- document
-
van Dooren, K.S. (author), Tijs, B.H.A.H. (author), Waleson, J. E.A. (author), Bisagni, C. (author)Two aeronautical thermoplastic composite stiffened panels are analysed and tested to investigate the buckling behaviour, the skin-stringer separation and the final failure mode. The panels are made of fast crystallising polyetherketoneketone carbon composite, have three stringers with an angled cap on one side, and are joined to the skin by a...journal article 2023
- document
-
Rudd, M.T. (author), Eberlein, David J. (author), Waters, W. Allen (author), Gardner, Nathaniel W. (author), Schultz, Marc R. (author), Bisagni, C. (author)Launch vehicle structures, such as payload adapters and interstages, are increasingly designed and constructed using composite materials due to their high stiffness- and strength-to-weight ratios. Therefore, it is important to develop a validated finite element modeling methodology for designing and analyzing composite launch-vehicle shell...journal article 2023
- document
-
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
- document
-
Paz Mendez, J. (author), Raimondo, A. (author), Bisagni, C. (author)This study aims at better understanding the damage tolerance of stiffened composite panels subjected to fatigue loads in the post-buckling regime. Ten single-stringer hat-stiffened specimens with an initial delamination between the skin and the stringer foot were manufactured, and then tested under quasi-static and fatigue loads in post...journal article 2023
- document
-
Tijs, B.H.A.H. (author), Dávila, C. G. (author), Turon, A. (author), Bisagni, C. (author)The work presented in this paper investigates the ability of continuum damage models to accurately predict matrix failure and ply splitting. Two continuum damage model approaches are implemented that use different stress–strain measures. The first approach is based on small-strain increments and the Cauchy stress, while the second approach...journal article 2023
- document
-
De Breuker, R. (author), Benedictus, R. (author), Bisagni, C. (author), Boneschansker, I. (author), Melkert, J.A. (author), Snellen, M. (author), Veldhuis, L.L.M. (author), Verdegaal, F.M. (author), Visser, P.N.A.M. (author), Werij, H.G.C. (author)The Faculty of Aerospace Engineering is one of eight faculties at Delft University of Technology. It is one of the most comprehensive academic and innovation communities worldwide focusing on aerospace engineering. Its 120 professors and 70 researchers are mentoring and teaching around 2,800 BSc/MSc students and more than 350 PhD candidates...journal article 2022
- document
-
Gutierrez Alvarez, J. (author), Bisagni, C. (author)This paper presents an experimental and numerical study of composite plates, analyzing the interaction between mechanical and thermal loads related to buckling and the occurrence of mode jumping. A novel experimental setup for thermomechanical testing was developed. The setup is conceived around a frame with a low coefficient of thermal...journal article 2022
- document
-
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
- document
-
Álvarez, J. G. (author), Abramovich, Haim (author), Bisagni, C. (author)This paper presents an experimental investigation on vibrations of heated composite plates leading to thermal buckling. The tests were performed considering two main goals: the application of the Vibration Correlation Technique for the detection of thermal buckling in composite plates; and the exploration of the frequency variations before...journal article 2022
- document
-
Bisagni, C. (author), Raimondo, A. (author), Atanasovska, I. (author), Milic, M. (author), Troian, R. (author), Frulla, G. (author), Polla, A. (author), Cora, N. (author), Bekci, M. L. (author)In this paper, a comparison between six finite element models of a representative wing structural component performed in the context of Optimised Design for Inspection (ODIN) project of the European Cooperation in Science and Technology (COST) is presented. Six partners from six different countries involved in the project received the drawing...journal article 2022
- document
-
Raimondo, A. (author), Dávila, Carlos G. (author), Bisagni, C. (author)This paper evaluates the capabilities of the recently developed CF20 cohesive fatigue model, which can predict crack initiation as well as the rates of crack propagation by relying on intrinsic relationships between a stress-life diagram and its corresponding Paris law. The model is validated here using a partially reinforced double...journal article 2022
- document
-
Tijs, B.H.A.H. (author), Doldersum, M.H.J. (author), Turon, A. (author), Waleson, J. E.A. (author), Bisagni, C. (author)The capability of joining two thermoplastic composite parts by welding is a key technology to reduce the weight and cost of assembled parts and enables high volume manufacturing of future aeronautical structures made of thermoplastic composite materials. However, there is not much experimental understanding of the mechanisms involving welded...journal article 2022
- document
-
Tijs, B.H.A.H. (author), Abdel-Monsef, S. (author), Renart, J. (author), Turon, A. (author), Bisagni, C. (author)Thermoplastic composites can enable the development of new manufacturing techniques to make the aviation industry more sustainable while at the same time greatly benefit cost-efficient and high-volume production. One of the thermoplastic composite materials that can enable this transition is AS4D/PEKK-FC. In this work, the interlaminar...journal article 2022
- document
-
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
- document
-
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
- document
-
Zhang, J. (author), Bisagni, C. (author)This study aims to design novel tailorable and effective mechanisms by controlling buckling behaviour in structural elements of a composite wing for future morphing application. Instead of the traditional design against buckling, the idea is to embrace this built-in instability by using the nonlinear post-buckling response to control...journal article 2021
- document
-
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
- document
-
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
- document
-
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
- document
-
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