Aluminum honeycomb panels have become a popular building material among honeycomb panel products. Known for their excellent material selection and manufacturing process, these panels not only excel in strength and flatness but also offer a wide range of color and smooth surface options. After years of development, they have flown into thousands of households.
The following will focus on briefly describing the equivalent flexural section modulus (We) and equivalent flexural stiffness (De) of aluminum honeycomb panels.
The calculation formula for the bending section large stress design value of aluminum honeycomb panels is:
　　σ=(mqL2/W)η≤fa…………………………………………………………(1)
In Equation (1), σ—the normal stress on the surface (N/mm2).
The bending moment coefficient, denoted as m, can be obtained from relevant tables and is related to the ratio of the short side to the long side of the plate area.
q – Load perpendicular to the surface (N/mm²)
L—short edge length of the L-shaped grid (mm)
We—the equivalent bending section coefficient (mm³/mm)
The reduction coefficient η, which can be obtained from relevant tables, is related to the parameter θ (the ratio of deflection to thickness).
fa — Aluminum Honeycomb Panel Strength Design Value
It can be easily observed from Equation (1) that the equivalent bending section coefficient, We, is inversely proportional to the maximum normal stress, σ, on the plate surface. This means that when the plate area and the load perpendicular to the plate surface are concerned, a higher We corresponds to a lower σ, making the plate more rigid. In other words, under the condition that the maximum normal stress on the plate surface does not exceed the design strength of the panel, fa, and the plate area remains the same, an aluminum honeycomb panel with a higher We can withstand a greater load perpendicular to the plate surface. Alternatively, with a higher We, the aluminum honeycomb panel can be designed with a larger plate area (i.e., reduced reinforcing ribs), saving material and labor costs.
The calculation formula for the large deflection of aluminum honeycomb panels under wind load is:
　　df=(μWKL4/De)η…………………………………………………………(2)
In Equation (2), df—maximum deflection (mm) under wind load.
μ—the deflection coefficient, which can be obtained from relevant tables, is related to the ratio of the short side to the long side of the plate area.
WK – Wind Load Perpendicular to the Surface (N/mm²)
De — Equivalent bending stiffness (Nmm²/mm)
The meanings of the remaining symbols are the same as in Equation (1).
From Equation (2), it can be deduced that the equivalent bending stiffness De is inversely proportional to the maximum deflection df under wind load, meaning that when the panel area and wind load perpendicular to the panel surface are present, a higher De results in a smaller df, indicating less bending deformation of the plate. Alternatively, under the same panel area and deflection, a larger De in aluminum honeycomb panels can withstand greater wind loads. Furthermore, with a higher De in aluminum honeycomb panels, the panel area can be designed larger (i.e., with fewer reinforcing ribs), thereby saving material and labor costs.