The application of reliability methods in the design of tophat stiffened composite panels under in-plane loading |
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| Institution: | 1. Harbin Engineering University, China;2. University of Strathclyde, UK;3. University of Southampton, UK;1. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran;2. Aerospace Engineering Department, University of Illinois, Urbana, IL 61820, United States;3. Aerospace Engineering Department, Iowa State University, Ames, IA 50011, United States;1. Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India;2. Department of Chemistry, Guru Ghasidas Vishwavidyalaya, Bilaspur, 495009, Chhattisgarh, India;3. Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;2. Department of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China;1. Polymer Science and Technology Program, Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Phuttamonthon 4 Road, Salaya, Phuttamonthon District, Nakhon Pathom 73170, Thailand;2. Rubber Technology Research Center, Faculty of Science, Mahidol University, Phuttamonthon 4 Road, Salaya, Phuttamonthon District, Nakhon Pathom 73170, Thailand;3. Center of Sustainable Energy and Green Materials, Faculty of Science, Mahidol University, Phuttamonthon 4 Road, Salaya, Phuttamonthon District, Nakhon Pathom 73170, Thailand;1. Vikram Sarabhai Space Centre, Trivandrum 695013, India;2. Mechanical and Aerospace Engineering, State University of New York, Buffalo, USA;3. Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai 600036, India |
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| Abstract: | Composite materials have been widely used in modern engineering fields such as aircraft, space and marine structures due to their high strength-to-weight and stiffness-to-weight ratios. However, structural efficiency gained through the adoption of composite materials can only be guaranteed by understanding the influence of production upon as-designed performance. In particular, topologies that are challenging to production including panels stiffened with pi or tophat stiffeners dominate many engineering applications and often observe complex loading. The design of stiffened composite panels against buckling is a key point of composite structures. While a growing number of studies are related to the reliability analysis of composites few of these relate to the local analysis of more complicated structures. Furthermore for the assessment of these structures in a design environment it is important to have models that allow the rapid assessment of the reliability of these local structures. This paper explores the use of a stochastic approach to the design of stiffened composite panels for which typical applications can be found in composite ship structures. A parametric study is conducted using Navier grillage theory and First-order Reliability Methods to investigate any detectable trend in the safety index with various design parameters. Finally, recommendations are made to provide guidance on applications. |
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| Keywords: | Tophat-stiffened Reliability based design Sensitivity |
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