Browsing Mechanical Engineering by Author "Ó Brádaigh, Conchúr M."
Now showing items 1-11 of 11
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A combined XFEM and cohesive zone model for composite laminate microcracking and permeability
Grogan, DM,Bradaigh, CMO,Leen, SB; Grogan, David M.; Ó Brádaigh, Conchúr M. (Elsevier ScienceDirect, 2014-10-07)A novel computational methodology for predicting three-dimensional microcracking and permeability in composite laminates is presented, The methodology simulates microcrack initiation and propagation using the extended ... -
Damage and permeability in tape-laid theromplastic composite cryogenic tanks.
Grogan, David M.; Ó Brádaigh, Conchúr M.; McGarry, J. P.; Leen, Sean B. (2015-09-07) -
Damage characterisation of cryogenically cycled carbon fibre/PEEK laminates
Grogan, David M.; Leen, Sean B.; Ó Brádaigh, Conchúr M. (Elsevier ScienceDirect, 2014-08-14)A unique insight into damage formation in CF/PEEK laminates before, during and after cryogenic cycling, using optical microscopy and 3D X-ray computed tomography (CT), is presented. Thicker laminates were found to exhibit ... -
Design of composite tidal turbine blades
Grogan, David M.; Leen, Sean B.; Kennedy, Ciaran; Ó Brádaigh, Conchúr M. (2013-02-24)Tidal turbine blades are subjected to significant thrust and torsional loadings due to the high density ofthe seawater in which they operate. These thrust loadings lead to high bending moments at the bladeroot, which can ... -
Electrically-Heated Ceramic Composite Tooling for Out-of-Autoclave Manufacturing of Large Composite Structures
Ó Brádaigh, Conchúr M.; Doyle, Adrian; Doyle, Derrick; Feerick, P.J. (2011)This paper describes the development of electrically-heated ceramic composite tooling, aimed primarily at the manufacture of large composites structures, for aerospace or for wind energy. The tooling is designed to operate ... -
Fatigue life of pitch- and stall-regulated composite tidal turbine blades
Kennedy, Ciaran R.; Jaksic, Vesna; Leen, Sean B.; Ó Brádaigh, Conchúr M. (Elsevier, 2018-02-28)Tidal turbine blades are subject to harsh loading and environmental conditions, including large thrust and torsional loadings, relative to wind turbine blades, due to the high density of seawater, among other factors. The ... -
Permeability of carbon fibre PEEK composites for cryogenic storage tanks of future space launchers
Flanagan, M.; Grogan, David M.; Goggins, Jamie; Appel, Simon; Doyle, K.; Leen, Sean B.; Ó Brádaigh, Conchúr M. (Elsevier, 2017-06-15)This work presents an experimental investigation into the permeability of carbon fibre (CF) polyetheretherketone (PEEK) for cryogenic storage tanks for space applications. The effects of cryogenic cycling, manufacturing ... -
A preliminary design methodology for fatigue life prediction of polymer composites for tidal turbine blades
Kennedy, Ciaran R.; Ó Brádaigh, Conchúr M.; Leen, Sean B. (SAGE, 2012-07)Tidal turbine blades experience significant fatigue cycles during operation and it is expected that fatigue strength will be a major consideration in their design. Glass fibre reinforced polymers are a candidate low-cost ... -
Rotational moulding of PEEK polymer liners with carbon fibre/PEEK over tape-placement for space cryogenic fuel tanks
Murray, Brendan R.; Doyle, Adrian; Feerick, P. J.; Semprimoschnig, Christopher O.A.; Leen, Sean B.; Ó Brádaigh, Conchúr M. (Elsevier, 2017-07-15)PEEK polymers are investigated as replacement materials for metallic liners in composite overwrapped pressure vessels (COPVs) for fuel tank applications in space. A novel, integrally heated, rotational moulding tool has ... -
Void distributions and permeability prediction for rotationally moulded polymers
Murray, Brendan R.; Leen, Sean B.; Ó Brádaigh, Conchúr M. (SAGE, 2014-01-22)An experimental study of void distributions for rotationally moulded polyethylene is presented. The effects of key variables such as maximum process temperature and nominal wall thickness (via powder mass) are studied. ... -
An XFEM-Based Methodology for Fatigue Delamination and Permeability in Composites
Grogan, David M.; Leen, Sean B.; Ó Brádaigh, Conchúr M. (2014)Carbon fibre reinforced polymers (CFRP) are one of the prospective material families being investigated for use in the fuel tanks of future reusable space launch vehicles (RSLVs). The extreme thermo-mechanical loading that ...