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Chapter 3: Viscoelasticity

The chapter discusses how viscoelastic materials experience a time-dependent increase in strain when subjected to a constant stress known as viscoelastic creep. It explains that viscoelastic liquids will ultimately fail under stress while solids may or may not depending on the applied stress versus their ultimate resistance. The chapter also describes how materials undergo an initial strain until a time after which the strain immediately decreases then gradually decreases to a residual strain, when stressed for a shorter time period.

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107 views11 pages

Chapter 3: Viscoelasticity

The chapter discusses how viscoelastic materials experience a time-dependent increase in strain when subjected to a constant stress known as viscoelastic creep. It explains that viscoelastic liquids will ultimately fail under stress while solids may or may not depending on the applied stress versus their ultimate resistance. The chapter also describes how materials undergo an initial strain until a time after which the strain immediately decreases then gradually decreases to a residual strain, when stressed for a shorter time period.

Uploaded by

HARIMETLY
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© © All Rights Reserved
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CHAPTER 3: VISCOELASTICITY

When subjected to a step constant stress, viscoelastic


materials experience a time-dependent increase in strain.
This phenomenon is known as viscoelastic creep.
At a time , a viscoelastic material is loaded with a
constant stress that is maintained for a sufficiently long
time period. The material responds to the stress with a
strain that increases until the material ultimately fails, if it is
a viscoelastic liquid. If, on the other hand, it is a
viscoelastic solid, it may or may not fail depending on the
applied stress versus the material's ultimate resistance.
When the stress is maintained for a shorter time period, the
material undergoes an initial strain until a time , after which
the strain immediately decreases (discontinuity) then
gradually decreases at times t>t1 to a residual strain.
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY
CHAPTER 3: VISCOELASTICITY

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