HeXie Feed Technology & Aqua Feed Manufacturing Aquatic Feed Production Line,Feed Production Line,Aquatic Feed Mill XinxiangHexie Feed Machienry Manufacturing Co.Ltd , https://www.hxfeedmill.com
Aquatic feeds have very high requirements in terms of both nutritional and physical characteristics of feed. These nutritional and physical feed requirements are driven by the life stage of a speciï¬c species under consideration. Physical characteristics include issues such as pellet size and shape; pellet density allowing us to produce floating, slow sinking and sinking feeds; water stability and pellet durability. The challenge is to achieve all of these while having a negligible effect on the environment.
What is the elasticity, plasticity, and brittleness of rock?
When cylindrical and spherical isobaric heads are pressed into rocks of different properties, three different forms of pressure-push-in depth (p-h) curves may appear, as shown in Figure 1.
Fig.1 Schematic diagram of pressure-pressure relationship of cylindrical indenter pressed into rock
(α) brittle rock; (b) plastic brittle rock; (c) plastic rock
Each curve has an approximate linear phase. At this stage, the indentation depth increases proportionally with the increase of pressure. After the pressure is released, the rock will return to its original shape and volume without any residual deformation. This property is called elasticity. .
After the rock is unloaded, the ability to retain partial deformation is called plasticity.
Before the destruction, there is basically only the rock in the straight line stage, or the force state reaches a certain limit degree, and then the violent destruction occurs very quickly. This property is called brittleness.