Title Deformation Compensation of 3D Printed Irregular-shaped Expanded Polystyrene Formwork
Authors 이정호(Lee, Jeong-Ho) ; 주영규(Ju, Young K.)
DOI https://doi.org/10.5659/JAIK.2021.37.1.183
Page pp.183-190
ISSN 2733-6247
Keywords Irregular-shaped Structure; 3D Printer; Formwork; Deformation Compensation; Finite Element Analysis
Abstract In order to manufacture irregular-shaped formwork faster and cheaper than traditional timber or steel formworks, The F3D(Free-Form Formwork 3D Printer) technology that manufactures cut and laminated EPS(Expanded polystyrene) form-liner by LOM(Laminated object manufacturing) type 3D printers was adopted. Though EPS have excellent machinability, low density, material cost which make it applicable to formwork for irregular-shaped structure, EPS may undergo large deformation under lateral pressure exerted by fresh concrete because of its low compressive strength and elastic modulus. This paper present a process of deformation compensation to reduce deformation of EPS form-liner. To predict deformation of EPS, 3D finite element analysis considering later pressure by fresh concrete was used and deformation compensation plan based on analysis result was derived. The proposed compensation method was demonstrated using finite element analysis and evaluated by measuring geometric error of cylindrical product with various radius, slope, and curvature.