研究目的
To rigorously simulate the thermal pulsing process for NDT of electrofusion PE joints, determine the appropriate pulsing durations at different initial temperatures, and screen a contaminated joint nondestructively.
研究成果
The study successfully simulated the thermal pulsing process for NDT of electrofusion PE joints with less than 0.27% mean relative prediction error. It determined the pulsing duration at different initial temperatures and screened a contaminated joint nondestructively. The simulation provides a versatile reference tool for predicting the thermal behavior of faultless joints at different conditions, reducing the costs of preparing experimental reference thermal images.
研究不足
The study assumes the coupler is fault-less and the ambient temperature remains constant during the pulsing process. The simulation's accuracy depends on the exact trajectory of the internal wire, which may have minor displacements and misalignments.
1：Experimental Design and Method Selection:
The study involves simulating the thermal behavior of a fault-less, 63 PE joint subjected to a controlled heat pulse. The simulation is validated experimentally.
2：Sample Selection and Data Sources:
PE100 high density polyethylene pipe and coupler, electrofusion machine, IR thermal camera, power quality clamp meter, digital Vernier caliper, and talc powder for contamination.
3：List of Experimental Equipment and Materials:
Pars Ethylene Kish Co PE pipe, PE100 Petro Gas Pars coupler, Parsfusion electrofusion machine, Fluke Ti32 infrared camera, Fluke 345 power quality clamp meter, Mitutoyo 500-193 Absolute Digital Caliper.
4：Experimental Procedures and Operational Workflow:
The joint is exposed to a thermal pulse, and the thermal response is recorded. The simulation is used to predict the thermal behavior and validate the experimental results.
5：Data Analysis Methods:
The simulation results are compared with experimental thermal images to validate the accuracy of the model.
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