Compressive Properties of Functionally Graded Bionic Bamboo Lattice Structures Fabricated by FDM.

Zhou Wen,Ming Li

doi:10.3390/ma14164410

Abstract

Bionic design is considered a promising approach to improve the performance of lattice structures. In this work, bamboo-inspired cubic and honeycomb lattice structures with graded strut diameters were designed and manufactured by 3D printing. Uniform lattice structures were also designed and fabricated for comparison. Quasi-static compression tests were conducted on lattice structures, and the effects of the unit cell and structure on the mechanical properties, energy absorption and deformation mode were investigated. Results indicated that the new bionic bamboo structure showed similar mechanical properties and energy absorption capacity to the honeycomb structure but performed better than the cubic structure. Compared with the uniform lattice structures, the functionally graded lattice structures showed better performance in terms of initial peak strength, compressive modulus and energy absorption.

Highlights

Materials 2021, 14, 4410. https://Functionally graded materials (FGMs) have received extensive attention for application in various fields including aerospace [1,2,3], biomechanics [4,5] and energy absorption [6,7,8,9]
In contrast to traditional manufacturing methods, additive manufacturing (AM) has significant advantages in fabricating complex lattice structures, as it can overcome the limitations of traditional manufacturing methods by adding materials from a bottom-up, layer-by-layer approach [11]
By comparing the stress–strain curve of this sample with that of other cubic FGM structure samples in Figure 6b, the results showed the absence of a stress peak between the first peak and the third peak

Summary

Introduction

Graded materials (FGMs) have received extensive attention for application in various fields including aerospace [1,2,3], biomechanics [4,5] and energy absorption [6,7,8,9]. They can be characterized by their mechanical properties as the composition and structure gradually change over volume. For specific function and application, several traditional manufacturing methods have been employed to fabricate FGMs; these methods include plasma spraying, physical vapor deposition and powder metallurgy [10].

Methods

Discussion

Conclusion