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Glossary

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  • A

    • Active Power
      The amount of power actually doing useful work. Actual power is also referred to as actual power or real power2.
    • Actual Power
      The amount of power actually doing useful work. Actual power is also referred to as active power or real power.

  • B

    • Battery Capacity
      Batteries are rated by their manufacturers to put out a certain number of amperes for six hours before reaching a voltage of 1.70 volts per cell. If, for example, a battery is rated to put out 100 amperes for six hours, then its capacity rating is 6 hours x 100 amps = 600 ampere hours. If discharged faster, it will provide fewer ampere hours; if slower, it will produce more.
    • Battery Voltage
      The nominal open circuit battery voltage is 2 volts per cell. Measured more precisely, it varies in relation to the battery's state of charge. A fully charged battery (for most designs) will be 2.13 volts per cell, while a deeply discharged battery many go as low as 1.95 volts per cell. On charge, end of charge readings of 2.60-2.70 are normal. On charge readings must be temperature compensated by adding 0.010 volts per cell for every 3°F above 77°F and subtracting the same amount if below.

  • G

    • Gauge Length
      Unit of length which is used to calculate strain, the original sample length, height or grip separation.
    • Gauge Length
      Unit of length which is used to calculate strain, the original sample length, height or grip separation.
    • Gauge Length
      Unit of length which is used to calculate strain, the original sample length, height or grip separation.
    • Gauge Length
      Unit of length which is used to calculate strain, the original sample length, height or grip separation.
    • Gauge Length
      Unit of length which is used to calculate strain, the original sample length, height or grip separation.

  • I

    • Impact
      The striking of one body against another.

  • K

    • Knot Strength
      Measurement of the degradation of a material when a knot is formed due to compressive and tensile forces.

  • N

    • Necking
      Reduction of the cross sectional area of the metal in a portion of the sample caused by stretching.

  • O

    • Offset Yield
      Point of interception on the stress / strain curve, parallel to the line of best fit offset by a defined extension.

  • P

    • Peel Resistance
      Another name for bond strength.

  • R

    • Rate of Creeping
      Timed rate of deformation when the sample is subjected to a constant load at a constant temperature.

  • S

    • Seam
      Joint consisting of a line formed by joining two pieces.

  • T

    • Tack Test
      Applicable to adhesives. Two surfaces are contacted together at a set speed for a set duration and the force required to pull them apart is recorded.

  • V

    • Voltage
      Electrical pressure; force that causes current in an electrical conductor.