In materials science, wear is erosion or sideways displacement of material from its "derivative" and original position on a solid surface performed by the action of another surface.
Wear is related to interactions between surfaces and more specifically the removal and deformation of material on a surface as a result of mechanical action of the opposite surface. The need for relative motion between two surfaces and initial mechanical contact between asperities is an important distinction between mechanical wear compared to other processes with similar outcomes.
The definition of wear may include loss of dimension from plastic deformation if it is originated at the interface between two sliding surfaces.
However, plastic deformation such as yield stress is excluded from the wear definition if it doesn't incorporates a relative sliding motion and contact against another surface despite the possibility for material removal, because it then lacks the relative sliding action of another surface.
Impact wear is in reality a short sliding motion where two solid bodies interact at an exceptional short time interval. Previously due to the fast execution, the contact found in impact wear was referred to as an impulse contact by the nomenclature. Impulse can be described as a mathematical model of a synthesised average on the energy transport between two travelling solids in opposite converging contact.
Cavitation wear is a form of wear where the erosive medium or counter-body is a fluid.
Corrosion may be included in wear phenomenons, but the damage is amplified and performed by chemical reactions rather than mechanical action.
Wear can also be defined as a process where interaction between two surfaces or bounding faces of solids within the working environment results in dimensional loss of one solid, with or without any actual decoupling and loss of material. Aspects of the working environment which affect wear include loads and features such as unidirectional sliding, reciprocating, rolling, and impact loads, speed, temperature, but also different types of counter-bodies such as solid, liquid or gas and type of contact ranging between single phase or multiphase, in which the last multiphase may combine liquid with solid particles and gas bubbles.
Other articles related to "wear":
... Due to this, practitioners often wear a dobok modeled after the Korean hanbok ... Traditional taekwondo practitioners may wear dobok that are identical or very similar to gi, with a cross-over jacket front, while International Taekwon-Do Federation-style taekwondo ... of Korean sword arts like kumdo usually wear wider pants, called chima baji (치마바지 literally, "skirt-pants") ...
... that are tied in the same way but have thin soles for indoor wear and dancing ... Traditionally, women and girls do not wear kilts but may wear ankle-length tartan skirts ... Women may also wear dress tartans which are modified versions which include white in place of a more prominent colour ...
... Witton-le-Wear is a small village in County Durham, England ... It is situated on the north bank of the River Wear, 6 km (3.7 mi) to the north-west of Bishop Auckland ...
... Erosive wear can be described as an extremely short sliding motion and is executed within a short time interval ... Erosive wear is caused by the impact of particles of solid or liquid against the surface of an object ... A common example is the erosive wear associated with the movement of slurries through piping and pumping equipment ...
... Other success, included when the book What Not to Wear gained Trinny and Susannah a British Book Award in 2003 for "The TV Film Book of the Year" ... Books by Trinny and Susannah linked with What Not to Wear include What Not to Wear (2002) What Not to Wear 2 For Every Occasion (2003) What Not to Wear The Rules (2004) What Not to Wear For Every Occasion (2004 ...
Famous quotes containing the word wear:
“If you are a dog and your owner suggests that you wear a sweater ... suggest that he wear a tail.”
—Fran Lebowitz (b. 1951)
“When my outward action doth demonstrate
The native act and figure of my heart
In compliment extern, tis not long after
But I will wear my heart upon my sleeve
For daws to peck at: I am not what I am.”
—William Shakespeare (15641616)
“We never really are the adults we pretend to be. We wear the mask and perhaps the clothes and posture of grown-ups, but inside our skin we are never as wise or as sure or as strong as we want to convince ourselves and others we are. We may fool all the rest of the people all of the time, but we never fool our parents. They can see behind the mask of adulthood. To her mommy and daddy, the empress never has on any clothesand knows it.”
—Frank Pittman (20th century)