This practice provides instructions for modifying the long beam flexure test method to determine the residual strength properties of sandwich constructions that have been subjected to quasi-static indentation or drop-weight impact testing.
Keywordssandwich composite; sandwich construction; damage tolerance; residual strength, impact damage
The proposed standard practice consists of subjecting a damaged long beam of sandwich construction to a bending moment normal to the plane of the sandwich, using a 4-point loading fixture in accordance with the D7249 test method. The practice provides supplemental instructions that allow the use of D7249 to determine residual strength properties of damaged sandwich constructions. Susceptibility to damage from concentrated out-of-plane forces is one of the major design concerns of many structures made using sandwich constructions. Knowledge of the residual strength properties of a sandwich panel is commonly used in material selection product development, research and development activities, and establishing design allowables.
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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