experimental considerations in the measurement of thermal relaxation and recovery of strained seals
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Experimental Considerations in the Measurement of Thermal Relaxation and Recovery of Strained Seals. Kurt Miller Axel Products, Inc. www.axelproducts.com. Available at: www.axelproducts.com. Overview. Elastomer Seals Stress, Strain and Temperature A Particular Experiment.

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experimental considerations in the measurement of thermal relaxation and recovery of strained seals

Experimental Considerations in the Measurement of Thermal Relaxation and Recovery of Strained Seals

Kurt Miller

Axel Products, Inc.

www.axelproducts.com

overview
Overview
  • Elastomer Seals
  • Stress, Strain and Temperature
  • A Particular Experiment
elastomer seals
Elastomer Seals
  • Normally Compressed
  • Fill a Space
  • Provide a Reaction Force
  • Survive Temperature Changes
  • Survive Chemical Attack
slide5

Stress, Strain and Temperature

  • Mental Experiment
  • Actual Experiment
stress strain and temperature7
Stress, Strain and Temperature
  • Short Term Stress Relaxation
  • Some Softening
stress strain and temperature9
Stress, Strain and Temperature
  • Thermal Expansion
    • Elastomer > Steel
  • Thermal Softening
  • Thermal Degradation
  • Additional Crosslinking
stress strain and temperature10
Stress, Strain and Temperature
  • Thermal Expansion vs Thermal Softening
stress strain and temperature11
Stress, Strain and Temperature
  • NOT Long Term Stress Relaxation
stress strain and temperature13
Stress, Strain and Temperature
  • Thermal Contraction
  • Reduced Reaction Force
stress strain and temperature15
Stress, Strain and Temperature
  • Additional Thermal Contraction
  • Reduced or Possible Loss of Reaction Force
  • The Seal May go into Tension!
a particular experiment18
A Particular Experiment
  • Example Data, Constrained Seal
a particular experiment19
A Particular Experiment
  • Example Data, Constrained Seal
a particular experiment20
A Particular Experiment
  • This does not replace aging experiments.
a particular experiment21
A Particular Experiment
  • This does not replace aging experiments.
a particular experiment22
A Particular Experiment
  • This does not replace:
    • Thermal Expansion by TMA
    • Compression Set
overview23
Overview
  • Bad Things Happen When Hot,

Become Evident When Cold

  • Experimental data is Helpful
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