FRACTOGRAPHY APPLIED TO POLYMERIC MATERIALS. PART 9: CREEP AND RUPTURE ANALYSIS

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Authors
  1. Chan, P.
  2. Mitchell, A.B.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Research and Productivity Council, Fredericton NB (CAN)
Abstract
Various empirical mathematical functions have been suggested for modelling the creep behaviour of polymers and for extrapolating the results of short term tests to predict long term creep. In the present study, selected functions have been applied to creep data previously obtained at 25C for the polymethyl methacrylate (PMMA), polyvinylchloride (PVC) and polyethylene (PE) and their applicability assessed. Non-linear regression analysis was used to demonstrate that polynomial and parabolic functions gave the best overall fit for modelling PMMA creep behaviour, parabolic and exponential functions for PVC creep behaviour and parabolic and polynomial-logarithmic functions for PE creep behaviour. The time-stress superposition principle was used to construct master curves for the secondary creep of all three polymers. TRUNCATED
Report Number
DREA-CR-91-470 — Contractor Report
Date of publication
15 Oct 1991
Number of Pages
70
DSTKIM No
92-02362
CANDIS No
108614
Format(s):
Electronic Document(PDF)

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