Finite element modelling and analysis of certain "scissors-type" mechanism

Mechanisms are commonly used to convert input forces into desired output forces. Many different mechanisms exist in engineering. One of such mechanisms is the scissors mechanism. Common real-world applications of the scissors mechanisms include scissors lifts as well as mobile bridges. Most practica...

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Main Author: Lim, Lionel Li Rong
Other Authors: Sellakkutti Rajendran
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2022
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Online Access:https://hdl.handle.net/10356/159036
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1590362023-03-04T20:20:06Z Finite element modelling and analysis of certain "scissors-type" mechanism Lim, Lionel Li Rong Sellakkutti Rajendran School of Mechanical and Aerospace Engineering MSRajendran@ntu.edu.sg Engineering::Mechanical engineering Mechanisms are commonly used to convert input forces into desired output forces. Many different mechanisms exist in engineering. One of such mechanisms is the scissors mechanism. Common real-world applications of the scissors mechanisms include scissors lifts as well as mobile bridges. Most practical scissors mechanisms are rectilinear in nature (involving translational motion). However, curvilinear scissors mechanisms are quite rare. Hence, the focus of this project is to conduct finite element analysis of curvilinear scissors mechanisms so as to study its deformation behaviour, and natural frequencies and node shapes. For the finite element analysis, ANSYS Mechanical APDL (Student Version) is used. Firstly, using MATLAB, a visualisation of the trajectory of the curvilinear scissors mechanisms for the modelling of the mechanism is achieved. Next, a geometric model of the structure is constructed in ANSYS and meshed in appropriate finite element. Static structural and modal analysis are carried out. Two different curvilinear geometries (quadrant and semi-circular) as well as two different applications (robot arm and overhead shelter) are studied. The static analysis reveals that the maximum stress is developed in members in the vicinity of the support end. The maximum deflection is observed at the members in the vicinity of the applied load. The modal analysis reveals that the structure generally vibrates in 2 modes, viz., axial and bending modes. Bachelor of Engineering (Mechanical Engineering) 2022-06-09T04:33:49Z 2022-06-09T04:33:49Z 2022 Final Year Project (FYP) Lim, L. L. R. (2022). Finite element modelling and analysis of certain "scissors-type" mechanism. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/159036 https://hdl.handle.net/10356/159036 en B177 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::Mechanical engineering
spellingShingle Engineering::Mechanical engineering
Lim, Lionel Li Rong
Finite element modelling and analysis of certain "scissors-type" mechanism
description Mechanisms are commonly used to convert input forces into desired output forces. Many different mechanisms exist in engineering. One of such mechanisms is the scissors mechanism. Common real-world applications of the scissors mechanisms include scissors lifts as well as mobile bridges. Most practical scissors mechanisms are rectilinear in nature (involving translational motion). However, curvilinear scissors mechanisms are quite rare. Hence, the focus of this project is to conduct finite element analysis of curvilinear scissors mechanisms so as to study its deformation behaviour, and natural frequencies and node shapes. For the finite element analysis, ANSYS Mechanical APDL (Student Version) is used. Firstly, using MATLAB, a visualisation of the trajectory of the curvilinear scissors mechanisms for the modelling of the mechanism is achieved. Next, a geometric model of the structure is constructed in ANSYS and meshed in appropriate finite element. Static structural and modal analysis are carried out. Two different curvilinear geometries (quadrant and semi-circular) as well as two different applications (robot arm and overhead shelter) are studied. The static analysis reveals that the maximum stress is developed in members in the vicinity of the support end. The maximum deflection is observed at the members in the vicinity of the applied load. The modal analysis reveals that the structure generally vibrates in 2 modes, viz., axial and bending modes.
author2 Sellakkutti Rajendran
author_facet Sellakkutti Rajendran
Lim, Lionel Li Rong
format Final Year Project
author Lim, Lionel Li Rong
author_sort Lim, Lionel Li Rong
title Finite element modelling and analysis of certain "scissors-type" mechanism
title_short Finite element modelling and analysis of certain "scissors-type" mechanism
title_full Finite element modelling and analysis of certain "scissors-type" mechanism
title_fullStr Finite element modelling and analysis of certain "scissors-type" mechanism
title_full_unstemmed Finite element modelling and analysis of certain "scissors-type" mechanism
title_sort finite element modelling and analysis of certain "scissors-type" mechanism
publisher Nanyang Technological University
publishDate 2022
url https://hdl.handle.net/10356/159036
_version_ 1759857857961918464