Deterministic Analysis for Creep Behavior of Damaged Composite Tubular Structure
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TECHNICAL ARTICLE—PEER-REVIEWED
Deterministic Analysis for Creep Behavior of Damaged Composite Tubular Structure Abdelkader Hocine . Abdelhakim Maizia . Abdelhamid Ghouaoula . Joa˜o Eduardo Pinto Castro Ribeiro
Submitted: 27 May 2020 ASM International 2020
Abstract The aim of this paper is to study the effect of creep loading on damaged multilayered composite cylindrical structure, taking into account various damage rates by developing analytical model. The developed model is used to simulate the elasto-visco-plastic response of damage cylindrical composite structure under different types of loading such as tension and internal pressure with end effect. This model makes it possible to estimate the service life of the multilayed damaged structures subjected to a creep loading. The results obtained make and show that the presence of the damage within the multilayer structures causes a clear increase of the circumferential stress which is the only responsible of the ruin, where some results are compared with experimental testing from previous works and a good correlation is obtained.
Introduction The use of fiber-reinforced polymeric composites materials has become a current practice in gas transport and storage cylindrical structures due to their lightweight, relative low cost and mainly their high strength over metallic materials, although these composites structures performances may A. Hocine (&) A. Maizia A. Ghouaoula Laboratory of Control, Testing, Measurement and Mechanical Simulation, Hassiba Benbouali University of Chlef, Ouled Fares, Algeria e-mail: [email protected] J. E. P. C. Ribeiro Department of Mechanical Technology, Polytechnic Institute of Braganc¸a, Braganc¸a, Portugal
decay significantly over time. This is mainly due to the viscoelastic nature of the matrix, damage accumulation and propagation within the matrix and fiber breaking. One serious consequence, as a result of static fatigue (creep failure), is a premature failure which is usually catastrophic [1]. The static fatigue or creep failure is the tendency of materials to deform when subjected to long-term stress, particularly when exposed to heat, causing damage which may progress to failure in composite pressure vessels type III or IV and pipelines reinforced by composite system, in order to predict a failure pressure [2–4]. Most researchers conducted deterministic studies to analyze the composites cylindrical structures behavior under various loads. However, some of them used statistical models to describe the failure process, but neglect the randomness in mechanical properties, winding angle, loading and geometrical parameters. Different research works focus on the development of a reliability design tool of composites tubular structures under creep and fatigue loading with the physical, mechanical properties of materials, based on the theory of elasticity, which is relevant tool for such structure design. Before performing a structure optimization, a stress and strain analysis is required in order to get a reliable and econom
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