1.1 This test method covers determination of apparent in-plane shear strength and stiffness properties of flat sandwich constructions. Permissible core material forms include those with continuous bonding surfaces (such as balsa wood and foams) as well as those with discontinuous bonding surfaces (such as honeycomb). 1.2 The square test specimen with corner notches is mechanically fastened to a pinned metal frame along each edge. The frame is loaded in axial tension, which produces tensile forces in the frame elements at a 45 angle to the applied tension. These tensile forces act along the edges of the specimen to cause a state of predominate shear stress to transfer the applied force through the specimen. Procedure A uses a specimen without edge doublers, Procedure B uses a specimen with four discrete edge doublers, and Procedure C uses a specimen with a continuous edge doubler. 1.3 Units--The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.3.1 Within the text, the inch-pound units are shown in brackets. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Versions of this test method are used in aerospace industry for design property development and quality control.
Keywordsshear stress; facing modulus; facing stress; facing strength; shear stiffness; sandwich construction
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top