One possible regularization technique is based on the integral definition of nonlocal
cumulated plastic strain
 |
(48) |
The nonlocal weight function is usually defined as
 |
(49) |
where
 |
(50) |
is a nonnegative function, for
monotonically decreasing with increasing distance
, and
denotes the domain occupied by the investigated material body.
The key idea is that the damage evolution at a certain point depends not only on the cumulated plastic strain at that point, but also on points at distances smaller than the interaction radius
, considered as a new material parameter.
Borek Patzak
2019-03-19