Application of Taguchi Method to Optimization Design of Effective Parameters of Composite Pipes under Low Velocity Impact in Different Temperature Conditions

Due to the development of using composite pipes and fittings in transmission lines and refineries of petrochemical and gas industries, knowledge of mechanical behavior and their optimal design in working conditions is essential. In this study, by using the Taguchi experimental design method, a numerical model is presented to investigate the behavior of composite pipes, made of glass fibers and different resins, against impact loads due to drop weight at different operating temperatures. The pipes are produced with three types of epoxy resins, vinyl ester and polyester and have been tested in the temperature range of -15o C to 100 °C. In order to evaluate the model, the results of the numerical model in different cases are compared with experimental ones and the effect of each of the control factors on the mechanical response of the pipe is evaluated. The results show that the pipe with epoxy resin and temperature of 100 °C has the best performance against impact load and also with increasing ambient temperature, the load carrying capacity of the pipe decreases and the impact time of the impactor increases.