Instrumented indentation for determining stress and strain levels of pre-strained DC01 sheets

In classical mechanical testing, determining the stress and strain states of complex shape specimens turns out to be very challenging, especially in most deformed regions. latter case, when not enough material is present, non-destructive testing needed for corresponding state. this study, a novel approach, based on local quasi-non-destructive instrumented indentation technique (IIT) coupled with inverse analysis (IAT), used determine levels pre-strained DC01 using monotonic non-monotonic loading paths. Monotonic cyclic shear tests as well Marciniak tests, both plane equi-biaxial states, are apply different pre-strain levels. For paths, i.e. shearing Marcianiak applied methodology showed satisfying results specimens, values close representative values. A maximum error less than 15% was obtained case highest value (29.04%). The purely isotropic Voce hardening law adopted behavior studied cases: as-received pre-strained. shear, mixed isotropic-kinematic specimens. Adopting Chaboche led where estimation errors yield didn't exceed 6% 1.3%, respectively. show that proposed indentation-based method can useful estimating work-hardening level plastic deformation parts under various paths