Mechanical performance of lattice structure units and its application in lightweight design of structures
Aiming at the problem of designing a specific function of the lattice structure to achieve structural lightweight design,the configuration of lattice structure element was innovated by the method of topology optimization.Firstly,starting from the characteristics of actual load conditions,the initial design model was constructed,the topological optimization idea was used to innovate the lattice structure element spectrum that conformed to the mechanical properties.The mechanical performance of the lattice structure units was obtained through finite element analysis,and a unit performance evaluation method based on specific stiffness was proposed,the law of the mechanical properties of the lattice structure was obtained.Then,a typical lattice structure element proportion specimens was constructed,and the mechanical experimental analysis was carried out.The accuracy of the lattice structure element performance was verified by comparing the experimental data.Finally,the lattice structure performance law was applied to the lightweight design of automobile engine connecting rod structure.By analyzing the load characteristics of the connecting rod of the automobile engine,the lattice structure element spectra were matched,and the corresponding lattice structures were filled.The research results show that the volume of the filled connecting rod is reduced by 45%,while the specific stiffness is improved by 90%,the effectiveness and practicability of the lattice structure unit database are verified.The database of lattice structural elements established in this study can provide a powerful scientific basis for structural lightweight design of complex parts.
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