Creep of polycarbonate: Experiments and correlation with relaxation

✍ Scribed by Alexander Ya. Malkin; Albert E. Teishev; Michael A. Kutsenko

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 489 KB
• Volume: 45
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1992.070450204

✦ Synopsis

The correctness and reliability of different methods of creep function calculations from relaxation curves were investigated by the computational experiment method. It was shown that an adequate description of some initial (relaxation) curve was not sufficient for the correct determination of the proper creep function. The best results can be achieved by the method of expansion of a relaxation curve into the discrete sum of exponents; some other procedures of analytical approximation of relaxation curves can lead to considerable unexpected errors in calculated creep functions.

The experiments were done with polycarbonate (PC) in the linear stress range and also at high stresses. The limits of linear viscoelastic behavior were determined.