Finite element analysis bending of composite sandwich beams with metal facesheets

This study investigates the structural bending behaviour of the sandwich composite beams with the use of face sheet metals. Three-Point bending was used to analyse the bending behaviour. Finite Element Analysis (FEA) was used to simulate past experimental studies of such bending. Past experimenta...

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Main Author: Rhuban S/O Jeva
Other Authors: Chai Gin Boay
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2024
Subjects:
Online Access:https://hdl.handle.net/10356/177771
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1777712024-06-01T16:54:14Z Finite element analysis bending of composite sandwich beams with metal facesheets Rhuban S/O Jeva Chai Gin Boay School of Mechanical and Aerospace Engineering MGBCHAI@ntu.edu.sg Engineering Finite element analysis metal facesheets Composite metal facesheets This study investigates the structural bending behaviour of the sandwich composite beams with the use of face sheet metals. Three-Point bending was used to analyse the bending behaviour. Finite Element Analysis (FEA) was used to simulate past experimental studies of such bending. Past experimental results were analysed and used to validate the FEA simulated results. ANSYS, an engineering simulation and 3D design software was used to perform FEA. Unifoam Polystyrene Foam was the material in interest for this study. This Foam acts as the core and is sandwiched between two aluminium face sheets. Various FEA models were simulated to find the optimal model that possessed the characteristics of allowing the analysis to be more efficient, simple as well as capable of maintaining a high level of accuracy overall. A total of four specimens with different dimensions and configurations were modelled and evaluated – Specimen 1, 2, 3 and 4. The first two specimens – Specimen 1 and 2, consisted of two core materials of varying thickness. These specimens were cross-referred with past experimental data and FEA analysis which made use of identical materials. Specimens 3 and 4 were face sheet metals sandwiching the core with varying thickness. Past FEA was used to evaluate the results of the two specimens. The analysis showed that cores sandwiched with face sheet metals had a higher flexural stiffness compared to just the core alone. Moreover, increasing the thickness of the core increased the force needed to bend. It also showed that the FEA results recorded higher forces compared to the experimental ones at the midsection of the specimens. Non-linear characteristics of the experimental study was not proven in this study. However, it did show similar linear elastic behaviour to previous studies that were conducted. However, an additional study that was conducted using a different core material was able to prove the non-linear region of the analysis. Poly Vinyl Chloride (PVC) Foam was able to prove the non-linear region of the analysis. In addditon, Ansys Composite PrePost (ACP) was studied to examine its applicability in such structures. Unfortunately, the ACP works well only with thin structures. Overall, the study did show that in order to simulate real-life conditions, the database has to be provided with sufficient and accurate parameters. Bachelor's degree 2024-05-31T04:09:26Z 2024-05-31T04:09:26Z 2024 Final Year Project (FYP) Rhuban S/O Jeva (2024). Finite element analysis bending of composite sandwich beams with metal facesheets. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/177771 https://hdl.handle.net/10356/177771 en B026 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Finite element analysis metal facesheets
Composite metal facesheets
spellingShingle Engineering
Finite element analysis metal facesheets
Composite metal facesheets
Rhuban S/O Jeva
Finite element analysis bending of composite sandwich beams with metal facesheets
description This study investigates the structural bending behaviour of the sandwich composite beams with the use of face sheet metals. Three-Point bending was used to analyse the bending behaviour. Finite Element Analysis (FEA) was used to simulate past experimental studies of such bending. Past experimental results were analysed and used to validate the FEA simulated results. ANSYS, an engineering simulation and 3D design software was used to perform FEA. Unifoam Polystyrene Foam was the material in interest for this study. This Foam acts as the core and is sandwiched between two aluminium face sheets. Various FEA models were simulated to find the optimal model that possessed the characteristics of allowing the analysis to be more efficient, simple as well as capable of maintaining a high level of accuracy overall. A total of four specimens with different dimensions and configurations were modelled and evaluated – Specimen 1, 2, 3 and 4. The first two specimens – Specimen 1 and 2, consisted of two core materials of varying thickness. These specimens were cross-referred with past experimental data and FEA analysis which made use of identical materials. Specimens 3 and 4 were face sheet metals sandwiching the core with varying thickness. Past FEA was used to evaluate the results of the two specimens. The analysis showed that cores sandwiched with face sheet metals had a higher flexural stiffness compared to just the core alone. Moreover, increasing the thickness of the core increased the force needed to bend. It also showed that the FEA results recorded higher forces compared to the experimental ones at the midsection of the specimens. Non-linear characteristics of the experimental study was not proven in this study. However, it did show similar linear elastic behaviour to previous studies that were conducted. However, an additional study that was conducted using a different core material was able to prove the non-linear region of the analysis. Poly Vinyl Chloride (PVC) Foam was able to prove the non-linear region of the analysis. In addditon, Ansys Composite PrePost (ACP) was studied to examine its applicability in such structures. Unfortunately, the ACP works well only with thin structures. Overall, the study did show that in order to simulate real-life conditions, the database has to be provided with sufficient and accurate parameters.
author2 Chai Gin Boay
author_facet Chai Gin Boay
Rhuban S/O Jeva
format Final Year Project
author Rhuban S/O Jeva
author_sort Rhuban S/O Jeva
title Finite element analysis bending of composite sandwich beams with metal facesheets
title_short Finite element analysis bending of composite sandwich beams with metal facesheets
title_full Finite element analysis bending of composite sandwich beams with metal facesheets
title_fullStr Finite element analysis bending of composite sandwich beams with metal facesheets
title_full_unstemmed Finite element analysis bending of composite sandwich beams with metal facesheets
title_sort finite element analysis bending of composite sandwich beams with metal facesheets
publisher Nanyang Technological University
publishDate 2024
url https://hdl.handle.net/10356/177771
_version_ 1814047198267047936