Four points are extracted from the sample, and the amount of misalignment is obtained by a certain algorithm. At the same time, the included angle of the reticle after bending is obtained. Four points are taken on the four surfaces of the two steel plates, and two points are connected on each layer of the steel plate. Vertical plate, each plate makes up a straight line. At the beginning, the two lines coincide and the steel plate is shifted after bending. The two lines are separated. Since the bending radii of the two steel plates are different, the two lines are also angled and data are drawn. The analysis shows that the fluctuation of the angle between the scribe lines is a direct manifestation of the uneven deformation of the steel plate and the resin. The influence of the plate thickness on the misalignment has a large amount of misalignment in the bending of a resin composite steel plate with equal thickness, resulting in a large residual stress in the sandwich and the phenomenon of reverse bending. In the simulation, under the condition of the same bending radius and intermediate resin thickness, the thickness of two steel plates was changed to study the distribution of the amount of misalignment. It can be seen that as the thickness of the resin increases, the amount of misalignment gradually increases. This is due to the increase in the thickness of the resin, which can buffer the difference in stress and strain between the inner and outer plates. However, the intermediate resin generates a large strain, which means that the resin composite plate has a large amount of misalignment. In addition, it can also be seen that the change in the amount of misalignment gradually decreases with the same resin thickness variation. This is because as the resin thickness increases, the proportion of the resin increases, the resin has a large elasticity, and rebound occurs, and the degree of increase in the amount of misalignment gradually decreases. It can be seen that the amount of misalignment of the outer thick inner plate is significantly higher than that of the other two plates, while the outer thin inner plate has the lowest misalignment amount. This is due to the fact that when the specimen is bent, the ratio of the external tensile stress is greater than the internal compressive stress. When the outer plate thickness, the outer plate is not easily deformed, the inner plate is easy to deform, so that the internal resin has a greater stress, further resulting in a larger strain, that is, a larger amount of misalignment. However, when the outer thin inner thickness is thick, the outer thin plate is easily deformed, and the inner thick plate is not easily deformed, so that the amount of misalignment is eased. Therefore, the use of external thin thickness damper plate can improve the bending performance of the plate. As the bending radius increases, the position of the maximum misalignment increases. This is because the increase in the bending radius affects the distribution of the deformation amount in the longitudinal direction of the sheet, resulting in a change in the position where the maximum amount of misalignment occurs. The increase of the bending radius outwardly expands the deformation of the punch, that is, the position of the maximum amount of misalignment gradually deviates from the centerline of bending. The change rule of the position of the maximum displacement of the plate with different specifications is different. The position of the maximum displacement of the plate is located closest to the bending center, and the thick plate with the outer thin thickness is farthest from the bending center. This is caused by the influence of the amount of misalignment and the location of the maximum misalignment. The difference in the amount of deformation caused by the bending radius is different. The amount of deformation of the two-tiered steel plate affects the amount of misalignment, and the friction and constrains affect the amount of misalignment. Different distributions. In addition, the influence of the thickness of the resin on the position of the maximum displacement of the same bending radius and the same bending radius of the plate was studied. The position of the maximum misalignment gradually deviates from the center as the resin thickness increases. This conclusion is consistent with the law of variation of the maximum amount of misalignment. The increase in the maximum misalignment increases the amount of deformation of the sheet at the punch and causes the stress and strain to expand outward. Thicker resin makes this expansion easier, so as the thickness of the resin increases, the position of the maximum offset gradually deviates from the centerline. “Gull wing†angle analysis of resin composite vibration-damping plate When the resin composite steel plate is bent in a crooked shape, the shear stress deformation of the resin occurs due to the bending deformation, and this shear stress deformation is eliminated inside the end, so that it should be The straight end of the imperial crown showed a "gull-wing"-like flexing phenomenon, as shown by Îœ. The degree of increase in the angle of curvature gradually decreases. This result is consistent with the previous analysis of the amount of misalignment as the result of the gradual decrease in resin thickness. It can also be obtained through simulation that under the same bending angle, as the thickness of the resin increases, the bending angle also increases, and the degree of increase gradually decreases. When the plate thickness is the same, there are two factors that determine the degree of reverse bending, residual stress, and resin thickness and characteristics. Therefore, as the thickness of the resin increases, the rebound increases, resulting in an increase in the bending angle. At the same time, due to the influence of the residual stress caused by the amount of misalignment: the amount of misalignment increases, the residual stress decreases, and the leading force of reverse bending decreases.) As the thickness of the resin increases, it decreases. The effect of thick resin thickness variation on the equivalent stress can be seen in the vicinity of the centerline, due to the influence of the bending radius, the smaller the thickness of the resin, the easier the bending deformation, the greater the deformation, so the greater the stress and strain. In the case of a certain resin thickness, the amount of strain determines the amount of misalignment. When the resin thickness changes, the main strain of the resin is different, and it will inevitably affect the equivalent strain of the resin. As the thickness of the resin increases, the compressive strain in the direction of the plate thickness is very large. This compressive strain counteracts the shear strain and the equivalent strain of the combined effect decreases. This effect is very prominent within 0 è· from the centerline. Since there is no constraint outside 04, the compressive strain gradually weakens. Therefore, besides being greater than 24, with the influence of springback, the strain gradually increases as the resin thickness increases.
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