Deformation (mechanics) | Wikipedia audio article
Channel: wikipedia tts
Date: 04/10/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Deformation_(mechanics)


00:02:05 1 Strain
00:04:49 1.1 Strain measures
00:06:58 1.1.1 Engineering strain
00:08:43 1.1.2 Stretch ratio
00:10:18 1.1.3 True strain
00:12:19 1.1.4 Green strain
00:13:15 1.1.5 Almansi strain
00:14:15 1.2 Normal and shear strain
00:14:41 1.2.1 Normal strain
00:19:21 1.2.2 Shear strain
00:28:05 1.3 Metric tensor
00:28:50 2 Description of deformation
00:31:22 2.1 Affine deformation
00:35:21 2.2 Rigid body motion
00:35:35 3 Displacement
00:39:45 3.1 Displacement gradient tensor
00:41:01 4 Examples of deformations
00:49:55 4.1 Plane deformation
00:50:32 4.1.1 Isochoric plane deformation
00:51:10 4.1.2 Simple shear
00:54:30 5 See also
00:55:30 6 References
00:56:00 7 Further reading
01:00:25 See also



Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.

Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain

Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.

Listen on Google Assistant through Extra Audio:
https://assistant.google.com/services/invoke/uid/0000001a130b3f91
Other Wikipedia audio articles at:
https://www.youtube.com/results?search_query=wikipedia+tts
Upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts
Speaking Rate: 0.9226462096146483
Voice name: en-US-Wavenet-E


"I cannot teach anybody anything, I can only make them think."
- Socrates


SUMMARY
=======
Deformation in continuum mechanics is the transformation of a body from a reference configuration to a current configuration.  A configuration is a set containing the positions of all particles of the body.
A  deformation may be caused by external loads, body forces (such as gravity or electromagnetic forces), or changes in temperature, moisture content, or chemical reactions, etc.
Strain is a description of deformation in terms of relative displacement of particles in the body that excludes rigid-body motions.  Different equivalent choices may be made for the expression of a strain field depending on whether it is defined with respect to the initial or the final configuration of the body and on whether the metric tensor or its dual is considered.
In a continuous body, a deformation field results from a stress field induced by applied forces or is due to changes in the temperature field inside the body. The relation between stresses and induced strains is expressed by constitutive equations, e.g., Hooke's law for linear elastic materials. Deformations which are recovered after the stress field has been removed are called elastic deformations. In this case, the continuum completely recovers its original configuration. On the other hand, irreversible deformations remain even after stresses have been removed. One type of irreversible deformation is plastic deformation, which occurs in material bodies after stresses have attained a certain threshold value known as the elastic limit or yield stress, and are the result of slip, or dislocation mechanisms at the atomic level. Another type of irreversible deformation is viscous deformation, which is the irreversible part of viscoelastic deformation.
In the case of elastic deformations, the response function linking strain to the deforming stress is the compliance tensor of the material.