Experimental And Simulation Research On Abrasive Wear Behavior Of Clam Surface Morphology

Title: Experimental and Simulation Research on Abrasive Wear Behavior of Clam Surface MorphologyProfession: Agricultural Mechanization EngineeringInstructor: Professor Li Jian-qiao, Associate Professor Zhang RuiThis thesis chooses Arca subcrenala Lischke and Arca inflata Reeve as the research objects. Both shells of Arca subcrenala Lischke and the shell of Arca inflata Reeve are tested respectively under three speeds (1.93m/s,2.35m/s,2.76m/s) and two types abrasive size (0.380-0.830mm,0.830-1.700mm)by making use of Abrasive tester. The result shows that the wear resistance of Arca subcrenala Lischke and Arca inflata Reeve is related to the abrasive size. When the relative moving speed is slow, the amount of mass abrasion for Arca subcrenala Lischke shell, Arca inflata Reeve shell and Arca inflata Reeve shell with hair becomes larger with the growth of the abrasive size. At the same time, the amount of mass abrasion for Arca subcrenala Lischke right shell is more than that of Arca subcrenala Lischke left shell and Arca inflata Reeve shell, and the amount of mass abrasion for Arca inflata Reeve shell with hair is the least.As the relative moving speed gets faster, the amount of mass abrasion for Arca subcrenala Lischke right shell becomes smaller with the growth of abrasive size. Besides, the amount of mass abrasion for Arca inflata Reeve shell and Arca inflata Reeve shell with hair becomes larger with the growth of abrasive size. And the amount of mass abrasion for Arca inflata Reeve shell is larger than that of Arca inflata Reeve shell with hair. The amount of mass abrasion for Arca subcrenala Lischke right shell is larger than that of Arca subcrenala Lischke left shell and Arca inflata Reeve shell when the abrasive size is smaller. And vise versa when the abrasive size is bigger. As the relative moving speed is the fastest, the amount of mass abrasion for Arca subcrenala Lischke right shell and Arca inflata Reeve shell becomes smaller with the growth of abrasive size. The amount of mass abrasion for Arca inflata Reeve shell with hair becomes larger with the growth of abrasive size. The amount of mass abrasion for Arca inflata Reeve shell is larger than that of Arca inflata Reeve shell with hair when the abrasive size is smaller. And vise versa when the abrasive size is bigger. At the same time, the abrasive wear behavior of Arca subcrenala Lischke shell and Arca inflata Reeve shell is related to the relative moving speed. On condition that the abrasive size is smaller, the amount of mass abrasion for Arca subcrenala Lischke shell and Arca inflata Reeve shell grows with the growth of relative moving speed. Besides, the amount of mass abrasion for Arca subcrenala Lischke right shell is larger than that of Arca subcrenala Lischke left shell and Arca inflata Reeve shell. On condition that the abrasive size is bigger, the amount of mass abrasion for Arca subcrenala Lischke left shell and Arca inflata Reeve shell becomes larger with the growth of abrasive size; the amount of mass abrasion for Arca subcrenala Lischke right shell becomes smaller with the growth of abrasive size. In a word, when the relative moving speed is lower, the amount of mass abrasion for Arca subcrenala Lischke right shell is larger than that of Arca subcrenala Lischke left shell and Arca inflata Reeve shell. when the relative moving speed is faster and the fastest, the amount of mass abrasion for Arca subcrenala Lischke right shell is smaller than that of Arca subcrenala Lischke left shell and Arca inflata Reeve shell.The thesis builds models of surface structures for both Arca subcrenala Lischke and Arca inflata Reeve with the help of PFC3D software under guidance of Discrete Element Method (DEM) theory. Besides, it makes experimental simulation of abrasive wear for both Arca subcrenala Lischke and Arca inflata Reeve models under three relative speeds and two types abrasive size. The simulation results show that once the abrasive size is decided, the amount of mass abrasion grows for both Arca subcrenala Lischke shell model and Arca inflata Reeve shell model with the growth of relative moving speed. Once the relative moving speed is decided, the amount of mass abrasion for both Arca subcrenala Lischke shell model and Arca inflata Reeve shell model grows with the growth of abrasive size. And the amount of mass abrasion for Arca subcrenala Lischke shell model is larger than that for Arca inflata Reeve model. The experimental and simulation results reveal that the using of PFC3D software simulation can help in designation and optimization of real tests.