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Archard equationThe Archard equation is a simple model used to describe sliding wear and is based around the theory of asperity contact. Additional recommended knowledgeEquationwhere:
DerivationThe equation can be derived by first examining the behavior of a single asperity. The local load where P is the yield pressure for the asperity, assumed to be deforming plastically. P will be close to the indentation hardness, H, of the asperity. If the volume of wear debris, This fragment is formed by the material having slid a distance 2a Hence,
However, not all asperities will have had material removed when sliding distance 2a. Therefore, the total wear debris produced per unit distance moved, K is therefore a measure of the severity of wear. Typically for 'mild' wear, K ≈ 10−8, whereas for 'severe' wear, K ≈ 10−2. |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Archard_equation". A list of authors is available in Wikipedia. |