Analysis of relaxation time spectrum of PVC coated membrane

doi:10.19936/j.cnki.2096-8000.20211128.003

Abstract

Abstract: To further study stress relaxation characteristics in theory, the generalized Maxwell models were employed to simulate the measured stress relaxation modulus of Polyvinyl chloride (PVC) coated membrane, and the approximate solutions of relaxation time spectrum were obtained based on second-order approximation method. Meanwhile, the effect of unit numbers in generalized Maxwell model on fitting accuracy and relaxation time spectrum characteristics were also compared and analyzed. The results show that increasing unit number in generalized Maxwell model, is beneficial to improve fitted accuracy of generalized Maxwell model, and also detailed describe the relaxation time spectrum characteristics, but it will increase the difficulty of model solving. For the PVC coated membrane selected in this work, the stress relaxation behavior can be better described by generalized Maxwell models with 5 Maxwell units, while it is more reasonable to solve approximate solutions of relaxation time spectrum based on generalized Maxwell model with 6 Maxwell units. The results can provide a theoretical reference for investigation on stress relaxation characteristics of such materials in the engineering field.

Key words: membrane, viscoelastic, relaxation time spectrum, general Maxwell model, composites

CLC Number:

TB332

WANG Ze-xing, LI Shuai, TAN Dong-yi, MENG Shuo, LIU Chao. Analysis of relaxation time spectrum of PVC coated membrane[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(11): 21-25.

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