Creep and its effects on a material

In summary, the conversation discusses the cause of deformation in a material and how temperature and intermolecular attraction play a role. It is mentioned that even a low stress can cause deformation if the temperature is high, but if the temperature is low, the force should be less than intermolecular attraction and not cause deformation. The conversation also mentions two potential mechanisms for creep, diffusional processes and dislocation glide, and provides a resource for more technical information on each.
  • #1
Aurelius120
152
16
TL;DR Summary
So I learnt that even at low temperatures materials subject to long periods of low stress would still break
What I do not get is why should a stress much lower than yield point cause deformation in a material?
If temperature is high intermolecular attraction is reduced and thus even low stress can deform things.

But if it is low
Then a force lower than yield point should be less than intermolecular attraction and should not deform it irrespective of time

Right?

Thank you
 
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  • #2

1. What is creep and how does it affect materials?

Creep is the gradual deformation of a material under constant stress or load over time. It can cause materials to become weaker, change shape, or even fail completely.

2. What factors contribute to creep in materials?

The main factors that contribute to creep in materials are temperature, stress level, and time. Higher temperatures and stress levels can accelerate the rate of creep, and longer exposure to these conditions can also increase the effects of creep.

3. How can creep be prevented or minimized in materials?

Creep can be prevented or minimized by using materials with higher melting points or stronger structures, reducing stress levels, and limiting exposure to high temperatures and prolonged stress. Proper design and maintenance can also help prevent creep in materials.

4. What are some common examples of materials that are affected by creep?

Some common examples of materials that are affected by creep include metals, ceramics, plastics, and concrete. These materials are often used in construction, manufacturing, and other industries where they are subjected to high temperatures and stress levels.

5. How does creep affect the lifespan of a material?

The effects of creep on a material can significantly reduce its lifespan. Creep can cause materials to become weaker, change shape, or fail completely, which can lead to structural failures and safety hazards. Proper design, maintenance, and monitoring can help extend the lifespan of materials and prevent potential failures due to creep.

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