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Fatigue has traditionally been associated with the failure of metal components which led to the term metal fatigue. In the nineteenth century, the sudden failing of metal railway axles was thought to be caused by the metal crystallising because of the brittle appearance of the fracture surface, but this has since been disproved. [ 1 ]
Spoon theory is a metaphor describing the amount of physical or mental energy that a person has available for daily activities and tasks, and how it can become limited. The term was coined in a 2003 essay by American writer Christine Miserandino. In the essay, Miserandino describes her experience with chronic illness, using a handful of spoons ...
Metal fatigue occurs when metal - including parts in machines, vehicles and structures - sustains microscopic cracks after being exposed to repeated stress or motion, damage that tends to worsen ...
Decision fatigue is thought to be a result of unconscious, psychobiological processes, and is a reaction to sustained cognitive, emotional and decisional load, as opposed to a trait or deficiency. [ 6] Decision fatigue is an emergent construct [ 6] that has several possible applications in the fields of healthcare psychology, behavioural ...
Compassion fatigue is an evolving concept in the field of traumatology. The term has been used interchangeably with secondary traumatic stress ( STS ), [1] which is sometimes simply described as the negative cost of caring. [1] Secondary traumatic stress is the term commonly employed in academic literature, [2] although recent assessments have ...
Psychological abuse, often known as emotional abuse or psychological violence, is a form of abuse characterized by a person subjecting or exposing another person to a behavior that may result in psychological trauma, including anxiety, chronic depression, or post-traumatic stress disorder amongst other psychological problems.
Goodman relation. Within the branch of materials science known as material failure theory, the Goodman relation (also called a Goodman diagram, a Goodman-Haigh diagram, a Haigh diagram or a Haigh-Soderberg diagram) is an equation used to quantify the interaction of mean and alternating stresses on the fatigue life of a material. [ 1]
The fatigue limit or endurance limit is the stress level below which an infinite number of loading cycles can be applied to a material without causing fatigue failure. [ 1] Some metals such as ferrous alloys and titanium alloys have a distinct limit, [ 2] whereas others such as aluminium and copper do not and will eventually fail even from ...