mechanical load
{{Short description|Physical stress on a mechanical system or component}}
Mechanical load is the physical stress on a mechanical system or component{{cite book|last=Rao|first=Singiresu S.|title=Reliability Based Design|year=1992|publisher=McGraw-Hill|location=USA|isbn=0-07-051192-6|pages=214–227}} leading to strain. Loads can be static or dynamic. Some loads are specified as part of the design criteria of a mechanical system. Depending on the usage, some mechanical loads can be measured by an appropriate test method in a laboratory or in the field.
Vehicle
It can be the external mechanical resistance against which a machine (such as a motor or engine), acts.American Heritage Dictionary of the English Language. The load can often be expressed as a curve of force versus speed.
For instance, a given car traveling on a road of a given slope presents a load which the engine must act against. Because air resistance increases with speed, the motor must put out more torque at a higher speed in order to maintain the speed. By shifting to a higher gear, one may be able to meet the requirement with a higher torque and a lower engine speed, whereas shifting to a lower gear has the opposite effect. Accelerating increases the load, whereas decelerating decreases the load.
Pump
Fan
Similar considerations apply to a fan. See Affinity laws.
See also
- Structural load - mechanical load applied to structural elements (in civil and mechanical engineering)
- Physical test