Uncertainty quantification of the failure assessment diagram for flawed steel components in BS 7910:2019

The failure assessment line (FAL) describes the interaction between plastic failure and fracture of flawed steel components subjected to tension or bending. This paper quantifies the model uncertainty of the FAL as provided in the internationally used British Standard BS 7910:2019 by comparing the assessment with the actual failure load of 82...

Influence of material anisotropy on fatigue crack growth in C–Mn steels of existing structures

Rolled steel plates and sections are often applied in structures in such a way that the principal load direction corresponds with the rolling direction. Examples are beams, arches, or pylons of bridges, supporting beams of ship decks, and the main elements of crane structures. However, some types of structure are subjected to a multiaxial stress...

Wind turbine control strategies to reduce wind turbine blade rain droplet erosion (WINDCORE) - final summary report

WINDCORE staat voor "Wind turbine control strategies to reduce wind turbine blade rain droplet erosion". De afname van de energieopbrengst gedurende de gebruiksduur van windturbines wordt mede veroorzaakt door het optreden van schade aan de windturbinebladen als gevolg van druppelslagerosie. Dit schademechanisme aan het neusprofiel van een...

Friction coefficients for steel to steel contact surfaces in air and seawater

Rain erosion resistance of injection moulded and compression moulded polybutylene terephthalate PBT

Offshore wind turbine rotor diameters still increase. Blade tip velocities are up to 110 m/s, giving rise to more severe raindrop impact conditions and related erosion of the wind turbine blades. In the current work droplet impingement erosion tests were performed for injection moulded and compression moulded polybutylene terephthalate PBT. The...

A combined experimental and numerical examination of welding residual stresses

This study examines residual stresses in bead-on-plate welded specimens in transverse direction over the thickness of the plate, using a combination of experimental and numerical procedures. Dilatometer and tensile tests were used to determine the phase transition temperatures with associated volumetric strains and the stressstrain relationships...

Testing of full scale composite journal bearings for offshore underwater applications

In the offshore industry, fibre reinforced sliding journal bearings are increasingly used due to their low-maintenance and self-lubricating characteristics. To be able to use the bearings in the rough offshore environment, under heavy loading, full scale tests are essential to assess the friction and wear rate development during use. For this...

Leading edge erosion of coated wind turbine blades: Review of coating life models

Erosion of the leading edge of wind turbine blades by droplet impingement wear, reduces blade aerodynamic efficiency and power output. Eventually, it compromises the integrity of blade surfaces. Elastomeric coatings are currently used for erosion resistance, yet the life of such coatings cannot be predicted accurately. This review paper gives an...

The influence of hydrogen on the fatigue life of metallic leaf spring components in a vacuum environment

Hydrogen is used as a process gas in vacuum environments for semiconductor manufacturing equipment. If hydrogen dissolves in metallic components during operation it can result in hydrogen embrittlement. In order to assess if hydrogen embrittlement occurs in such a vacuum environment a special fatigue test has been developed. Accelerated life...

Surface fatigue resistance of tool steel coated with thin brittle PVD layers

Chemicals / CAS carbon, 7440-44-0; steel, 12597-69-2