What is stick-slip behavior?

Stick slip refers to the fast movement that occurs between two sides of a fault when the two sides of the fault become unstuck. The rock becomes distorted, or bent, but holds its position until the earthquake occurs. When the rock snaps back into an unstrained position it is called elastic rebound.

Under what conditions does stick-slip occur?

Stick–slip occurs in many situations where frictional excitation is present, for example a violin bow acting on the string. As an illustration of ‘stick–slip’, consider a solid body of mass M resting on a belt moving with speed v0, as shown in Figure 9.10. It is held against the belt by a normal load N.

Why is stick-slip bad?

Stick-slip is highly undesirable in slideway operations, as the irregular movement can result in inaccurate machining operations, poor quality of finished parts and overall productivity loss.

How do you stop a stick-slip?

How to Avoid Stick-Slip in Your Seals

1. Material hardness, elasticity, friction, and chemical properties: ensure compatibility between surfaces.
2. Surface roughness: ensure shafts or cylinders are neither too smooth nor too rough.
3. Fluid lubricity: change fluid if necessary, or use oil treatments or friction reducers.

What is sticking condition?

In hot forging of steel and other alloys the coefficient of friction is high and also little or no lubricant is used. In such a condition, a layer of metal contacting the die-surface may stick onto the die and flow may take place just under the surface layer. This condition of friction is called sticking friction.

How can stick slip be avoided during forward motion?

Contact pressure: lower to the functional optimum. Temperature: ensure dissipation of frictional heat. Side-loading: check cylinder alignment and ensure adequate bearing area. Cycle speed: increase movement velocity if possible.

What is stick motion?

The stick-slip phenomenon, also known as the slip-stick phenomenon or simply stick-slip, is the spontaneous jerking motion that can occur while two objects are sliding over each other.

What is stick-slip in drilling?

Stick-slip, a mode of drilling dysfunction characterized by a cycle of the bit coming to a stop and accelerating to speeds greater than the mean bottomhole assembly (BHA) speed, has become an important risk element in oil and gas drilling operations.

How do you prevent stick slips?