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Why is the packaging steel strip deformed?
by：Hongmei
2021-03-15
Why is the packaging steel strip deformed?
To analyze the deformation of the steel strip, we must first talk about the internal stress of the steel strip. The internal stress of the steel strip refers to the stress of the interaction between different structures in the steel strip, even the steel strip that looks straight to the naked eye, especially the steel strip with a good plate shape under tension or after coiling. There are more or less internal stresses. Obviously, for a material with better plasticity, it is easy to deform under the same stress and there is a small residual stress, while for a material with a higher strength, it is difficult to deform and the residual stress is larger. If the internal stress is large enough to cause the steel belt to deform, the steel belt will be deformed.
The problems of deformation and internal stress of steel strips can be discussed in two cases. One is that the unevenness of the upper and lower parts of the steel strip in the thickness direction is not considered, and only the wave shape and tensile stress in the length direction are analyzed. ; Another case is to consider the unevenness of the upper and lower parts of the steel strip in the thickness direction, and analyze the bending and bending stress in the thickness direction.
To analyze the deformation of the steel strip, we must first talk about the internal stress of the steel strip. The internal stress of the steel strip refers to the stress of the interaction between different structures in the steel strip, even the steel strip that looks straight to the naked eye, especially the steel strip with a good plate shape under tension or after coiling. There are more or less internal stresses. Obviously, for a material with better plasticity, it is easy to deform under the same stress and there is a small residual stress, while for a material with a higher strength, it is difficult to deform and the residual stress is larger. If the internal stress is large enough to cause the steel belt to deform, the steel belt will be deformed.
The problems of deformation and internal stress of steel strips can be discussed in two cases. One is that the unevenness of the upper and lower parts of the steel strip in the thickness direction is not considered, and only the wave shape and tensile stress in the length direction are analyzed. ; Another case is to consider the unevenness of the upper and lower parts of the steel strip in the thickness direction, and analyze the bending and bending stress in the thickness direction.
