Corrugated cardboard box anti-pressure resistance formula application case analysis one (2)

The change of force during the compressive test is sometimes from slow to rapid, directly to the point of collapse, and it is gradually increasing to the point of collapse. During the long-term compressive test, the change of force during the compression test of the carton is sometimes found. With a certain buffer, after the force and deformation increase to a certain level, the force value stops and the deformation continues to increase. After a period of time, the force value continues to increase until the carton breaks. We can call the force value before buffering as the effective force value, and the deformation amount before buffering is the effective deformation amount. After buffering, although the force value can continue to increase, the carton begins to deform and can no longer meet the requirements for the use of the carton itself. Under the same conditions, the better the quality of the carton, the higher the effective value of the compressive strength and the smaller the deviation between the effective value and the final value. Analysis of the compressive strength of corrugated boxes is generally expressed by the average value of a set of multiple experiments (≥3), and the smaller the deviation between each experimental data is, the more stable the compression resistance of the carton is. We can analyze the intrinsic quality of the carton through the process of changing the force and deformation, so as to further analyze the various factors that affect the pressure resistance of the carton.

Recorded on the right are several typical compression test procedures and the resulting change curves. The 1-4 groups are the test cases where the carton perimeter and rake shape are the same, but the compressive strength is obtained after different materials; B, C, A are the same as the carton and the perimeter of the carton, but the selected crowing shape is different. Strength test conditions. (See Table 1)

(to be continued)