The Optimization Of Polymer Cladding Material Ratio From Metal Matrix Composites And The Study On Properties Of Damping

On the basis of previous research on metal matrix composites, the paper proposes a kind of well damping and firmly metallic plastic composites .The composites is composed of polymer cladding material and metal matrix. The ratio of polymer cladding material is optimized by means of GA and the optimal proportion is achieved. Optimal proportion is tested by means of modal test and cutting test. The main content and the results of paper reflect in the following aspects:Firstly, performance of metallic plastic composites is analyzed deeply and its parameters are determined. Uniform design and theory of experimental modal analysis are elaborated. The feasibility of genetic algorithm optimization is elaborated. The uniform design including two indexes and multi-factor is established when volume percentage of each component in polymer cladding material is used as factor and damping ratio and bonding strength of metal matrix composites is used as target. The bonding strength and damping ratio of metallic plastic composites under the different ratio are achieved through the corresponding test.Secondly, objective function of the ratio of polymer cladding material and performance of metallic plastic composites is constructed .The cycle end condition, population size, crossover probability, mutation Probability of GA have been defined. The program of GA is run and optimal proportion, bonding strength, damping ratio have been defined through selection, cross, replication, etc. The bonding strength test and damping ratio test are carried out after optimal metallic plastic composites is manufactured .The results are compared with un-optimized one. It shows that the result is reasonable when the superiority is obviously and the prediction of GA is comparatively accurate. Otherwise, the tests should be arranged and the optimization should be carried out again.At last, a kind of damping diamond cutting blade is manufactured based on optimization results and the experimental modal analysis is executed. The damping diamond cutting blade is compared with common one in natural frequency, damping ratio, vibration mode, etc.The end error of two kinds of diamond cutting blade are compared through practical cutting test. The research shows that the comprehensive level about bonding strength and damping ratio of optimal metallic plastic composites are well than the level from uniform design. The theoretical value from GA is accurate by comparison of real performance of metallic plastic composites. The modal test and practical cutting test show that the low frequency natural frequency of damping diamond cutting blade decreases significantly and damping ratio significantly increases. The end error dramatically reduce with decrease of vibration strength of damping diamond cutting blade . The optimization result is obviously.