What is buckling instability? What is the application of studying buckling instability?

Buckling is a deformed state that looks like bending. Instability is a state of motion, and buckling is one of the main reasons for instability. The center of gravity shift is also the cause of instability. Generally speaking, the stiffness of a structure depends on the stiffness (elastic modulus), strength and size of the material. Materials with high stiffness and strength can generally be small, such as steel plates, steel columns and steel beams. But if it is too thin, it is easy to buckle. However, due to the stiffness and strength of the concrete material itself, the size of its members is large and buckling is unlikely to occur. It is mainly brittle fracture that causes chain reaction and leads to collapse. The concept of instability is relatively large, and those who lose stability are called instability. There are many reasons, including buckling.