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- LIGHTWEIGHT DESIGN OF MECHANICAL STRUCTURES
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LDMS 10620300 Santoro presentation
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Lightweight Design of Mechanical Structures (097500) Material replacement: chair arm support Fabio Santoro - 10620300 January 25, 2024 LDMS Outline 1 Object of the work 2 New Material 3 Problem description • Load and design constraints 4 Proposed solution 5 Analytical model • Matlab FE solver 6 FE model 7 Mass reduction results 8 Manufacturing and joining techniques 9 Conclusions 10 Further discussions Fabio Santoro - 10620300 1 LDMS Object of the work Material replacement of a chair arm support Figure 1: Arm support Original material: AISI 304 Stainless Steel. Thk=5mm Fabio Santoro - 10620300 2 LDMS New Material Material comparison Stage 1: Young's modulus (GPa) vs. Density (kg/m^3) Granta EduPack 2021 R2 © 2021 ANSYS, Inc. or its affiliated companies. All rights reserved. Density (kg/m^3) 2000 5000 10000 Young's modulus (GPa) 100 150 200 Composites Stainless steel Metals and alloys Figure 2: Granta Edupack: E 1/2/ρ Fabio Santoro - 10620300 3 LDMS New Material Carbon fiber: T800/Epoxy Lamina characteristics: E1 = 161.3GPa σ1,t = 2300MPa E2 = 8.82GPa σ1,c = 1080MPa ν12 = 0.33 σ2,t = 30MPa G12 = 5.311GPa σ2,c = 70MPa G13 = 5.311GPa τs = 161.3MPa G23 = 2.744GPa ρ = 1.5e−6kg /mm3 ∆E % = −23.2% ∆ ρ% = −80.9% Fabio Santoro - 10620300 4
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