Mechanical Engineering

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Mechanical Engineering

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Author: search.filters.author.O. AdedipeStart date: 2020

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    Investigation of Fracture behaviour of API X70 Pipeline Steel
    (IOP Publishing Ltd, 2021) M.S. Egene; O. Adedipe; U..G. Okoro; K.T. Obanimomo
    Oil and gas production has significantly increased over the years in order to meet future demands for oil and gas products, regardless of the unstable price being experienced by producing nations. The use of pipelines for the transportation of these products has been the globally recognized solution. These pipelines are fabricated by welding and their fracture properties depend on a number of factors which include temperature, particularly for pipelines operating in cold environment such as deeper water depths. Therefore, information of fracture behaviour of welded pipelines located in cold regions is therefore important for reliable design for service. In this paper, fracture behaviour of welded x70 pipeline steel was investigated using charpy v-notch specimens. Impact tests were carried out on weld and parent materials at temperatures -10°C, -20°C, -40°C, -60°C, -80°C, -100°C, -120°C, -160°C, 0°C, 10°C and 20°C. Results revealed that higher energy was absorbed in the weld than in parent materials regardless of the test temperature used. results implied that the fracture behaviour of the material could be significantly influenced by temperature, welding and the notch sensitivity of the materials.
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    INVESTIGATION OF MECHANICAL PROPERTIES OF POLYPROPYLENE FILM AS VACUUM PACKAGING MATERIAL FOR DRIED FISH
    (ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY & ENVIRONMENT (AZOJETE), 2023-09) I. A. Mohammed; O. Adedipe; J. Y. Jiya; A. B. Ayuba; K. T. Obanimomo; K. C. Bala
    This study investigated the mechanical properties of three sets of polypropylene packaging films and existing dried fish packaging films and the quality of dried fish packaging in Nigeria... The polypropylene packaging films were produced in three batches A, B and C with thicknesses of 130μm, 150μm and 180μm respectively. The results showed that samples A, B and C had tensile strengths of 48N/mm2, 51.8N/mm2 and 61N/mm2 with Elongation at Break of 690.2%, 729.8% and 760% respectively. Also, the Dart Impact Strength of the samples were observed to be 191g/130μm, 208g/150μm and 231g/180μm respectively. Additionally, samples N and K (existing fish packaging films) had tensile strengths of 34.6N/mm2 and 31.2N/mm2 and Elongation at Break of 279.2% and 267.2% respectively. Furthermore, it was revealed that sample N exhibited better mechanical properties than sample K, while the produced polypropylene packaging films had the best mechanical properties among the samples tested. Using modern systems such as vacuum packaging and modified atmosphere packaging (MAP) techniques, fish packaging and storage was improved. This research is important in light of the significant increase in aquaculture activities in Nigeria due to increased fish production and government intervention in developing the sector, since it offers good moisture barrier properties, transparency and sealability with good cost efficiency and recyclability. It helps to preserve and protect the product’s quality, flavor and shelf life while providing a visually appealing package for consumers.