Browsing Mechanical Engineering by Author "http://dx.doi.org/10.13039/501100002081"
Now showing items 1-8 of 8
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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, N.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 ... -
An experimental study on the key fretting variables for flexible marine risers
O'Halloran, Sinéad; Harte, Annette M.; Shipway, Philip H.; Leen, Sean B. (Elsevier, 2017-07-02)This paper presents an experimental investigation into the effects of contact conformity, contact pressure and displacement amplitude on the gross-slip fretting behaviour grease-lubricated cylinder-on-flat contacts in the ... -
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 H.; 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 ... -
Particle transport velocity correction for complex boundaries in the Finite Volume Particle Method
McLoone, Maryrose; Moghimi, Mohsen H.; Quinlan, Nathan J. (NUI Galway, 2018-06-26)Particle methods such as smoothed particle hydrodynamics (SPH) and the finite volume particle method (FVPM) can suffer from strongly non-uniform and anisotropic particle distributions when purely Lagrangian particle ... -
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 physically-based creep damage model for effects of different precipitate types
Ó. Murchú, C.; Leen, Sean B.; O'Donoghue, Padraic; Barrett, Richard A. (Elsevier, 2016-10-13)The development of a new precipitate coarsening continuum damage mechanics (CDM) model to simulate the multi-precipitate strengthening mechanisms present in 9Cr steels under high temperature creep deformation is presented ... -
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 ... -
A strain-gradient, crystal plasticity model for microstructure-sensitive fretting crack initiation in ferritic-pearlitic steel for flexible marine risers
Ashton, Patrick; Harte, Annette M.; Leen, Sean B. (Elsevier, 2018-02-03)A three-dimensional, strain-gradient, crystal plasticity methodology is presented for prediction of microstructure-sensitive length-scale effects in crack initiation, under fatigue and fretting fatigue conditions, for a ...