GOST R 56791-2023 PDF

Scope: This standard applies to the core materials of sandwich structures made from polymer composites and establishes a method for determining the shear strength characteristics of the core materials of sandwich structures by beam bending testing. The method is applicable for materials of the inner layer of “sandwich” structures with a continuous bonding surface (for example, balsa wood and foam plastics), as well as with an intermittent bonding surface (for example, honeycomb structures)

GOST R 56791-2023 history

2023 GOST R 56791-2023 Polymer composites. Determination of shear strength characteristics of sandwich core materials by beam flexure test
2015 GOST R 56791-2015 Polymer composites. Determination of mechanical characteristics of shear of the inner layer of sandwich constructions by beam flexure