Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"FE Modelling"”.
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Development of an inverse FE modelling method for material parameters identification based on indentation tests
In this work, an inverse FE modelling program based on the Kalman filter technique has been developed and used to study three material models (linear elastic, hyperelastic and hyper foam). Two error treatment methods have been developed and implemented in the program and their feasibilities for …
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Numerical and experimental investigation of mechanical strength of spot welded joints
In this work, an inverse FE modelling indentation method to predict the plastic ies of materials has been systematically studied and used to characterise detailed properties of spot welded joints in steel. An inverse program based on a dual indenter approach and continuous indentation curves has …
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Inverse Modelling of Material Parameters for Rubber-like material: Create a New Methodology of Predicting the Material Parameters using Indentation Bending Test
… is an important research area. In this work, different inverse FE modelling approaches to extract material parameters (Ogden model) has been assessed supported by several newly developed programs in producing or analysing the data. The effects of new material properties (e.g. negative Poisson’s …
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Computational biomechanics in the remodelling rat heart post myocardial infarction
… and understanding of mechanisms during different stages of MI by utilizing finite element (FE) modelling. Three-dimensional biventricular rat heart geometries were developed from cardiac magnetic resonance images of a healthy heart and a heart with left ventricular (LV) infarction two weeks …
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Enhancing signal to noise ratio for electrostatic transducers
… methodologies, which consist of analytical modelling and Finite Element (FE) Modelling, have been implemented. The analytical modelling identifies the required geometry for the FLAUT based on the desired operating resonant frequency; while FE then verifies the vibrational characteristics of …
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Non-invasive Measurement of Cholesterol in Human Blood by Impedance Technique: an Investigation by Finite Element Field Modelling
… of methodologies for numerical finite element (FE) modelling of simplified blood-cholesterol system, representing a real measurement system. This has been done first in 2D, to prove the concept and then in 3D, to take into account all of the effects that would only be present in 3D system as …
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Finite element modelling and analysis of composite flywheel disk including effects of filament-winding mosaic pattern
… units alternating in the radial and circumferential directions. The mosaic-patterned configuration is not normally considered in the general stress analysis procedures based on the conventional modelling of laminated composite structures, including those available in FEA packages. However, …
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Accumulating delivered dose to the rectum to improve toxicity prediction in prostate radiotherapy
… (GI) toxicity is a clinical issue suffered by up to 22% of prostate cancer radiotherapy patients. However, the relationship between radiation dose and toxicity is generally poorly understood. In prostate radiotherapy, the rectum is a dose-limiting structure to which treatment planning …
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Prediction of cracking in steel joint subjected to high cyclic strains
… one of the three basic methodologies: stress-life theory, strain-life theory, and the crack growth approach. These techniques are developed to determine the number of cycles to failure. Stress life theory is suitable when elastic stresses and strains are considered. However, for the components …
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A low cost, accurate instrument to measure the moisture content of building envelopes <i>in situ</i>
… energy consumption and a predictable service life. In order to achieve these goals the effects of combined heat, air and moisture (HAM) transfer must be understood. A suitable moisture measurement technique is thus required. There is a pressing need for a suitable instrument capable of <i>in …
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Dynamic Poroelastic Finite Element Deformation Modelling of the Bárðarbunga Volcano, Iceland, 2015-2024
Monitoring and modelling of ground deformation at volcanoes provides key insights into how a subsurface magmatic system is evolving due to magma movements at depth. Here, we present a dynamic poroelastic-reservoir Finite Element (FE) volcano deformation model. This thesis aims to reproduce the …
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Fundamental and engineering application studies of pressure-assisted injection forging of thick-walled tubular components
… were selected and qualified under six different loading conditions, based on which a simplified configuration for confined compression tests was proposed, and particularly, a unique biaxial testing machine was developed and used satisfactorily. The test data were subsequently used to …
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Using HR-pQCT and finite element analysis to inform clinical assessment of distal radius fractures
… immobilization following a DRF. Finite element (FE) modelling coupled with high-resolution peripheral quantitative computed tomography (HR-pQCT) allows for non-invasive in vivo assessment of bone density and stiffness throughout the fracture healing process, which may inform fracture healing …
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Development of a biomechanical model of the interface between the residual limb and prosthesis for trans-femoral amputees
… study investigates the use of finite element (FE) modelling techniques to predict the biomechanical behaviour at the residual limb / socket interface for the purpose of obtaining a quantitative evaluation of socket fit. Three dimensional FE models of the residual limb of trans-femoral amputees …
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Fatigue behaviour of CFRP-repaired corroded RC beams
… that cause fatigue, significantly reducing the life of the structure. With the use of fibre reinforced plastics (FRPs) to rehabilitate and extend the life of structures, the remaining fatigue life after the repair must be assessed. This research is focused on the use of CFRP for the repair of …
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Investigation of composite façade mullions
… loadings to investigate the temperature effect. Experiments under high strain rate loading have been performed at room temperature to find the relationship between section shear and tensile capacity and loading rates. As the mullions usually work as a simply supported beam under wind, …
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Predictive Modelling of CFRP-Steel Double Strap Joints
… is necessary to thoroughly study the factors affecting this bond strength. Despite the fact that some theoretical predictive modeling for the strength between steel/CFRP joints under various loading situations has been published, in this work, by using finite element modelling, one may compute …
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Using 3D Printing to Improve the Impact Resistance of Sandwich Panels
… regimes and then compared against two typical reference designs. The 3D printed ULTEM-1010 panel design showed a significant improvement in core compressive strength and indentation energy absorption in all testing regimes. However, it suffered from less bending stiffness compared to the …
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Seismic experimental analyses and surrogate models of multi-component systems in special-risk industrial facilities
… (PBEE) approach should, instead, be preferred. Along this vein, in recent years, much research has been devoted to setting computational fragility frameworks for special-risk industrial components and structures. However, within a PBEE perspective, studies have clearly remarked: i) a …
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Biomechanics of Cranial Decompression Procedures in Traumatic Brain Injury
… engineering methods such as finite element (FE) modelling may be used to inform neurosurgeons of the effects of this type of surgery so they can optimise on both a patient-specific and more general basis. This thesis develops finite element models of decompressive craniectomy using patient CT …
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