Influence of relative density distribution rules on the mechanical compression responses of additive manufactured Ti6Al4V graded lattice structures

Abstract

To reveal the mapping mechanism between relative density distribution rules and compression responses of Graded lattice structures (GLSs), this work formed a series of lattice structures by establishing a theoretical model and adjusting distribution functions. To quantitatively describe the gradient variation rule, the degree of gradient (D_g) was introduced. Combined with quasi-static compression experiment and numerical simulation, compression responses of lattice structures were analyzed. The results demonstrated that relative density distribution rules could adjust the compression responses and achieved the transformation of the failure mode, and D_g was negatively related to the mechanical properties and the energy absorption capacity. Therefore, using relative density distribution rules can predict the overall performance and provide a reference for the novel graded lattice structural design.

Graphical Abstract

Keywords:

• Graded lattice structures
• Ti6Al4V
• selective laser melting
• compression response
• energy absorption

Disclosure statement

No conflict of interest exists in the submission of this manuscript, and the manuscript is approved by all authors for publication.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [Grant No. 51975070, 62003060, 62073211]. Natural Science Foundation of Chongqing [Grant No. cstc2021jcyj-msxmX0828]. Open Project of State Key Laboratory of Advanced Special Steel, Shanghai Key Laboratory of Advanced Ferrometallurgy, Shanghai University [Grant No. SKLASS 2019-26].