1.4 Temperature Effects on Output Force

Temperature also affects the output force. Just like a thermometer, the pressure inside a gas spring rises and falls with temperature. (This is known as CHARLES LAW.)

CHARLES LAW

= Initial pressure or force = Final pressure or force = Initial temperature = Final temperature

NOTE:
All temperatures must be expressed in degrees Kelvin (°C + 273) or degrees Rankin (°F + 460).

Figure 8

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Example:

If the pressure inside a spring were 1000 psi at 20C, then at -40° it would be 800 psi and at 80°C it would be 1200 psi. Similarly, if the output force of a spring were 100 lbs. at 20°C it would drop to 80 lbs. at -40°C and rise to 120 lbs. at 80°C.

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