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A Study on the Strength and Stiffness of Multi-Stage Cubic Truss Unit Structures

복합 입체형 정육면체 트러스 단위구조체의 강도 및 강성에 대한 해석 연구

Choi, Jeongho
최정호

  • Received : 2019.01.11
  • Accepted : 2019.04.20
  • Published : 2019.04.28

Abstract

This paper investigated the strength and stiffness of composite truss unit structures. The model used is a core-filled model combining the Kagome model and the cube truss model. The material properties used for the analysis are 304 stainless steel with elastic modulus of 193 GPa and yield stress of 215 MPa. The theoretical equation is derived from the relative elasticity relation of Gibson - Ashby ratio, the analysis was performed using Deform 3D, a commercial tool. In conclusion, the relative elasticity for this unit model correlates with 1.25 times the relative density and constant coefficient, elasticity is inversely proportional to pore size. The relative compressive strength has a correlation with relative density of 1.25 times. Proof of this is a real experiment, the derived theoretical relationship should further consider mechanical behavior such as bending and buckling. In the future, it is hoped that the research on the elasticity and the stress according to the structure of the three-dimensional space will be continued.

Keywords

Truss;Open Cell Structure;Hyper Cube;Sandwich Core;Unit cell

Acknowledgement

Supported by : Kyungnam University