Searched for: subject:"buckling"
(1 - 20 of 113)

Pages

document
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
document
Baciu, Theodor (author)
So far thermoset based composites have been used in primary aircraft structures, owing to their good performance and vast research on the subject. Recently thermoplastic based composites also gained an increased attention and there is a push towards adopting these for primary aircraft structures as well. This interest for thermoplastic...
master thesis 2020
document
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
document
Urcelay Oca, Iñigo (author)
Delamination is an important damage mechanism in composite materials. A correct prediction of its behaviour is of great importance in the design of aerospace composite structures. Nevertheless, when using simple numerical models which do not account for the delamination migrating to other interfaces or other intralaminar damage mechanisms, the...
master thesis 2020
document
Peponis, Stathis (author)
In the last decade, maintenance and adaptive reuse, of the existing building stock, have gained ground in the construction sector. For the adaptive reuse of a building, it is required to analyze, meticulously, the existing structure. Unreinforced masonry structures are indicative of the Dutch built environment. For the assessment of their...
master thesis 2020
document
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
document
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
document
Jansen, Johan (author)
When designing a construction pit adjacent to a navigation channel, the event of a ship colliding with the structure is something to take into account in the design of the pit. However, several aspects regarding ship collisions, i.e. the probability of occurrence of a collision, the magnitude of the collision force and the influence on the...
master thesis 2019
document
Vidwans, Aditya (author)
In steel structures, a lot of attention is paid to lightweight structure, i.e. reduction of dead load without compromising structural safety, integrity and performance as well as cost-effectiveness. Thanks to modern steel aluminium sandwich panel manufacturing technology a new possibility became available for lightweight structural design.The...
master thesis 2019
document
Verhoog, Thomas (author)
In this research project, an attempt is made to fuse the fields of structural mechanics and machine learning. The goal is to find out if models can be created that are capable of predicting the outcomes of (nonlinear) finite element analyses. These models are created by means of Artificial Neural Networks, which is a powerful method in the...
master thesis 2019
document
Eberlein, David (author)
Guidelines dating back 50 years, NASA SP-8007, are employed today in the design of thin-walled launch vehicle structures. Due to advances in materials, structural designs, and manufacturing techniques since the publication of SP-8007, the development of new knockdown factors for contemporary launch vehicle structures is an ongoing subject of...
master thesis 2019
document
de Jong, Sebas (author)
The main focus of this thesis is the influence of different real boundary conditions on the failure mechanism of local buckling of steel tubular piles. The research was started with the theoretical method of describing boundary condition by specifying the degrees of freedom per boundary condition. The method makes use of the radial, meridional...
master thesis 2019
document
Mohamed Gomaa Abdulfattah Tolba, Mohamed (author)
The use of fiber-reinforced composites in the aerospace industry has increased over the past couple of decades thanks to their high specific properties. Fiber-reinforced composites also enable engineers to tailor the stacking sequence to satisfy the required stiffness or strength requirements. However, locally optimizing the stacking sequence of...
master thesis 2019
document
Verhelst, Hugo (author)
With increasing attention to climate change,renewable energy generation has become a major topic for research anddevelopment. Wind and solar energy are generated on land, whereas wave, windand tidal energy generators are getting attention in the offshore domain. Anovel extension of onshore solar energy is the concept of...
master thesis 2019
document
Bresser, Djonno (author)
In the past decades, great progress has been made in analyzing lateral torsional buckling of slender beams. The phenomena has been accurately described by differential equations, closed form solutions are available for specific cases and the solution for any load and any boundary condition can be obtained by finite element analysis. Timber and...
student report 2019
document
van Gemeren, Wouter (author)
A parametric study, using the FEM-software package ABAQUS, validated on experimental results found by Abspoel, was conducted on S690 steel plate girders to address if the results of the previous researches was valid. Using a slightly different analytical model the results show the maximum web slenderness of this steel grade in both 6000 mm2 and...
master thesis 2019
document
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
document
Giovani Pereira Castro, S. (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
document
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
document
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
Searched for: subject:"buckling"
(1 - 20 of 113)

Pages