Results 91 to 100 of about 428,185 (211)

The path to virtual testing for certification of large composite wind turbine blades: Challenges, progress and insights

open access: yesComposites Part C: Open Access
Rapid innovation in wind turbine blade design has resulted in blades that exceed 150 metres in length, this progress has also intensified the challenges associated with traditional blade certification.
Rasmus Kaalund Schøn   +2 more
doaj   +1 more source

Experimental and analytical study of cracks under biaxial fatigue [PDF]

open access: yes, 2016
Most mechanical components experience multi-axial cyclic loading conditions during service. Experimental analysis of fatigue cracks under such conditions is not easy and most works tend to focus more on the simpler but less realistic case of uni-axial ...
Camas, Daniel   +5 more
core  

Impact of NASA-sponsored research on aircraft turbine engine bearing specifications [PDF]

open access: yes, 1983
The advancement of the state-of-the-art in aircraft bearing materials technology is reviewed.
Nahm, A. H.
core   +1 more source

A Full-Scale Tidal Blade Fatigue Test using the FastBlade Facility

open access: yesRenewable Energy
Fatigue testing of tidal turbine blades requires the application of cyclic loads without the ability to match the natural frequency of the blade due to their high stiffness and the associated thermal issues of testing composite materials at those frequencies (i.e., 18–20 Hz).
Sergio Lopez Dubon   +5 more
openaire   +2 more sources

High Specification Offshore Blades. Work Package: 1C – Blade Materials. [PDF]

open access: yes, 2008
Blades are regarded as the only component unique to wind turbine blades. They represent only 10 – 15% of the total system cost so the perception is that a reduction in the cost of energy through blade cost improvements is constrained.
York, Christopher
core  

Certification of damage tolerant composite structure [PDF]

open access: yes
A reliability based certification testing methodology for impact damage tolerant composite structure was developed. Cocured, adhesively bonded, and impact damaged composite static strength and fatigue life data were statistically analyzed to determine ...
Dill, Harold D.   +3 more
core   +1 more source

Maternal perinatal vulnerability and its influencing factors in different stages. [PDF]

open access: yesBMC Pregnancy Childbirth
Feng Z   +5 more
europepmc   +1 more source

[Report of] Specialist Committee V.4: ocean, wind and wave energy utilization

open access: yes, 2009
The committee's mandate was :Concern for structural design of ocean energy utilization devices, such as offshore wind turbines, support structures and fixed or floating wave and tidal energy converters. Attention shall be given to the interaction between
Argyriadis, K.   +10 more
core  

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