Browsing by Author "Harrison, Noel M."
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Computational methods for micromechanics characterisation: Application to and experimental investigation of metal additive manufacturing and heat treatment processes
Tu, Yuhui (NUI Galway, 2022-11-23)Powder bed fusion (PBF) is an additive manufacturing process in which finely focused thermal energy is used to selectively melt target regions within thin layers of metal powders. Due to the complex thermal conditions ... -
Computational modelling of dynamic recrystallisation of Ni-based superalloy during linear friction welding
Okeke, Saviour I.; Harrison, Noel M.; Tong, Mingming (Springer, 2022-01-12)Linear friction welding (LFW) is an advanced joining technology used for manufacturing and repairing complex assemblies like blade integrated disks (blisks) of aeroengines. This paper presents an integrated multiphysics ... -
Computational modelling of linear friction welding of Inconel 718
Okeke, Saviour Ifeanyichukwu (NUI Galway, 2022-07-15)Linear friction welding (LFW) is a solid-state joining technique that involves the rapid reciprocating motion of two workpieces under large compressive pressure, in order to generate friction heat and plastically deformed ... -
Cyclic plasticity of welded P91 material for simple and complex power plant connections
Li, Ming; Barrett, Richard A.; Scully, Stephen; Harrison, Noel M.; Leen, Sean B.; O’Donoghue, Padraic E. (Elsevier, 2016-02-10)This paper focuses on with the cyclic plasticity modelling of welded, ex-service P91 material. A multi material model is developed for high temperature cyclic plasticity, including the effects of the three different material ... -
Defect evaluation of the honeycomb structures formed during the drilling process
Ghabezi, Pouyan; Farahani, M.; Shahmirzaloo, Ali; Ghorbani, H.; Harrison, Noel M. (SAGE Publications, 2019-07-02)In this paper, a comprehensive experimental investigation was carried out to precisely characterize the delamination and uncut fiber in the drilling process. A digital imaging procedure was developed in order to calculate ... -
Dissolution of delta phase in Ni-based superalloy during linear friction welding: integrated multiphysics computational process modelling
Okeke, Saviour I.; Harrison, Noel M.; Tong, Mingming (Springer, 2021-06-15)Linear friction welding (LFW) is an increasingly popular solid-state joining method for challenging applications such as integrated blade disk of aero-engines. However, the influence of friction-generated heat on the ... -
The effect of inclusions on the high‐temperature low‐cycle fatigue performance of cast MarBN: Experimental characterisation and computational modelling
O'Hara, E. M.; Harrison, Noel M.; Polomski, B.K.; Barrett, R.A.; Leen, Sean B. (Wiley, 2018-06-15)The presence of inclusions is a known source of crack initiation and component failure in cast materials. In this work, the role of inclusions is investigated via a combined program of high-temperature low-cycle fatigue ... -
Evaluation and analysis of fracture modes in single composite basalt/epoxy fibres by photoelastic method and single fibre fragmentation test
Thornton, Eoghan; Ghabezi, Pouyan; Strain, Findhan; Harrison, Noel M. (Springer, 2022-04-11)In this work, the suitability of basalt fibres for uni-directional composite material applications, and adhesion between the fibres and the matrix they are embedded in have been investigated. A single fibre fragmentation ... -
Experimental and computational characterization of the effect of manufacturing-induced defects on high temperature, low-cycle fatigue for MarBN
O'Hara, Eimear M.; Phelan, B.; Osgerby, S.; Barrett, Richard A.; Raghavendra, R.; Leen, Sean B.; Harrison, Noel M. (Elsevier, 2020-05-22)Manufacturing-induced defects are a key source of crack initiation and component failure under high temperature cyclic loading. In this work, 3D X-ray micro-computed tomography and microstructural analysis of manufacturing-induced ... -
An experimental and computational investigation of the high temperature behaviour of MarBN steel with application to effects of manufacturing
O'Hara, Eimear Marie (NUI Galway, 2018-10-30)The key step for next generation power plants is the development of advanced materials capable of achieving high flexibility and efficiency at increased steam temperatures and pressures. Such operating conditions will cause ... -
An experimental and computational investigation of the post-yield behaviour of trabecular bone during vertebral device subsidence
Kelly, Nicola; Harrison, Noel M.; McDonnell, Pat F.; McGarry, J. Patrick (Springer-Verlag, 2013)Interbody fusion device subsidence has been reported clinically. An enhanced understanding of the mechanical behaviour of the surrounding bone would allow for accurate predictions of vertebral subsidence. The multiaxial ... -
Fatigue damage characterisation of MarBN steel for high temperature flexible operating conditions
O'Hara, Eimear M.; Harrison, Noel M.; Polomski, B. K.; Barrett, Richard A.; Leen, Sean B. (SAGE Publications, 2016-09-10)This article is concerned with the high temperature low cycle fatigue behaviour of a new nano-strengthened martensiticferritic steel, MarBN. A range of strain-controlled, low cycle fatigue tests are presented on MarBN at ... -
A high-fidelity crystal-plasticity finite element methodology for low-cycle fatigue using automatic electron backscatter diffraction scan conversion: Application to hot-rolled cobalt–chromium alloy
Tu, Yuhui; Leen, Sean B.; Harrison, Noel M. (SAGE Publications, 2021-05-11)The common approach to crystal-plasticity finite element modeling for load-bearing prediction of metallic structures involves the simulation of simplified grain morphology and substructure detail. This paper details a ... -
Hygrothermal deterioration in carbon/epoxy and glass/epoxy composite laminates aged in marine-based environment (degradation mechanism, mechanical and physicochemical properties)
Ghabezi, Pouyan; Harrison, Noel M. (Springer, 2022-01-27)One of the major challenges in off-shore tidal and wave energy devices is the ageing of these structures in the hostile marine environment, which limits their operating life. In this research, mechanical properties of aged ... -
Indentation characterization of glass/epoxy and carbon/epoxy composite samples aged in artificial salt water at elevated temperature
Ghabezi, Pouyan; Harrison, Noel M. (Elsevier, 2022-04-21)Micro-level composite properties are a key determinant of the long-term performance and life span of marine-based composite structures. In this paper, the effect of the aging process in salt water at room temperature and ... -
Influence of microstructural defects and hydrostatic pressure on water absorption in composite materials for tidal energy
Grogan, D.M.; Flanagan, M.; Walls, M.; Leen, Sean B.; Harrison, Noel M.; Mamalis, D.; Goggins, Jamie (SAGE Publications, 2018-01-06)The lifespan and economic viability of tidal energy devices are constrained, in part, by the complex degradation of the tidal turbine blade materials due to prolonged immersion in a hostile sub-sea environment. Seawater ... -
Investigation of the mechanical interaction of the trabecular core with an external shell using rapid prototype and finite element models
Mc Donnell, Patricia E.; Harrison, Noel M.; Lohfeld, Stefan; Kennedy, Oran; Zhang, Y.; McHugh, Peter E. (Elsevier, 2009-04-05)The mechanical properties of vertebral bone have been widely studied with the ultimate goal of improving fracture risk prediction. However, the mechanical interaction between the cortical shell and the trabecular core is ... -
Local and regional mechanical characterisation of a collagen-glycosaminoglycan scaffold using high-resolution finite element analysis
Stops, A.J.F.; Harrison, Noel M.; Haugh, M.G.; O’Brien, F.J.; McHugh, P.E. (Elsevier BV, 2010-05-01) -
Mechanical behavior and long-term life prediction of carbon/epoxy and glass/epoxy composite laminates under artificial seawater environment
Ghabezi, Pouyan; Harrison, Noel M. (Elsevier, 2019-12-06)This paper presents an investigation on the long-term performance of carbon/epoxy and glass/epoxy laminates in an artificial seawater environment with 3.5% salinity. Accelerated aging tests were conducted at 60 °C for ... -
Microstructural functionally graded Ti-6Al-4V via advanced laser-based technologies
Geng, Yaoyi (NUI Galway, 2021-11-10)Functionally graded material (FGM) is characterised by an intended spatial variation in material attributes within a single part. This thesis is focused on advanced laser-based manufacturing technologies of microstructural ...