03-14-2018, 03:36 PM
Sorry for having been too brief! 
Under scaling effects I have meant effects which occur when we scale down from macroscopic scale to microscale. At microscale the thin metallic material (e.g. a burr) cannot be regarded as homogeneous because it is composed of grains, the size of which may be comparable with the thickness of the material. This leads to change in thin sheet metal behaviour.
The paper I have read claimed, that the decisive parameter for occurrence of scaling effects is the ratio of mean grain size to the foil thickness. Grains located at metal surface behave differently than the internal grains.
Jan
Under scaling effects I have meant effects which occur when we scale down from macroscopic scale to microscale. At microscale the thin metallic material (e.g. a burr) cannot be regarded as homogeneous because it is composed of grains, the size of which may be comparable with the thickness of the material. This leads to change in thin sheet metal behaviour.
The paper I have read claimed, that the decisive parameter for occurrence of scaling effects is the ratio of mean grain size to the foil thickness. Grains located at metal surface behave differently than the internal grains.
Jan