Long-term creep behavior prediction of composite pipes subjected to humid environments

The study of long-term creep behavior of composite pipes is an important industrial problem. Most previous studies include experimental work that is reliable but has the disadvantage of being both time-consuming and costly. The primary purpose of this study is to model the long-term creep behavior of composite pipes considering moisture. In this research, a comprehensive approach is provided, relying on available short-term creep experimental data on the pure resin to predict the long-term behavior of each type of composite, particularly composite pipes. By employing Python script, the high-level algorithm is developed to model the creep behavior of lamina by using the micromechanics theories. The effect of stress on the viscoelastic behavior of laminae is modeled. Results show that moisture decreases the lifetime of composite pipes. For one year, estimation of failure pressure is acquired with ۱.۷% error in comparison with the available experimental data