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Schiller, A. (author), Bisagni, C. (author)Cylindrical shells are common structural elements in the aerospace sector due to their high load-carrying capacity per unit weight. Cutouts may, however, significantly reduce this load-carrying capacity, especially when cylindrical shells buckle under axial compression. Since the buckling load is often a crucial design parameter, it is important...conference paper 2022
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Pareyns, K. (author), Bisagni, C. (author), Rudd, M.T. (author), Schultz, Marc R. (author)Conical shells are commonly used as structural components for launch vehicles. The axial compression experienced during launch is one of the sizing load cases, because it can lead to loss of structural stability. Because experimentally testing these full-scale structures is cumbersome and expensive, it is expedient to understand how reduced...conference paper 2021
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van Dooren, K.S. (author), Bisagni, C. (author)The Clean Sky 2 “SmarT mUlti-fuNctioNal and INtegrated TP fuselaGe" STUNNING project focusses on the next generation composite fuselage with emphasis on manufacturing techniques such as thermoplastic welding. Welded multi-stringer panels are investigated in this paper, with emphasis on the buckling and skin-stringer separation behavior. The...conference paper 2021
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Raimondo, A. (author), Paz Mendez, J. (author), Bisagni, C. (author)The fatigue damage tolerance of a composite stiffened structure in post-buckling conditions is experimentally investigated in this work. Single-stringer specimens with an initial delamination, artificially created during the manufacturing process, are tested under cyclic compressive load. Six nominally identical specimens are manufactured: two...conference paper 2021
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Pitton, Stefano (author), Ricci, S (author), Bisagni, C. (author)The main driver of aerospace structures design is the increase in performances of currently in use components. The behavior of structures is investigated by means of highly accurate finite elements (FE) analysis. The problem related to this kind of simulations is the high computational time required to obtain the structural response associated...conference paper 2019
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Subramanian, N. (author), Bisagni, C. (author)The effectiveness of carbonaceous nanoparticles in arresting and delaying damage in nanocomposites has been attributed to multiscale toughening mechanisms. To explore their application in joined interfaces of composites, this study investigates the use of carbon nanotube (CNT) interleaved films for co-cured joining of composite parts and their...conference paper 2022
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Maierhofer, Thomas, (author), Loukaidesa, Evripides G. (author), Hernandez, Thibault (author), Carrc, Craig (author), Bisagni, C. (author), Butler, Richard, (author)Modern aerospace structures see increasing use of combinations of thermoplastic and thermoset composite components, requiring the development of efficient joining methods for dissimilar matrix materials. This study aimed to investigate the Mode I fracture toughness and performance of resistance-welded and co-bonded thermoset-thermoplastic...conference paper 2022
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Rudd, Michelle Tillotson (author), Schultz, Marc R. (author), Gardner, Nathaniel W. (author), Kosztowny, Cyrus J. R. (author), Bisagni, C. (author)Launch-vehicle shell structures, which can be comprised of both cylindrical and conical sections, are known to be susceptible to buckling due to their large radius-to-thickness ratios. The advancements in composite manufacturing and numerical methods have enabled designers to consider more nontraditional shapes, such as connecting the conical...conference paper 2023
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Tijs, B.H.A.H. (author), van Dooren, K.S. (author), Bisagni, C. (author)This work summarizes the recent developments of a numerical framework to predict the mechanical behaviour of thermoplastic composites. It supports the design of a next generation thermoplastic multi-functional fuselage which uses advanced joining techniques such as thermoplastic welding to reduce both weight and cost by limiting the amount of...conference paper 2020
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Zaczynska, Monika (author), Abramovich, H. (author), Bisagni, C. (author)The present study investigates the behaviour of a CFRP cylindrical shell under compressive pulse loading. The in-pulse analyses are performed numerically, using the finite element code ABAQUS. The dynamic buckling load is determined using the Budiansky & Hutchinson criterion. Parameters like the shape of pulse loading and pulse duration were...conference paper 2021
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Kootte, Lucas (author), Bisagni, C. (author), Ranatunga, Vipul (author), Clay, Stephen B. (author), Dávila, Carlos G. (author), Rose, Cheryl (author)To design aeronautical composite multi-stringer panels that can safely operate in a postbuckled state, it is important to identify the parameters that can influence the different modes in which skin-stringer separation might occur. A methodology is under development to study the interaction between the skin-stringer separation and the...conference paper 2021
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Rudd, Michelle Tillotson (author), Schultz, Marc R. (author), Waters, W. Allen (author), Gardner, Nathaniel W. (author), Bisagni, C. (author)A subscale solid laminate composite cylinder with a 31.5-in. diameter, a 48.2-in. length, and a [23/0/-23]4S layup was designated NDL-1 and was designed to fail in buckling after a series of subcritical tests. NDL-1 was experimentally loaded in axial compression until buckling at 466.3 kips. Visual inspection of the test article after the test...conference paper 2021
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Kootte, Lucas (author), Bisagni, C. (author), Davila, Carlos (author), Ranatunga, Vipul (author)Aeronautical composite stiffened structures have the capability to carry loads deep into postbuckling, yet they are typically designed to operate below the buckling load to avoid potential issues with durability and structural integrity. Large out-of-plane postbuckling deformation of the skin can result in the opening of the skin-stringer...conference paper 2018
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Gutierrez Alvarez, J. (author), Bisagni, C. (author)A closed-form solution is proposed for determining the buckling of composite plates under combined thermal-mechanical loading. The plates are subjected to a constant temperature increment, combined with applied displacement, while transversal in-plane expansion is restricted. The plates are studied using Von Kármán equations in combination with...conference paper 2018
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Tijs, B.H.A.H. (author), Lopes, CS (author), Turon, A. (author), Bisagni, C. (author), Waleson, J. (author), van Ingen, J.W. (author), Veldman, S.L. (author)This paper summarizes the implementation of a Virtual Testing methodology in an industrial environment to predict the mechanical behaviour of composite material through the different scales of the conventional physical testing pyramid. A robust Virtual Test Lab allows for the generation of virtual allowables, while advanced interface models...conference paper 2018
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Labans, E. (author), Bisagni, C. (author)The ability to steer the carbon fibre tape, varying the tow angle can open new designs of cylindrical shells – the main structural component of the space launcher vehicles. This research presents experimental and numerical investigation of two carbon-epoxy cylindrical shells – a cylinder with conventional layup made of unidirectional prepreg and...conference paper 2018
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Davila, CG (author), Bisagni, C. (author)The fatigue life of composite stiffened panels with indentation damage was investigated experimentally using single stringer compression specimens. Indentation damage was induced on one of the two flanges of the stringer. The experiments were conducted using advanced instrumentation, including digital image correlation, passive thermography, and...conference paper 2016
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Gavioli, M. (author), Klaassen, R.G. (author), den Brok, Perry (author), Bisagni, C. (author)Structural Mechanics (SM) is a fundamental subject in engineering bachelor curricula. Since experimental investigations play a central role in the discipline, laboratory practice is often present in SM courses. Many instructors recognize in laboratory activities, not only a way to develop laboratory skills and appreciation of the scientific...conference paper 2020
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Bisagni, C. (author)The results of buckling tests performed during the project DESICOS funded by the European Commission in the FP7 Programme are here presented. The tested structures are sandwich cylindrical shells that consist of reduced models of a component of the Ariane 5 launcher: the Dual Launch System. In particular, the scaled component is studied with and...conference paper 2016
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Bronstein, M (author), Feldman, E (author), Vescovini, R (author), Bisagni, C. (author)The daedalos project was supported by the european commission under the programme transport (including aeronautics) of the 7th framework programme for research and technological development, grant agreement no: 266411. Daedalos stands for dynamics in aircraft engineering design and analysis for light optimized structures The primary objective of...conference paper 2016