[논문]생물학적 DNA 구조와 트러스구조의 융합으로 개발한 바람개비형 모델 선행연구

최정호

doi:10.15207/jkcs.2016.7.4.181

생물학적 DNA 구조와 트러스구조의 융합으로 개발한 바람개비형 모델 선행연구
Preliminary Development of Pinwheel Model Created by Convergent Truss Structure with Biological DNA Structure 원문보기

한국융합학회논문지 = Journal of the Korea Convergence Society, v.7 no.4, 2016년, pp.181 - 190

최정호 (한국항공우주산업주식회사 기체설계팀)

Abstract ▼ AI-Helper

The objective of this study is to find the effective stiffness and compressive strengths of a unit-cell pinwheel truss and double pinwheel truss model designed following a double helical geometry similar to that of the DNA (deoxyribonucleic acid) structure in biology. The ideal solution for their derived relative density is correlated with a ratio of the truss thickness and length. To validate the relative stiffness or relative strength, ABAQUS software is used for the computational model analysis on five models having a different size of truss diameter from 1mm to 5mm. Applied material properties are stainless steel type 304. The boundary conditions applied were fixed bottom and 5 mm downward displacement. It was assumed that the width, length, and height are all equal. Consequently, it is found that the truss model has a lower effective stiffness and a lower effective yielding strength.

주제어

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문제 정의

The objective is to develop a double helical structure with high stiffness, high strength, and high energy absorption capability similar to a lattice model or a lightweight structure. The disadvantage that this structure is likely to have are its bending/buckling behavior at points that cannot be predetermined and the high level of intricacy involved in the development of a realistic unit model based on the helical structure, which is likely to have a complex structure.
This study is focused on developing an advanced ideal solution incorporating the double helical structure. Therefore, this study defines a unit-cell model created on the basis of the helical structure which is a neo development and obtains the effective stiffness or effective strength.

가설 설정

The idea of a pinwheel truss model is derived from the double helix structure of the DNA. It is the result of a fusion between engineering analysis and biological concept.

제안 방법

The main aim of the analysis is to validate the pinwheel truss models by comparing them to Gibson-Ashby’s ideal solution with regard to the three characteristics.
This study is focused on developing an advanced ideal solution incorporating the double helical structure. Therefore, this study defines a unit-cell model created on the basis of the helical structure which is a neo development and obtains the effective stiffness or effective strength. In addition, the model is validated using Gibson-Ashby’s ideal solution.

대상 데이터

The material used is AISI304 stainless steel of initial yielding strength 215 MPa, ultimate strength 505 MPa, density 8.0 kg/cm3,Young’s modulus 200GPa, Poisson ratio 0.29, and friction coefficient 0.1.

이론/모형

To predict the effective compressive strength of a cubic truss model, we use an equation derived from the open cell created by Gibson-Ashby.
To verify the ideal solution of the pinwheel unit model, the five computational models are tested using ABAQUS software.

후속연구

Therefore, the pinwheel truss structure needs to be developed further to obtain higher effective elasticity and effective yielding strength. In future, it is hoped that real models made using advanced technology such as 3D printing [20,21,22] will be developed and that they will undergo precision testing. Moreover, the pinwheel truss model can be developed for application in a sandwich core and the Aerospace or ship manufacturing industry.

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