Abstract
Thanks to the geometric and material complexity of additive manufacturing, the design space of mechanical parts has been developed, in which lattice filling structure customization can be applied to the solid filling of mechanical parts to achieve the goal of mechanical structure lightweight. A kind of diamond lattice structure unit is designed by imitating the natural method based on Design for Additive Manufacturing of mechanical parts. The mathematical model of the relative density and mechanical properties of the unit are established, and the relationship between the two is obtained, which is verified by simulations; then the relatively uniform results are obtained. The variable density hypothesis of diamond lattice structure is proposed, the methods of simulations and compression tests are used to verify the hypothesis, and the results show that the variable density structure with the density of the filling element decreasing gradually with the stress point as the center has better compression performance and concurrently verify the correctness and applicability of the equivalent modulus of elasticity mathematical model. The results of this study can be applied to the solid sandwich filling of pressure mechanical parts, and the stress density matching relationship can be carried out to further specific design.
Highlights
The Diamond Lattice StructureReceived 15 September 2020; Revised 18 December 2020; Accepted 31 December 2020; Published 16 January 2021
Academic Editor: Carlo Santulli anks to the geometric and material complexity of additive manufacturing, the design space of mechanical parts has been developed, in which lattice filling structure customization can be applied to the solid filling of mechanical parts to achieve the goal of mechanical structure lightweight
Ø l h system for the complete cylindrical rod, by which calculating the volume of the equivalent rod shown in Figure 5(c), and establishes a mathematical model for the relative density of lattice diamond lattice structure unit (DLSU) with ordinary nodes
Summary
Received 15 September 2020; Revised 18 December 2020; Accepted 31 December 2020; Published 16 January 2021. Anks to the geometric and material complexity of additive manufacturing, the design space of mechanical parts has been developed, in which lattice filling structure customization can be applied to the solid filling of mechanical parts to achieve the goal of mechanical structure lightweight. A kind of diamond lattice structure unit is designed by imitating the natural method based on Design for Additive Manufacturing of mechanical parts. E variable density hypothesis of diamond lattice structure is proposed, the methods of simulations and compression tests are used to verify the hypothesis, and the results show that the variable density structure with the density of the filling element decreasing gradually with the stress point as the center has better compression performance and concurrently verify the correctness and applicability of the equivalent modulus of elasticity mathematical model. E results of this study can be applied to the solid sandwich filling of pressure mechanical parts, and the stress density matching relationship can be carried out to further specific design. Lattice structure is a kind of periodically connected space filling element, which is usually created by truss structure and minimalist surface [4], which has the advantages of saving materials, reducing energy use, and saving time, and has high energy absorption rate, high-strength weight ratio, and thermal management ability. e lattice structure has not been widely used in the past due to the limitation of processing methods, and the rise of additive
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