What is creep in mechanics of materials?
Creep refers to a material science concept that describes the likelihood of a material to deform under an applied force of mechanical stress. Creep may also be known as material creep or cold flow.
How can we reduce creep in materials?
Control of the grain size and structure is also an effective method of reducing creep. Increasing the grain size by thermomechanical processes reduces the creep rate and extends the stress rupture life of metals by lowering the amount of grain boundary sliding.
What are the different types of creep?
Primary Creep: starts at a rapid rate and slows with time. Secondary Creep: has a relatively uniform rate. Tertiary Creep: has an accelerated creep rate and terminates when the material breaks or ruptures.
What is creep in polymers?
Creep is the tendency of a polymeric material to deform permanently under the influence of constant stress, as applied through tensile, compressive, shear, or flexural loading. It occurs as a function of time through extended exposure to levels of stress that are below the yield strength of the material.
What is creep explain?
What is creep? Creep may be defined as a time-dependent deformation at elevated temperature and constant stress. It follows, then, that a failure from such a condition is referred to as a creep failure or, occasionally, a stress rupture. The temperature at which creep begins depends on the alloy composition.
What is creep example?
The definition of a creep is the act of moving slowly or is slang for a scary or odd person who is unpleasant or repulsive. An example of a creep is a hill that is moving very slowly. An example of a creep is a scary, leering old man who always stares at you when you walk by his house.
What steps can be taken to reduce creep?
So, to reduce creep, reduce the load, or increase the size of the structural member. Though that may not be as easy as it sounds. Some concrete is more susceptible to creep than others. High water : cement ratio, poor choice of aggregate, use of some types of accelerator can increase the potential creep.
What are the possible causes of creep?
In addition to this creep of rail may also be caused due to following reasons.
- Insufficient numbers of sleepers is laid.
- Uneven spacing of sleepers.
- Improper expansion joints.
- Use of improper and faulty sleepers.
- Rails too light for the traffic carried by them.
- Poor drainage work.
What are the causes of creep?
Major Causes of Creep
- Creep may be developed due to forces that come into operation when the train is starting or stopping by application of brakes.
- Creep is also developed due to wave motions.
- Another reason creep develops because of unequal expansion and contraction owing to change in temperature.
What do you mean by creep?
Definition of creep 1a : to move along with the body prone and close to the ground A spider was creeping along the bathroom floor. b : to move slowly on hands and knees He crept toward the edge of the cliff. 2a : to go very slowly The hours crept by.
Why is creep important?
Creep in solids subjected to high stress, and temperature is one of the important topics in the scientific societies: therefore, the creep analysis becomes more significant in various industries. So, the creep analysis is vital and important for applications connecting high temperature and high stress.