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Hofman, P. (author), Ke, L. (author), van der Meer, F.P. (author)
A common choice for multiscale modeling of the mechanical response of composites is to use periodic boundary conditions (PBCs) on square and cubical representative volume elements (RVEs). However, when strain localization occurs in the micromodel, these PBCs are unable to reproduce the transverse isotropy of composite materials with a random...
journal article 2022
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Joustra, J.J. (author), Bakker, C.A. (author), Bessai, R. (author), Balkenende, R. (author)
The design of composite products for a circular economy is challenging. Materials such as glass-fibre-reinforced plastics have long product lifetimes but are hard to recycle. For the effective reuse and recycling of products, parts, and materials, recovery strategies must be selected and implemented in the product design stage. This extends the...
journal article 2022
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Moreira Arouche, M. (author), Teixeira De Freitas, S. (author), de Barros, Silvio (author)
The goal of this paper is to evaluate the strain-based partitioning method (SBM), an analytical method based on beam analysis, for the mixed-mode fracture characterization of asymmetric cracks. The fracture energy is calculated at the crack tip of mixed-mode bending (MMB) test with asymmetric geometry and asymmetric material parameters. The...
journal article 2021
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Anisimov, A. (author), Groves, R.M. (author)
This work presents the design and the latest experimental results on the surface strain measurements during an impact event obtained with the EXTREME high-speed shearography instrument. The shearography technique is used in this project to provide a quantitative measurement of the surface strain development at the first moments of the impact...
conference paper 2019
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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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González, Sergio (author), Laera, Gianluca (author), Koussios, S. (author), Domínguez, Jaime (author), Lasagni, Fernando A. (author)
The simulation of long life behavior and environmental aging effects on composite materials are subjects of investigation for future aerospace applications (i.e. supersonic commercial aircrafts). Temperature variation in addition to matrix oxidation involves material degradation and loss of mechanical properties. Crack initiation and growth...
review 2018
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Loutas, T. (author), Eleftheroglou, N. (author)
The procedure of damage accumulation in composite materials, especially during fatigue loading, is a complex phenomenon which depends on a number of parameters such as ply orientation, material properties, geometrical non-linearities etc. Towards condition based health monitoring and decision making, the need not only for diagnostic but also for...
abstract 2016
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Loutas, T. (author), Eleftheroglou, N. (author)
A prognostic framework is proposed in order to estimate the remaining useful life of composite materials under fatigue loading based on acoustic emission data and a sophisticated Non Homogenous Hidden Semi Markov Model. Bayesian neural networks are also utilized as an alternative machine learning technique for the non-linear regression task. A...
conference paper 2016
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Wiwattananon, P. (author)
Smart actuators, made of smart materials, are becoming more attractive in many applications because smart materials are not subjected to wear and does not require lubrication during services. Piezoelectric materials are a group of the many attractive smart materials that are being investigated for many applications today. Piezoelectric materials...
doctoral thesis 2013
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Pahlavan, L. (author)
In order for the increased use of fiber-reinforced composite structures to be financially feasible, employment of reliable and economical systems to detect damage and evaluate structural integrity is necessary. This task has traditionally been performed using off-line non-destructive testing (NDT) techniques. Safety enhancement programs and cost...
doctoral thesis 2012
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Kassapoglou, C. (author)
The increased use of advanced composite materials on primary aircraft structure has brought back to the forefront the question of how such structures perform under repeated loading. In particular, when damage or other stress risers are present, tests have shown that the load to cause failure after a given number of cycles is a decreasing...
doctoral thesis 2012
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Voogd-Claessen, H. (author), Van Bladel, C. (author), Van Daalen, T. (author), Dekkers, B. (author), Elwick, R. (author), Mulder, F. (author), Nachmany, G. (author)
Rowing is a sport which requires a proper technique, strong core balance, physical strength and endurance. Rowing boats designed for competition are built of epoxy laminate with glass or carbon reinforcement; they are lightweight, stiff, long, and narrow to achieve minimal water resistance. However, this makes them extremely unstable and...
journal article 2010
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De Haan, Y.M. (author), Sluimers, G.M. (author)
Vibrations in building structures are almost always undesirable. Whether in the form of low frequency oscillations, or droning of the structure, or as audible noise, they may effect the comfort of the user. They may even effect the safety and the integrity of (parts of) the structure. Damping of mechanical vibrations has always been a point of...
journal article 2001
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Poon, C. (author)
This report describes the determination of empirical parameters for a fracture model which can be used to predict the uniaxial tensile strength of composite laminates containing notches of various sizes. The parameters required are the characteristic dimension and the unnotched tensile strength of the subject laminate. A data base including...
report 1991
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Lameris, J. (author)
In the full scale durability and damage tolerance tests of composite aircraft structures, the US and European certification requirements demand among other things that the number of cycles applied are statistically significant and that the influence of the environment has been taken into account. Several certification methods are described which...
report 1990
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Olthoff, J. (author)
This report provides an inventory of computer programs for composite materials which are owned by or known to the members of the NFK-TVK action group. The programs are divided in four groups: general laminate theory; specific laminate problems; general (F.E.) analysis programs; miscellaneous problems. The programs are not discussed in the report...
report 1990
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Schijve, J. (author)
Paper presented at the 16th ICAP Conference, Brussels, 14 and 15 May 1979.
report 1979
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van den Assem, D. (author), Daniels, D.H.W. (author)
report 1978
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Bartelds, G. (author)
report 1978
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't Hart, W.G.J. (author)
Residual strength tests have been carried out on various Kevlar 49-Carbon epoxy laminate configurations consisting of a carbon/epoxy core with face sheets of Kevlar 49 fabric. The influence of fatigue loading of notched specimens on the residual strength was investigated.
report 1978
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