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008			231121t20232023my a|||fr|||| 000 0 eng d
020			_aTHE0009793 (Local) _qHardback
040			_aUMP _beng _cUMP _erda
090			_aFTKMA .A49 2023 r Thesis
100	1		_aNoor Am Zura Binti Abdullah, _eauthor.
245	1	0	_aOptimisation of car crash box finite element model for crashworthiness analysis using model updating and factorial design method / _cNoor Am Zura Binti Abdullah
264		1	_aKuantan, Pahang : _bUMP, _c2023
264		4	_c©2023
300			_axvi,160 pages : _billustrations (some color) ; _c30 cm. +
336			_2rdacontent _atext
337			_2rdamedia _aunmediated
338			_2rdacarrier _avolume
347			_2rda _atext file _bPDF
500			_aFaculty of Mechanical and Automotive Engineering Technology
502			_aThesis (Doctor of Philosophy) -- Universiti Malaysia Pahang – 2023
504			_aIncludes bibliographical references
520	3		_aFinite element modeling and analysis are widely used method for simulating the structural behaviour of a system in order to provide information of the structure under various loading conditions. However, the constructed model not always accurate due to several factors such as simplifications in modeling, material properties, or uncertainties in boundary conditions. The model updating method is an optimisation technique that aims to improve the accuracy of finite element models by incorporating dynamic response data obtained from experimental testing. In the field of crashworthiness, the complexity of modelling can lead to inaccuracies, particularly when incorporating structural enhancements. This study investigates the reliability of model updating methods in reducing inaccuracies in finite element models used for crashworthiness analysis. The primary objective of this research project is to assess the performance of updated finite element models in providing accurate crash data for a car crash box structure. The updated model was evaluated for crash analysis, and its accuracy was compared with experimental crash test data. For comparison, response optimisation using factorial design was also conducted to obtain an optimised model with minimal error in crashworthiness analysis. The results of this study show that the best initial correlation with the welded crash box structure was achieved using a one-dimensional bar element (CBAR) with an average error of 5.3%. For the bolted crash box, the best correlation was achieved using a joint model that combined the usage of CBAR and a rigid element (RBE), labeled as BOLTED2, with an average error of 4.9%. After applying model updating, the SOLID model showed the best correlation for the welded specimen with an average error of 4.5%, while the BOLTED2 model remained the best for bolted specimens with a reduced average error of 4.7%. However, the investigation of the updated model's performance did not show a significant improvement for crashworthiness analysis. The optimisation study yielded satisfactory results, with the crash output parameters showing closer values to the experimentally obtained data. The outcomes of this project will contribute to the field of automotive engineering and, in particular, to vehicle manufacturers' efforts to produce safer vehicles that meet consumers' demands. This study emphasizes the need to improve computational simulation and analysis methods to generate more accurate predictions and minimise the problem of model discrepancies that arise during computational analysis. In addition, the study on model updating methods for crashworthiness analysis of car crash box structures has several potential applications in the field of automotive engineering and safety.
610	2	0	_xDissertations _aFaculty of Mechanical and Automotive Engineering Technology
650		0	_aUniversities and colleges _xDissertations
650		0	_aTheses
942			_2lcc _cTHESIS