The Structural And Functional Integration Design Of Elastic Damping Unit Based On 3D Printing

Since the 1970 s,with the rapid development of the technology such as the aerospace,high-speed delivery vehicles,missiles,atomic energy,weapons and equipment,the impact resistance performance of the material is looked forward higher requirements.3D printing,as a new additive manufacturing technology,shows a huge advantage on the manufacture of complex parts,and provides a new way of enhance the impact resistance performance of the parts.With the powerful free molding ability of3 D printing technology,some people printed some complex structures which have excellent impact resistance performance to the inside of the parts as units,then the impact resistance performance of parts has been greatly improved.But the current impact resistant structural units based on 3D printing mainly resist the impact load by plastic deformation,they have short service life and their applications has been greatly limited.For this situation,the paper proposed an elastic damping unit which can absorb a lot of energy in the elastic deformation stage,and studied the structural and functional integration design method based on the unit.Following specific contents were studied:1.Study an elastic damping unit which can absorb a lot of energy in the elastic deformation stage,design it's structural parameters and application layout.analyze the theoretical mechanical properties of the unit and discuss the influence of the unit structure parameters on its performance.2.Study the 3D print manufacturability of elastic damping units.Based on the Laser Selective Laser Melting(SLM)technique,analyze the manufacturability of the elastic damping unit,and discuss the unit structure parameter combination which meets the SLM process requirements.Based on the existing research,explore the optimal heat treatment scheme of TC4 parts manufactured by the equipment and process parameters in the paper by standard mechanics experiment.3.Study the performance of elastic damping units.Study the effects of different structural parameters such as cell width,transverse axis length and wall thickness on the bearing capacity and energy absorption capacity by compression test.Compare the performance of the elastic damping unit and the Kagome structure and discuss their differences in mechanical properties and energy absorption capacity.4.Build the elastic damping unit structure-performance database.Calculate the Young 's modulus,yield strength and energy absorption capacity of elastic damping elements with different structural parameters.Summarize the structural parameters,quality and other information,establish the elastic damping unit structure-performance database.5.Study the structural and functional integration design method based on the unit.According to the characteristics of SLM process,comprehensive theoretical analysisand finite element simulation,study the application of elastic damping unit and propose the structural and functional integration design method based on the unit.6.According to the design method,reconstruct the structure of a mortar base plate,and verify the strength of the reconstructed plate by finite element method.Manufacture reconstructed part of the base plate by SLM technology,and observe it's processing effect,verify the manufacturability of the structural and functional integration base plate.