→Used in 3-point flexure or 4-point flexure test for determination of flexural and transverse shear stiffness properties of flat sandwich constructions.
→ASTM C393/C393M-20 Standard Test Method for Core Shear Properties of Sandwich Constructions by Beam Flexure
→ASTM D7249/D7249M-12 Standard Test Method for Face sheet Properties of Sandwich Constructions by Long Beam Flexure
→ASTM D7250/D7250M-06 Standard Practice for Determining Sandwich Beam Flexural and Shear Stiffness
For details, please check the following links: