Browsing Mechanical Engineering (Scholarly Articles) by Author "Science Foundation Ireland"
Now showing items 1-9 of 9
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Characterisation of LCF performance of X100 weld-joints: Mechanistic yield strength modelling, finite element analyses and DIC testing
Long, D.J.; Devaney, R.J.; O'Donoghue, P.E.; Song, H.; Barrett, R.A.; Leen, Sean B. (Elsevier, 2021-03-26)This paper is concerned with the effect of welding on the fatigue behaviour of X100 material for steel catenary risers. The methodology includes both modelling and experimental characterisation. The modelling combines (i) ... -
A dislocation mechanics constitutive model for effects of welding-induced microstructural transformation on cyclic plasticity and low-cycle fatigue for X100Q bainitic steel
Devaney, Ronan J.; Barrett, Richard A.; O'Donoghue, Padraic E.; Leen, Sean B. (Elsevier, 2020-12-14)This paper presents a physically-based cyclic viscoplasticity model to capture the influence of welding-induced microstructural transformation on the fatigue response of the bainitic high-strength low-alloy steel, X100Q. ... -
A dislocation-based yield strength determination model in nano-indentation test
Tao, Ping; Ye, Fei; Gong, Jianming; Barrett, Richard A.; Leen, Sean B. (SAGE Publications, 2021-02-20)This paper presents a dislocation-based yield strength model for the nano-indentation size effect. The model is based on functional expressions involving the densities of statistically stored dislocations and geometrically ... -
Dual-phase cohesive zone modelling and experimental validation for hydrogen-assisted cracking of 2205 duplex stainless steel
Tao, Ping; Ye, Fei; Gong, Jianming; Yang, Xinyu; Barrett, Richard A.; Leen, Sean B. (Elsevier, 2021-01-01)The hydrogen-assisted cracking (HAC) behavior of 2205 duplex stainless steel is investigated via experimental testing and computational modelling, with specific focus on developing a predictive methodology for the coupled ... -
Effect of welding on microstructure and mechanical response of X100Q bainitic steel through nanoindentation, tensile, cyclic plasticity and fatigue characterisation
Devaney, Ronan J.; O'Donoghue, Padraic E.; Leen, Sean B. (Elsevier, 2020-12-30)This paper presents an experimental characterisation of fatigue at welded connections for the next-generation high-strength low-alloy offshore riser steel, X100Q. An instrumented girth weld is conducted with a parallel ... -
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 ... -
Experimental investigation on damage evolution in pre-corroded aluminum alloy 7075-T7651 under fatigue loading
Song, Haipeng; Liu, Changchun; Zhang, Hao; Yang, Xudong; Chen, Yajun; Leen, Sean B. (Elsevier, 2020-09-01)This paper experimentally investigates the fatigue damage evolution in pre-corroded aluminum alloy (AA) 7075-T7651 via digital image correlation (DIC) and scanning electron microscopy (SEM). Three stages of fatigue damage ... -
Towards a process-structure model for Ti-6Al-4V during additive manufacturing
Yang, Xinyu; Barrett, Richard A.; Tong, Mingming; Harrison, Noel M.; Leen, Sean B. (Elsevier, 2020-12-15)This paper presents the development of an integrated approach for microstructure prediction in laser beam powder bed fusion (PBF-LB) manufacturing of Ti-6Al-4V, primarily focused on the solidification morphology and ... -
Welding-induced yield strength heterogeneity in X100Q: Modelling and characterisation
Long, D.J.; Devaney, R.J.; Leen, Sean B.; Barrett, Richard A. (Elsevier, 2021-09-14)Yield strength (YS) heterogeneity in X100Q high strength low alloy (HSLA) steel welded joints is a key factor which influences fatigue life performance. The effects of welding-induced microstructural changes are investigated ...