unn.ru/pages/e-library/ppp/2011_73/16.pdf).

Unfortunately, speedily I can to suggest only links to articles in Russian...

http://www.math.spbu.ru/diffjournal/pdf/lobanov.pdf

http://www.unn.ru/pages/e-library/ppp/2011_73/16.pdf

Eugene V. Kuznetsow

J. Veerababu

Thank you so much Eugene V. Kuznetsow

Aditya Narayan Singh

Nice Explanation Sir.

Nakka Rake

Thank you for explaining