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  2. K-factor (metallurgy) - Wikipedia

    en.wikipedia.org/wiki/K-factor_(metallurgy)

    The K-factor is the bending capacity of sheet metal, and by extension the forumulae used to calculate this. [1] [2] [3] Mathematically it is an engineering aspect of geometry. [4] Such is its intricacy in precision sheet metal bending [5] (with press brakes in particular) that its proper application in engineering has been termed an art. [4] [5]

  3. Lankford coefficient - Wikipedia

    en.wikipedia.org/wiki/Lankford_coefficient

    The Lankford coefficient (also called Lankford value, R-value, or plastic strain ratio) [1] is a measure of the plastic anisotropy of a rolled sheet metal. This scalar quantity is used extensively as an indicator of the formability of recrystallized low-carbon steel sheets.

  4. Bending (metalworking) - Wikipedia

    en.wikipedia.org/wiki/Bending_(metalworking)

    The K-factor formula does not take the forming stresses into account but is simply a geometric calculation of the location of the neutral line after the forces are applied and is thus the roll-up of all the unknown (error) factors for a given setup. The K-factor depends on many variables including the material, the type of bending operation ...

  5. K-factor - Wikipedia

    en.wikipedia.org/wiki/K-factor

    K-factor (Elo rating system), a constant used in Elo rating system; K-factor (marketing), the growth rate of websites, apps, or a customer base; K-factor (sheet metal), the ratio of location of the neutral line to the material thickness; The K Factor, a fictional TV show within Harry Hill's TV Burp; Bondi k-factor, the "k" in Bondi k-calculus

  6. Stress intensity factor - Wikipedia

    en.wikipedia.org/wiki/Stress_intensity_factor

    In fracture mechanics, the stress intensity factor (K) is used to predict the stress state ("stress intensity") near the tip of a crack or notch caused by a remote load or residual stresses. [1] It is a theoretical construct usually applied to a homogeneous, linear elastic material and is useful for providing a failure criterion for brittle ...

  7. Fatigue limit - Wikipedia

    en.wikipedia.org/wiki/Fatigue_limit

    The surface modifying factor, , is related to both the tensile strength, , of the material and the surface finish of the machine component. k S = a S u t b {\displaystyle k_{S}=aS_{ut}^{b}} Where factor a and exponent b present in the equation are related to the surface finish.

  8. Claes Dahlbäck - Pay Pals - The Huffington Post

    data.huffingtonpost.com/paypals/claes-dahlback

    From January 2008 to December 2012, if you bought shares in companies when Claes Dahlbäck joined the board, and sold them when he left, you would have a -40.6 percent return on your investment, compared to a -2.8 percent return from the S&P 500.

  9. Sheet metal - Wikipedia

    en.wikipedia.org/wiki/Sheet_metal

    Sheet metal is available in flat pieces or coiled strips. The coils are formed by running a continuous sheet of metal through a roll slitter. In most of the world, sheet metal thickness is consistently specified in millimeters. In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its ...