Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design

Magneto-rheological (MR) fluids in squeeze mode able to produce stress resistance up to 80kPa which is exceeded most basic requirement of normal mechanical application. However, to attain the good performance of stress resistance at acceptable suspension stability, the composition of MR fluids has t...

Full description

Saved in:

Bibliographic Details
Main Author:	Siti Aishah, Wahid
Format:	Thesis
Language:	English
Published:	2019
Subjects:	TA Engineering (General) Civil engineering (General) TS Manufactures
Online Access:	http://umpir.ump.edu.my/id/eprint/34722/1/Optimization%20of%20magneto-rheological%20fluid%20in%20squeeze%20mode%20using%20combined.ir.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-ump-ir.34722
record_format	uketd_dc
spelling	my-ump-ir.347222022-10-14T02:54:53Z Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design 2019-08 Siti Aishah, Wahid TA Engineering (General). Civil engineering (General) TS Manufactures Magneto-rheological (MR) fluids in squeeze mode able to produce stress resistance up to 80kPa which is exceeded most basic requirement of normal mechanical application. However, to attain the good performance of stress resistance at acceptable suspension stability, the composition of MR fluids has to be optimized. The aim of this study is to optimize the MR fluid materials’ component mixture in squeeze mode application through investigation on the effect of materials parameter on suspension stability and stress resistance. This study has been conducted through design of experiment (DOE) methodology using combined D-Optimal Mixture Design (CDMD) model. The CDMD allowed optimization of combined MR fluid components mixture and carrier fluid viscosity to produce relationship between material parameters and both stability and stress resistance. Ranges of materials composition were determined using factorial DOE and data from previous work. The investigated range of mineral oil (MO), carbonyl iron particles (CIP) and fumed silica (FS) were between 60-75vol%, 20-40vol% and 5- 10vol% respectively. Meanwhile the investigated range of carrier fluid viscosity was set between 18.5cP to 98.1cP. The stability was measured using sedimentation observation analysis while the stress resistances were measured using rheological analysis and compression test analysis. The finding of this study shows that increment of carrier fluid viscosity reduced sedimentation rate from 8.75% to 2.5% and reduced the compression stress resistance from 0.86MPa to 0.72MPa. Composition of CIP is the most significant factor to affect both sedimentation and stress resistance. Increment of CIP composition reduced the sedimentation rate but increased the stress resistance. Though FS composition shows least significant in the changes of stress resistance, it’s important to stabilize the suspension. Optimization of materials parameter through CDMD model analysis resulting five resultant compositions at desirability value of 1. The best resultant composition produced 0.09% of sedimentation rate, 89kPa of shear stress and 18.9MPa compression stress. This study shows stabilized MR fluid can be produced for squeeze mode application by selecting higher viscosity of carrier fluid and increasing magnetic particles composition. Optimization model produced in this study is crucial for composing dedicated MR fluid for squeeze mode MR devices. 2019-08 Thesis http://umpir.ump.edu.my/id/eprint/34722/ http://umpir.ump.edu.my/id/eprint/34722/1/Optimization%20of%20magneto-rheological%20fluid%20in%20squeeze%20mode%20using%20combined.ir.pdf pdf en public masters Universiti Malaysia Pahang Faculty of Mechanical & Manufacturing Engineering
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General) TS Manufactures
spellingShingle	TA Engineering (General) Civil engineering (General) TS Manufactures Siti Aishah, Wahid Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design
description	Magneto-rheological (MR) fluids in squeeze mode able to produce stress resistance up to 80kPa which is exceeded most basic requirement of normal mechanical application. However, to attain the good performance of stress resistance at acceptable suspension stability, the composition of MR fluids has to be optimized. The aim of this study is to optimize the MR fluid materials’ component mixture in squeeze mode application through investigation on the effect of materials parameter on suspension stability and stress resistance. This study has been conducted through design of experiment (DOE) methodology using combined D-Optimal Mixture Design (CDMD) model. The CDMD allowed optimization of combined MR fluid components mixture and carrier fluid viscosity to produce relationship between material parameters and both stability and stress resistance. Ranges of materials composition were determined using factorial DOE and data from previous work. The investigated range of mineral oil (MO), carbonyl iron particles (CIP) and fumed silica (FS) were between 60-75vol%, 20-40vol% and 5- 10vol% respectively. Meanwhile the investigated range of carrier fluid viscosity was set between 18.5cP to 98.1cP. The stability was measured using sedimentation observation analysis while the stress resistances were measured using rheological analysis and compression test analysis. The finding of this study shows that increment of carrier fluid viscosity reduced sedimentation rate from 8.75% to 2.5% and reduced the compression stress resistance from 0.86MPa to 0.72MPa. Composition of CIP is the most significant factor to affect both sedimentation and stress resistance. Increment of CIP composition reduced the sedimentation rate but increased the stress resistance. Though FS composition shows least significant in the changes of stress resistance, it’s important to stabilize the suspension. Optimization of materials parameter through CDMD model analysis resulting five resultant compositions at desirability value of 1. The best resultant composition produced 0.09% of sedimentation rate, 89kPa of shear stress and 18.9MPa compression stress. This study shows stabilized MR fluid can be produced for squeeze mode application by selecting higher viscosity of carrier fluid and increasing magnetic particles composition. Optimization model produced in this study is crucial for composing dedicated MR fluid for squeeze mode MR devices.
format	Thesis
qualification_level	Master's degree
author	Siti Aishah, Wahid
author_facet	Siti Aishah, Wahid
author_sort	Siti Aishah, Wahid
title	Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design
title_short	Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design
title_full	Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design
title_fullStr	Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design
title_full_unstemmed	Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design
title_sort	optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design
granting_institution	Universiti Malaysia Pahang
granting_department	Faculty of Mechanical & Manufacturing Engineering
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/34722/1/Optimization%20of%20magneto-rheological%20fluid%20in%20squeeze%20mode%20using%20combined.ir.pdf
_version_	1783732209539088384

Optimization of magneto-rheological fluid in squeeze mode using combined d-optimal mixture design

Similar Items