...Payman Sahbah Ahmed; Ava Ali Kamal; Niveen Jamal Abdulkader; Basim Mohammed Fadhil; Fuad Khoshnaw Purpose Pipelines are subject to pits, holes and cracks after staying in service for a while, especially in harsh environments. To repair the pipelines, composite materials are used, due to composite...

...Bakhtiyar Khudayarov; Fozilzhon Turaev Purpose The purpose of this study is to create a mathematical model, a numerical algorithm and a computer program for studying the vibration of composite pipelines based on the theory of beams used in the oil and gas industry, agriculture and water management...