DYN AMIC MECHANICAL AN ALYSIS
I
TESTING MODES & APPLICATIONS
Step Tests: Creep and Stress Relaxation
Step Tests, including Stress Relaxation and Creep Recovery, are so-named because the sample deformation or stress is applied in a step fashion. Both are highly sensitive tests for
measuring viscoelastic properties of materials. In creep and recovery, a constant stress is applied to the sample at tl and the resulting strain is measured over time. At t2 the stress is
removed and the recovery (recoil) strain is measured. The creep compliance, D(t), is calculated from the stress and time-dependent strain. In stress relaxation, an instantaneous strain
is applied to the sample and held constant. The resulting stress decay is measured as a function of time yielding relaxation modulus E(t) or G(t).
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Creep and Recovery
D
(t)
=
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(t)/o
Time
Testing Modes and Applications
22
Stress Relaxation
E
(t)
=
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(t)/E
Time
Summary of Contents for RSA-G2
Page 1: ......
Page 9: ...Forced Convection Oven with tension clamp Technology 8...
Page 13: ...IMMERSION TESTING I CLAMPING SYSTEMS...
Page 15: ...DETA I DIELECTRIC THERMAL ANALYSIS ACCESSORY DETA...
Page 29: ...tainstruments com 2019 TA Instruments All rights reserved L50027 001...
Page 30: ...Verso Filler Page z z...
Page 31: ...n getting Started guide Revision D Issued July 2022...
Page 99: ...Issued November 2013 Supplement to Getting Started Guide TA Instruments Manual Supplement...
Page 100: ...Page 2 TA Instruments Manual Supplement This page is intentionally blank...
Page 113: ...Page 1 Page 1 RSA G2 Solids Analyzer Revision G Issued May 2022 Site Preparation Guide...