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http://dx.doi.org/10.21289/KSIC.2016.19.3.109

Study of Effective Stiffness and Effective Strength for a Pinwheel Model combined with Diamond Truss-Wall Corrugation (P-TDC)  

Choi, Jeong-Ho (Airframe Design Team, KAI The University of New South Wales)
Publication Information
Journal of the Korean Society of Industry Convergence / v.19, no.3, 2016 , pp. 109-124 More about this Journal
Abstract
The objective of this paper is to find the density, stiffness, and strength of truss-wall diamond corrugation model combined with pinwheel truss inside space. The truss-wall diamond corrugation (TDC) model is defined as a unit cell coming from solid-wall diamond corrugation (SDC) model. Pinwheel truss-wall diamond corrugation (P-TDC) model is made by TDC connected with pinwheel structure inside of the space. Derived ideal solutions of P-TDC is based on truss-wall and pinwheel truss model at first. And then it is compared with Gibson-Ashby's ideal solution. To validate the ideal solutions of the P-TDC, ABAQUS software is used to predict the density, strength, and stiffness, and then each of them are compared to the ideal solution of Gibson-Ashby with a log-log scale. Applied material property is stainless steel 304 because of having cost effectiveness. Applied parameters for P-TDC are 1 thru 5 mm diameter within fixed opening width as 4mm. In conclusion, the relative Young's modulus and relative yield strength of the P-TDC unit model is reasonable matched to the ideal expectations of the Gibson-Ashby's theory. In nearby future, P-TDC model is hoped to be applied to make sandwich core structure by advanced technologies such as 3D printing skills.
Keywords
Cellular Solids; Corrugation; Open Cell; Honeycomb; Periodic Cellular Metals;
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