Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo

The lumbar vertebra 4s a, segment of the human spine that is commonly used during daily life. This consequently leads to a vertebral fracture and subsequent a low back pain. Low back pain is a top of musculoskeletal disorder and serious health problem. These problems are due to the heavy work, lifti...

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Main Author:	Zulkifli, Ahmad@Manap
Format:	Thesis
Language:	English
Published:	2012
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/7577/1/ZULKIFLI_BIN_AHMAD_%40_MANAP.PDF
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id	my-ump-ir.7577
record_format	uketd_dc
spelling	my-ump-ir.75772021-08-16T05:21:34Z Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo 2012 Zulkifli, Ahmad@Manap TA Engineering (General). Civil engineering (General) The lumbar vertebra 4s a, segment of the human spine that is commonly used during daily life. This consequently leads to a vertebral fracture and subsequent a low back pain. Low back pain is a top of musculoskeletal disorder and serious health problem. These problems are due to the heavy work, lifting and sudden forceful incidents. Furthermore, osteoporosis and bone fracture are related and most attention has been given to vertebral fractures. This disease described by loss of bone mass and increased the risk to fracture. The main objective of this work is to develop cracked structure of the lumbar vertebra model from image processing data using finite element modeling associated Monte Carlo methods. In nature, uncertainties play a critical role in understanding the vertebra injury on the cracked structure. The methodology comprises the lumbar vertebra modeling, uncertainties of cracked structure sampling, generate meshing technique, and probabilistic using Monte Carlo simulation. There are two types of model have been developed for this study; model for stress concentration (MPT), and model for crack structure (MSR). The function of MPT is to investigate the effect of critical stress subjected to the model whereas MSR is to simulate the cracked structure using finite element and probabilistic analysis. Meshing technique is generated as mapped mesh for cracked structure while a free mesh with suitable consideration to the whole body of vertebra. Since the vertebra is a brittle material, fracture criterions are based upon on the stress intensity factor for linear elastic fracture mechanics (LEFM). In order to operating the uncertainties of cracked structures sampling parameter, probabilistic analysis can be used to evaluate the probability of failure model when associated with the finite element analysis. Anatomical parameter of the model input variables is accounted by modeling these parameters as random variables caused a failure in vertebra structure are geometry, material properties and loading using Monte Carlo technique. The maximum stress was observed on the pedicle region with 2.2 MPa. This condition is weakening that area and tends to be fracture. There are 100 samples were recommended to obtain reasonable accurate point estimates and only 1% will be fail due to the applied stress exceeds the yield stress or material resistance. On the other hand, stress intensity factor (SIF) of opening mode become the most dominant compared to the shearing and tearing modes with 0.52 MPa'Im. In addition, sensitivity analysis was revealed that the force applied to the vertebral body and crack size parameters give a huge correlation with output response. In conclusion, the crack structure study on pedicle is useful to investigate the fracture characteristics phenomena in physiological loading. 2012 Thesis http://umpir.ump.edu.my/id/eprint/7577/ http://umpir.ump.edu.my/id/eprint/7577/1/ZULKIFLI_BIN_AHMAD_%40_MANAP.PDF application/pdf en public masters Universiti Kebangsaan Malaysia Fakulti Kejuruteraan Dan Alam Bina
institution	Universiti Malaysia Pahang Al-Sultan Abdullah
collection	UMPSA Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Zulkifli, Ahmad@Manap Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo
description	The lumbar vertebra 4s a, segment of the human spine that is commonly used during daily life. This consequently leads to a vertebral fracture and subsequent a low back pain. Low back pain is a top of musculoskeletal disorder and serious health problem. These problems are due to the heavy work, lifting and sudden forceful incidents. Furthermore, osteoporosis and bone fracture are related and most attention has been given to vertebral fractures. This disease described by loss of bone mass and increased the risk to fracture. The main objective of this work is to develop cracked structure of the lumbar vertebra model from image processing data using finite element modeling associated Monte Carlo methods. In nature, uncertainties play a critical role in understanding the vertebra injury on the cracked structure. The methodology comprises the lumbar vertebra modeling, uncertainties of cracked structure sampling, generate meshing technique, and probabilistic using Monte Carlo simulation. There are two types of model have been developed for this study; model for stress concentration (MPT), and model for crack structure (MSR). The function of MPT is to investigate the effect of critical stress subjected to the model whereas MSR is to simulate the cracked structure using finite element and probabilistic analysis. Meshing technique is generated as mapped mesh for cracked structure while a free mesh with suitable consideration to the whole body of vertebra. Since the vertebra is a brittle material, fracture criterions are based upon on the stress intensity factor for linear elastic fracture mechanics (LEFM). In order to operating the uncertainties of cracked structures sampling parameter, probabilistic analysis can be used to evaluate the probability of failure model when associated with the finite element analysis. Anatomical parameter of the model input variables is accounted by modeling these parameters as random variables caused a failure in vertebra structure are geometry, material properties and loading using Monte Carlo technique. The maximum stress was observed on the pedicle region with 2.2 MPa. This condition is weakening that area and tends to be fracture. There are 100 samples were recommended to obtain reasonable accurate point estimates and only 1% will be fail due to the applied stress exceeds the yield stress or material resistance. On the other hand, stress intensity factor (SIF) of opening mode become the most dominant compared to the shearing and tearing modes with 0.52 MPa'Im. In addition, sensitivity analysis was revealed that the force applied to the vertebral body and crack size parameters give a huge correlation with output response. In conclusion, the crack structure study on pedicle is useful to investigate the fracture characteristics phenomena in physiological loading.
format	Thesis
qualification_level	Master's degree
author	Zulkifli, Ahmad@Manap
author_facet	Zulkifli, Ahmad@Manap
author_sort	Zulkifli, Ahmad@Manap
title	Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo
title_short	Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo
title_full	Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo
title_fullStr	Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo
title_full_unstemmed	Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo
title_sort	analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo
granting_institution	Universiti Kebangsaan Malaysia
granting_department	Fakulti Kejuruteraan Dan Alam Bina
publishDate	2012
url	http://umpir.ump.edu.my/id/eprint/7577/1/ZULKIFLI_BIN_AHMAD_%40_MANAP.PDF
_version_	1783731926813638656

Analisis kepatahan ke atas vertebra lumbar tulang belakang menggunakan kaedah unsur terhingga dan monte carlo

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