Effect of temperature on tensile and creep‐recovery properties of braided polyester harness cord

Abstract

Tensile and creep‐recovery properties of braided polyester (PET) harness cord under various temperature and tension were studied by using an Instron universal tester. The study reveals that the tensile properties are highly related to the temperature, with a decrease of 29.6, 50.0, and 33.8% in initial modulus, yield force, and breaking force (BF), respectively, as increasing the temperature from 25 to 100 °C. Under the condition of 5% BF, the creep and recovery strain of harness cord increased by 185.7 and 353.8% separately, when the temperature increased from 40 to 100 °C, indicating the significant effect of temperature and tension on the creep‐recovery properties. The similar tendencies were also observed under the conditions of 10 and 15% BF. These results could be well described by Burgers four‐element model. During the 1.5 h creep test, only instant elastic and retarded elastic deformation could be observed and accounting for 56.1–84.3% and 15.2–43.4% of the total creep deformation, respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47864.

A general fractional model of creep response for polymer materials: Simulation and model comparison

“…In order to test the accuracy and feasibility of proposed fractional creep model, M2 is selected for comparison. Creep test results of polyester (PET) harness cord 32 are adopted for the simulation firstly, in which the uniaxial creep tests at 40, 60, 80, and 100°C are conducted by using the universal tester model 5967. And the given stress applied on the samples were 5% and 10% of breaking force (BF) with 10 MPa and 20 MPa, respectively.…”

“…Prediction comparison between M1 and M2, compared to the creep results of polyester (PET) harness cord at elevated temperature levels (40, 60, 80, and 100°C), (a) 10 MPa; (b) 20 MPa. The experimental data were extracted from 32 [Color figure can be viewed at wileyonlinelibrary.com]…”