Publications Internationales

Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/13

Browse

Author: search.filters.author.Belaidi, IdirSubject: search.filters.subject.Optimization

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Strength prediction of a steel pipe having a hemi-ellipsoidal corrosion defect repaired by GFRP composite patch using artificial neural network
    (Elsevier, 2023) Oulad Brahim, Abdelmoumin; Belaidi, Idir; Khatir, Samir; Le Thanh, Coung; Mirjalili, Seyedali; Magd, Abdel Wahab
    Local stress concentration occurs when faults are present in pipelines under pressure. An example of such defects is the problem of corrosion caused by the environment in the field of pipeline installation. In the first part of this paper, we attempt to model the corrosion in the hemi-ellipsoidal form in order to study the locations of stress concentration in the specimens by several experimental cases and their influence on the stress resistance. The Gurson-Tvergaard-Needleman (GTN) mesoscopic damage model is used to simulate the specimens with good accuracy. In the second part, the investigation is extended to a pipe under static pressure with and without the presence of a glass fibre reinforced polymer (GFRP) composite patch. The maximum stress and percent stress reduction in a defected pipe with a hemi-ellipsoidal defect are determined using a 3D finite element model. This part examines the impact of the geometry of the composite patches on the percentage reduction of the maximum stresses in a section of pipeline subjected to static pressure. In the third part, the stresses and the percentage reduction in the maximum stresses are predicted using an artificial neural network (ANN). An inverse problem using ANN and Jaya algorithm is proposed to predict the group level of different sizes of defects under composite patches based on the maximum stress and percentage reduction of stress that the pipe withstands. The new method relates directly to real-world pipeline construction and repair applications. It could be also used for structural safety monitoring
  • No Thumbnail Available
    Item
    Efficiency of bio- and socio-inspired optimization algorithms for axial turbomachinery design
    (Elsevier, 2017) Ait Chikh, Mohamed Abdessamad; Belaidi, Idir; Khelladi, Sofiane; Paris, José; Deligant, Michael; Bakir, Farid
  • No Thumbnail Available
    Item
    Analysis of modular fixtures design
    (Mecanique et Industries, 2007) Zirmi, S.; Paris, H.; Belaidi, Idir
    A fixture is essential equipment to firmly fix the part at the good position in the workspace of the machine tool. The design of the fixture plays an important part to obtain a machined part of good quality. We already formalized knowledge on the fixturing so as to be able to manage them throughout process planning design. Now we are interested in the design of the fixture so as to pass from the fixturing model to the technological solution which will be used on the machine tool. This paper deals with the problem of modular fixture design with a technological point of view. The choice and the placement of element are carried out in taking account of all the constraints: quality, accessibility and mechanical behaviour of the system part fixture cutting tool during the machining.