How do you calculate wear rate?
wear rate=(wear amount)/(sliding distance or time) (m/m, m3/m, kg/m, m/s, m3/s, kg/s). wear coefficient, or specific wear rate (also sometimes called wear factor) = (wear rate)/(normal force) (m3 N−1m−1).
What is Archard wear equation?
The Archard wear equation is a simple model used to describe sliding wear and is based on the theory of asperity contact.
What is the abrasive wear?
Abrasive wear occurs when a hard rough surface slides across a softer surface; in this case, wear is defined as a damage to a solid surface that generally involves progressive loss of material and is due to relative motion between that surface and a contacting substance or substances (ASM, 1998; ASTM, 1987).
What means wear rate?
The specific wear rate (usually specific wear or wear rate) that is the volume (or sometimes the mass) loss per unit force per unit distance of a body in motion against another one.
How is sliding distance calculated?
The sliding distance s can be replaced by s=v.t where v is the mean value for the slide rate and t the running time. Because the k-value depends just like the friction coefficient on a lot of parameters this factor is to be find experimentally. class 2/3: with teflon re-enforced bronze – tempered steel, dry.
Where is wear rate in pin on disc?
clean the pin in acetone, check the weight two to three time and note average weight. calculate the weight difference. the quantity can be divided by the linear path or as per required unit. Wear rate = (Mass of the sample before wear test – Mass of the sample after wear test)/sliding distance.
What is tribological Behaviour?
Tribology is the science of wear, friction and lubrication, and encompasses how interacting surfaces and other tribo-elements behave in relative motion in natural and artificial systems. This includes bearing design and lubrication.
What are some of the limitations with Archard’s wear equation?
What are the limitations of Archard wear equation?
- hardness of hard material is not considered.
- not discuss multipass.
- not addressed the role of wear debris size and shape.
- hardness after experiment not considered.
What are the two types of abrasive wear?
In general, there are two types of abrasive wear:
- Two-body abrasive wear – This type takes place when hard particles or grit eliminate material from the opposing surface.
- Three-body wear – This occurs when the particles are unconstrained and are able to slide down and roll on a surface.
How do you stop abrasive wear?
Wear may be prevented in many different ways. The most common techniques is to use wear resistant materials or simply by changing the material properties, e.g. by hardening. Wear can also be prevented by keeping the surfaces apart from each other. Oil and grease are commonly used for this purpose.
How is wear resistance calculated?
A wear factor is calculated with the equation W=K*F*V*T. In this equation W is wear volume (mm3), K is wear factor (mm3/N m)10-8, F is force (N), V is velocity (m/sec), and T is elapsed time (sec).