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  2. False brinelling - Wikipedia

    en.wikipedia.org/wiki/False_brinelling

    False brinelling of a bearing. False brinelling is a bearing damage caused by fretting, with or without corrosion, [1] that causes imprints that look similar to brinelling, but are caused by a different mechanism. False brinelling may occur in bearings which act under small oscillations [2] or vibrations. [3]

  3. Fretting - Wikipedia

    en.wikipedia.org/wiki/Fretting

    Examples of applications are blade bearings in wind turbines, helicopter rotor pitch bearings, and bearings in robots. If the bearing movement is limited to small motions the damage caused may be called fretting or false brinelling depending on mechanism encountered.

  4. Micro pitting - Wikipedia

    en.wikipedia.org/wiki/Micro_pitting

    In a normal bearing the surfaces are separated by a layer of oil, this is known as elastohydrodynamic (EHD) lubrication.If the thickness of the EHD film is of the same order of magnitude as the surface roughness, the surface topography is able to interact and cause micro pitting.

  5. Boeing’s terrible year is ending with the worst aviation ...

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    Boeing’s very bad year ended tragically on Sunday, as a 737 flown by Korean discount carrier Jeju Air crashed, killing 179 passengers and crew on board.. It’s not yet clear what caused the jet ...

  6. Stem cell therapy to correct heart failure in children could ...

    www.aol.com/stem-cell-therapy-correct-heart...

    Doctors and specialists at the Murdoch Children's Research Institute in Melbourne, Australia, are studying and reprogramming the potential of the blood to treat heart failure in children.

  7. The director of Home Alone says he nearly directed another iconic holiday film — National Lampoon's Christmas Vacation — but ultimately left after clashing with the film's star, actor Chevy ...

  8. Galling - Wikipedia

    en.wikipedia.org/wiki/Galling

    Galling is a common problem in sheet metal forming, bearings and pistons in engines, hydraulic cylinders, air motors, and many other industrial operations. Galling is distinct from gouging or scratching in that it involves the visible transfer of material as it is adhesively pulled ( mechanically spalled ) from one surface, leaving it stuck to ...

  9. Rihanna Performs Two of Her Own Songs at Karaoke — and the ...

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    Related: Rihanna Makes a Strong Case for Wearing Your PJs to Dinner in New Leopard-Print Savage X Fenty Onesie Though some fans criticized her vocals, others defended her impromptu performance ...