Abstract
Purpose – The purpose of this paper is to present the study of octagonal lattice structure for investment casting stereolithography (SL) patterns, and compare it with the former hexagonal structure (of the QuickCast 2.0 build style). This research aims to introduce a new internal lattice structure for investment casting SL patterns.Design/methodology/approach – Applying 3D‐coupled thermal‐mechanical finite element analysis; magnitudes of exerted hoop stresses on ceramic shell (during burnout stage) have been computed. As an experimental observation of stress evaluation for cylindrical hexagonal and octagonal models, magnitudes of hoop and axial strains have been evaluated by installing self‐temperature compensation strain gauges. In addition, practical results have been obtained by the real‐time strain gauging of the cylindrical models during the heating process up to 100°C.Findings – The performance of SL pattern depends on several factors including the void ratio, drainage ability, dimensional accuracy,...
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