Searched for: subject:"buckling"
(1 - 20 of 60)

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Wang, Z. (author), Almeida, José Humberto S. (author), St-Pierre, Luc (author), Wang, Zhonglai (author), Castro, Saullo G.P. (author)
A reliability-based optimization framework is introduced and used to design filament-wound cylindrical shells with variable angle tow. Seven design cases are investigated to enable a comparison between constant-stiffness and variable angle tow designs, also considering effects of thickness variation created due to overlapping tow paths,...
journal article 2020
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Raimondo, A. (author), Bisagni, C. (author)
The fatigue life prediction of post-buckled composite structures represents still an unresolved issue due to the complexity of the phenomenon and the high costs of experimental testing. In this paper, a novel numerical approach, called “Min-Max Load Approach”, is used to analyze the behavior of a composite single-stringer specimen with an...
journal article 2020
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Schadt, F. (author), Rueppel, M. (author), Brauner, C. (author), Courvoisier, Y. (author), Masania, K. (author), Dransfeld, C.A. (author)
Passive spanwise bending shape-adaption has the potential to increase the efficiency and manoeuvrability of vehicles with wing-like structures. By utilisation of compression flange buckling, the in-plane stiffness can be tuned to design beams with contrasting pre-buckling and post-buckling bending stiffness. The investigated concept is...
journal article 2020
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Zucco, G. (author), Oliveri, V. (author), Rouhi, M. (author), Telford, R. (author), Clancy, G. (author), McHale, C. (author), O'Higgins, R. (author), Young, T. M. (author), Weaver, P. M. (author), Peeters, D.M.J. (author)
Automated manufacturing of thermoplastic composites has found increased interest in aerospace applications over the past three decades because of its great potential in low-cost, high rate, repeatable production of high performance composite structures. Experimental validation is a key element in the development of structures made using this...
journal article 2020
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Xia, Jingmin (author), Farrell, Patrick E. (author), Castro, Saullo G.P. (author)
When loading experiments are repeated on different samples, qualitatively different results can occur. This is due to factors such as geometric imperfections, load asymmetries, unevenly stressed regions or uneven material distributions created by manufacturing processes. This fact makes designing robust thin-walled structures difficult. One...
journal article 2020
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Raimondo, A. (author), Doesburg, S.A. (author), Bisagni, C. (author)
In this work, an approach based on the Virtual Crack Closure Technique, included in the commercial finite element code ABAQUS, is adopted to study the propagation of delamination in composite structures under quasi-static and fatigue loads. The methodology, originally capable of simulating only delamination under quasi-static loads, has...
journal article 2020
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Nijgh, M.P. (author), Veljkovic, M. (author)
Demountable and reusable composite floor systems enable the decoupling between the use of construction materials and economic activity, and hereby contribute to the sustainability of the built environment. Efficient material use through optimised cross-section design reduces construction material demand. Demountable steel-concrete composite...
journal article 2020
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Chang, Z. (author), Schlangen, E. (author), Šavija, B. (author)
This paper reports an extended lattice model for printing process simulation of 3D printed cementitious materials. In this model, several influencing factors such as material and geometric nonlinearity are considered. Using this model, green strength of cementitious material is investigated, deformation and crack pattern can be derived, which...
book chapter 2020
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Broeren, F.G.J. (author), van der Wijk, V. (author), Herder, J.L. (author)
In this paper, a pseudo-rigid body model is proposed for the analysis of a spatial mechanical metamaterial and its application is demonstrated. Using this model, the post-buckling behavior of the mechanical metamaterial can be determined without the need to consider the whole elastic structure, e.g., using finite-element procedures. This is done...
journal article 2020
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Labans, E. (author), Bisagni, C. (author)
The ability to steer carbon fibre tapes, varying the tow angle, can widen the designs possibilities of cylindrical shells that are one of the main components of aerospace structures. This research presents experimental and numerical investigation of two carbon fibre reinforced plastic cylindrical shells – a cylinder with conventional layup made...
journal article 2019
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Castro, Saullo G.P. (author), Donadon, Maurício V. (author), Guimarães, Thiago A.M. (author)
The increasing need for automatic mesh generation has led to the development of efficient triangulation algorithms that are able to discretize any 2D or 3D domain. Modern finite element formulations based on strain smoothing techniques (SFEM) provide enhanced convergence properties, preventing yet the stiffening behavior of triangular meshes....
journal article 2019
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Sakes, A. (author), Grandia, Leander (author), Lether, Remie (author), Steenstra, Lukas (author), Valentijn, Maurice C. (author), Breedveld, P. (author), Spronck, J.W. (author)
A major challenge during minimally invasive surgery is transfer of high forces through small, flexible instruments, such as needles and catheters, because of their low buckling resistance. In this study, we determined the feasibility of using a Newton's Cradle-inspired catheter (patented) to transfer high-force impulses. Exerting a high-force...
journal article 2019
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van Dooren, K.S. (author), Labans, E. (author), Tijs, B.H.A.H. (author), Bisagni, C. (author), Waleson, J. (author)
This paper focuses on a novel numerical formulation based on cohesive elements and S-N diagram to simulate fatigue-driven delamination in composite laminates. The constitutive model adopts a two-parameters heuristic equation, which coefficients are evaluated using an idealization of the S-N diagram rather than the more commonly used Paris law....
conference paper 2019
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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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Moors, Gunther (author), Kassapoglou, C. (author), de Almeida, Sergio Frascino Müller (author), Ferreira, Clovis Augusto Eça (author)
A process to efficiently design composite wing boxes is presented. It uses analytical and semi-empirical equations for failure modes such as material strength, plate buckling, stiffener column buckling and stiffener flange or web crippling. Laminate layups for the different components are selected in accordance with basic engineering rules...
journal article 2019
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Cerkvenik, U. (author), Dodou, D. (author), van Leeuwen, Johan L. (author), Gussekloo, Sander W.S. (author)
Hemipterans, mosquitoes, and parasitic wasps probe in a variety of substrates to find hosts for their larvae or food sources. Probes capable of sensing and precise steering enable insects to navigate through solid substrates without visual information and to reach targets that are hidden deep inside the substrate. The probes belong to non...
journal article 2019
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Zhi, Jie (author), Chen, B. Y. (author), Tay, Tong Earn (author)
In this paper, the recently-developed floating node method is extended for damage analysis of laminated composites with large deformations. Strong discontinuities including interfacial delamination and matrix cracks are explicitly represented by geometrically nonlinear kinematics. Interactions between these two kinds of failure patterns are...
journal article 2018
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Sobhani, Anvar (author), Saeedifar, M. (author), Najafabadi, Mehdi Ahmadi (author), Fotouhi, Mohamad (author), Zarouchas, D. (author)
This study introduces a comprehensive set of designed and tested glass/epoxy composites, AE monitoring and signal processing techniques; (i) to investigate the effect of multiple delaminations on buckling and post-buckling behaviors of laminated composites and (ii) to evaluate Acoustic Emission (AE) technique ability to monitor the buckling...
journal article 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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Lottman, B.B.G. (author)
--- ENGLISH VERSION --- The spalling damage observed to concrete structures after severe fire exposure has been the topic of scientific research for the past decades. This phenomenon is commonly characterised by the sudden and in some cases violent breaking off of concrete pieces from the cross-section. In this thesis the derivation and the...
doctoral thesis 2017
Searched for: subject:"buckling"
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