A global-local fretting analysis methodology and design study for the pressure armour layer of dynamic flexible marine risers

A review of advances in tribology in 2020–2021

“…Base on experimental investigations, four different methods and measures to protect a sealing system with radial shaft seals (RSS) from shaft wear were presented and discussed [453]. For improving assessment of fretting fatigue life, the theory of critical distances with mesh control was recommended in design [454], and a global-local fretting design methodology for the pressure armour layer of flexible marine risers was outlined [455].…”

Influence of normal load frequency on fretting fatigue behaviour by a critical plane-based approach

“…In particular, numerous experimental campaigns have been carried out, and different test apparatuses have been designed. Two categories of fretting fatigue test methods can be distinguished: structure-based methods [12][13][14][15][16] and material-based methods [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34].…”

“…Azevedo et al [15] designed a fretting fatigue test rig for overhead conductors, in order to obtain the S-N curve related to middle-high cycle fatigue regime of a steel reinforced aluminium conductor. An experimental campaign was carried out by O'Halloran et al [16] with the aim to quantify both friction coefficient and wear coefficient of a dynamic flexible marine riser made of a 080 M40 steel.…”

Impact of the Stress Status of Employees on the Enterprise Technology Management Cost Through Matter-Element Analysis Under Psychological Health Education

“…Stress is a very common mental health phenomenon in the present society, which refers to the physical and mental stress response of people, caused by external environmental factors (Waters et al, 2020). With the acceleration of the integration of global economy, the competition among enterprises is intensifying, and the fast-paced production eventually increases the pressure on employees, resulting in various mental health problems (O'Halloran et al, 2020;Rodríguez et al, 2020). Proper stress is naturally beneficial and can motivate individuals to work harder, whereas excessive and long-term stress will negatively affect physical and mental health of employees, and even cause a series of group problems, such as slacking, which prevents enterprises from operating normally (Dohi et al, 2019;Lambert et al, 2019;Rahman et al, 2019).…”