Local Interference Structure Of The Particulate Matter Study

According to the characters of granular media, a new filling procedure for granular media (stationary localized-source procedure) is put forward on the condition that the reproducibility can be realized. Using this procedure, the granular media is filled into cylinder. Then the detecting rod or tip are penetrated into granular media at the same speed along the direction parallel to axis of cylinder, after which the detecting rod or tip will move up and down in the granular media. By which perturbation is applied to the local area of granular media. The sensor detects the resistance force which the granular media applies on the detecting rod or tip. The main conclusions are as follows:1. The structure deformation while strong perturbation is applied matches the qualitative predictions of Reynolds' dilation theory.2. The force detected by the detecting rod is independent of the velocity of penetration.3. While other conditions are all fixed, the rules that the penetration resistance obeys are similar for the detecting rod with different cross section, especially for the initiation stage, the friction takes on qusi-linearity.4. The force that the detecting rod experienced is dependent of the diameter and cross section shape of the detecting rod, such as the cylinder rod,the quadrangular rod and the triangular rod. The general resistance equation for the rods with different cross section is similar; The cross section shape of detecting rod has no obvious effect on the rules that the resistance force obeys, but has obvious effects on value of the friction. Here we introduce a parameter: shape factor of the cross section. If the shape factor of cross section for cylinder rod is set as 1, which for other cross section is less than 1, at the same time, that for triangular rod is the smallest, while the cross section has the same perimeter.5. While other conditions are all fixed, the force that the detecting rodexperienced is inverse proportion to quadratic order of the granular diameter: F∝1/d~2,wherein d is diameter of granula.6. The penetration resistance equation for the rods areand...