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Romarís Villanueva, Javier (author), Kassapoglou, C. (author)Strain energy release rate calculations for various cases of delaminations emanating from matrix cracks are developed and used to predict the onset of delaminations and their growth size as a function of applied tension and shear loads in composite laminates. The method determines the matrix crack spacing, the delamination onset load, the...journal article 2024
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Kassapoglou, C. (author)An approach to determine the specific energy dissipated during cyclic loading of metal alloys with load ratios between 0 and 1 is developed. The dissipated energy per cycle is determined by using a limiting procedure to obtain the area enclosed between successive loading and unloading curves and can be used for low-, medium-, and high-cycle...journal article 2023
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Huo, L. (author), Kassapoglou, C. (author), Alderliesten, R.C. (author)To improve current design approaches for composite structures, it is required to further investigate the damage interaction effects of composite materials under multiple out-of-plane concentrated loads. It is first necessary to comprehend the dependence of the effective delamination threshold, which describes whether a delamination grows on pre...journal article 2023
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Schuurman, M.J. (author), De Breuker, R. (author), Kassapoglou, C. (author)On the 15t hof December 1965 the motion picture “Flight of the Phoenix” was released in the United States of America theatres. In the closing movie credits the following text is shown:It should be remembered. . . that Paul Mantz, a fine man and a brilliant flyer gave his life in the making of this film. Who was Paul Mantz? What happened? And...conference paper 2022
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Huo, L. (author), Kassapoglou, C. (author), Alderliesten, R.C. (author)To develop a simplified and physically sound delamination-failure criterion, this paper reports a joint experimental and numerical study in which out-of-plane quasi-static indentations with different indentation forces were applied to the centre of fully clamped rectangular carbon fibre-reinforced polymer (CFRP) laminates. The results show that...journal article 2022
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Huijer, A.J. (author), Zhang, X. (author), Kassapoglou, C. (author), Pahlavan, Lotfollah (author)Marine propellers made of fibre-reinforced composites have demonstrated the potential to outperform metallic propellers in terms of efficiency and under-water noise radiation. For full realisation of this potential in a tailored design process with realistic constraints, accurate information on the hydrodynamic loads acting on composite...journal article 2022
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van Hoorn, N. (author), Kassapoglou, C. (author), Turteltaub, S.R. (author), van den Brink, Wouter (author)Impact experiments of thick fabric carbon/epoxy laminate specimens, with small thickness ratio, are conducted at distinct energy levels and thicknesses to characterise the damage process. These specimens and loading conditions are representative of a new generation of critical structural components in aviation, such as wing spars, landing...journal article 2022
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Huijer, A.J. (author), Kassapoglou, C. (author), Pahlavan, Lotfollah (author)The recording and processing of acoustic emissions can be used to identify and localise damage mechanisms occurring in engineering structures. In plate-like structures, acoustic emissions propagate through the structure as guided waves. With a measurement location away from the source location, dispersion effects in the guided wave distort...conference paper 2022
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Baar, Simon (author), Pavlov, Leonid (author), Kassapoglou, C. (author)Onset Theory (previously known as Strain Invariant Failure Theory) is a physics-based composite failure criterion attempting to predict failure at the level of constituents rather than for a homogenized ply. Applying Onset Theory correctly requires a number of steps. As a starting point for other researchers, a consistent approach is...journal article 2022
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Socci, Carlo Alberto (author), Kassapoglou, C. (author)The effect of matrix and fibre cracks on the static strength and stiffness of uni-directional plies and cross-ply laminates under tensile loads was examined with the goal of understanding the main damage mechanisms. The size of matrix cracks emanating from cracked fibres was determined and found to be in excellent agreement with test results....journal article 2022
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Huijer, A.J. (author), Kassapoglou, C. (author), Pahlavan, Lotfollah (author)Piezoelectric sensors can be embedded in carbon fibre-reinforced plastics (CFRP) for continuous measurement of acoustic emissions (AE) without the sensor being exposed or disrupting hydro- or aerodynamics. Insights into the sensitivity of the embedded sensor are essential for accurate identification of AE sources. Embedded sensors are considered...journal article 2021
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Rajpal, D. (author), Mitrotta, F.M.A. (author), Socci, C.A.M. (author), Sodja, J. (author), Kassapoglou, C. (author), De Breuker, R. (author)The aim of the paper is to experimentally validate a numerical design methodology for optimizing composite wings subject to gust and fatigue loading requirements and to assess the effect of fatigue on the aeroelastic performance of the wing. Traditionally, to account for fatigue in composite design, a knockdown factor on the maximum stress...journal article 2021
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Socci, Carlo Alberto (author), Kassapoglou, C. (author)A model is described which allows the exact calculation of stresses in a cracked ply under combined state of strain. Closed form expressions for the stresses in each ply are combined in an energy density-based criterion to predict crack spacing and the resulting transverse modulus and shear modulus. Inelastic effects due to non-linearities of...journal article 2020
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Massart, Philippe F.R. (author), Dhanisetty, V.S.V. (author), Kassapoglou, C. (author), Verhagen, W.J.C. (author), Curran, R. (author)This paper proposes an analytical model that uses historical damage dimension data to deduce physical impactor characteristics (size and energy) that has caused a certain resulting damage. Maintenance tasks occur in operations due to impact, however the source of the damage caused in the event remains in most cases unknown. Consequently, by...journal article 2020
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Rajpal, D. (author), Kassapoglou, C. (author), De Breuker, R. (author)An analytical model to predict the fatigue life of a composite laminate is formulated. The model calculates stresses in each ply using classical lamination theory, degrades the residual strength using the linear wear-out law and predicts failure based on Tsai Wu failure theory. The cycles to failure are predicted using the updated cycle-by...journal article 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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Schuurman, M.J. (author), Rattanagraikanakorn, B. (author), De Breuker, R. (author), Kassapoglou, C. (author)The introduction of Urban Air Mobility (UAM) vehicles will initiate many new and unique challenges to the current operational airspace environment. Many of these challenges are researched today, and solutions are investigated. The main goal of this ongoing research is to develop a safe and sustainable UAMsystem looking at the design of vehicles...conference paper 2019
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Schmack, T. (author), Morgado Martins Filipe, T.M. (author), Deinzer, G. (author), Kassapoglou, C. (author), Walther, F. (author)The usage of fibre-reinforced composites in automotive body structures is still a rarity. The main goal in body structure development is to design lightweight structures as cost-efficient as possible. This research contributes to the approach of maximal material usage by considering the strength increase of a carbon-epoxy laminate with...journal article 2018
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Spronk, S.W.F. (author), Kersemans, M. (author), De Baerdemaeker, J.C.A. (author), Gilabert, F. A. (author), Sevenois, R.D.B. (author), Garoz, D. (author), Kassapoglou, C. (author), Van Paepegem, W. (author)The results of a low-velocity impact programme on both carbon/epoxy and glass/polyamide-6 composite laminates are compared to the results of quasi-static indentation. Cross-ply and quasi-isotropic stacking sequences are impacted and quasi-static indentation tests are performed up to the same maximum displacement. The response of the laminates...journal article 2018
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Schuurman, M.J. (author), Kassapoglou, C. (author)Historical research is defined as the process of critical inquiry into past events to produce an accurate description and interpretation of those events. While using different information sources an attempt is made to reconstruct what happened during a certain period of time as completely and accurately as possible. The purpose of historical...conference paper 2018
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