Sandwich Flexural Stiffness

  

Vinod Kumar
Published : June 5, 2023

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Sandwich Flexural Stiffness

Sandwich structures are made up of two thin and strong outer layers, referred to as the facings, separated by a core material. The core material may be made of lightweight materials such as foam, balsa wood, or honeycomb. Sandwich structures have found extensive applications in various industries such as aerospace, marine, automotive, and civil engineering due to their excellent mechanical properties, including high stiffness, strength, and lightweight.

One of the critical mechanical properties of sandwich structures is flexural stiffness, which is the ability of the sandwich structure to resist bending when subjected to an external load. Flexural stiffness plays a vital role in the structural design of sandwich structures, and it influences their overall mechanical performance. To determine the flexural stiffness of sandwich structures, a testing method called sandwich flexural stiffness testing is used.

The sandwich flexural stiffness testing involves placing a sandwich panel on two supports separated by a specified distance. The sandwich panel is subjected to a load applied at its center. The deflection of the sandwich panel is then measured, and the flexural stiffness is calculated as the ratio of the load to the deflection.

The flexural stiffness of sandwich structures is affected by various factors such as the thickness and properties of the facings and the core material, the geometry of the sandwich structure, and the type of loading. Therefore, it is essential to carefully design the sandwich structure to achieve the desired flexural stiffness.

Video 01: Flexural Stiffness of a composite sandwich

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