Checking strength calculation formula

Calculation formula of checking strength: Sfcu=[(∑ fcu? i2-n？ mfcu2)/(n- 1)] 1/2 .

How to check the stability and calculation strength of furniture;

Stability check and strength calculation of furniture: stability refers to the performance of the object to keep its position all the time, and strength refers to the performance of the object to resist any external force that may cause damage, bending and inclination. The traditional design concept is to stabilize the furniture by strengthening the leg material; The idea of modern design is to check the stability of furniture and calculate the strength of furniture.

The load of furniture can be divided into two categories: dead load and live load. Dead load is the weight of furniture itself, which can be calculated after the size and material of furniture parts are determined. Live load is the weight of people or things that may appear on furniture, which can be calculated according to the use function of furniture. Live load is directional, impulsive and instantaneous, which can cause sliding or overturning, and should be considered in the strength calculation of furniture design.

The stability check of furniture mainly considers the stability of furniture under vertical external force and lateral thrust. The stability condition is that MO (overturning moment) is less than MR (overturning moment); The strength calculation of furniture mainly considers the strength of parts and the bonding strength between parts.

The strength of parts depends on the material properties, material size and cross-sectional shape of parts, and the joint strength depends on the joint mode and material properties. Through stability check and strength calculation, the designed furniture structure can be reasonable and firm, and the selected materials and cross-sectional dimensions can meet the use requirements, so as to avoid blindly increasing strength and selecting large materials, resulting in waste.