Searched for: department:"Aerospace%5C+Structures%5C+%26%5C+Materials"
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Eleftheroglou, N. (author), Zarouchas, D. (author), Loutas, Theodoros (author), Alderliesten, R.C. (author), Benedictus, R. (author)
A novel framework to fuse structural health monitoring (SHM) data from different in-situ monitoring techniques is proposed aiming to develop a hyper-feature towards more effective prognostics. A state-of-the-art Non-Homogenous Hidden Semi Markov Model (NHHSMM) is utilized to model the damage accumulation of composite structures, subjected to...
journal article 2018
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Schuurman, M.J. (author), Saunders, G.N. (author), Rans, C.D. (author)
conference paper 2018
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Lavalette, N.P. (author), Bergsma, O.K. (author), Zarouchas, D. (author), Benedictus, R. (author)
In the context of lightweight structure design for the transportation and robotics industries, new types of composite structures are being developed, in the form of trusses made of fiber-reinforced polymer composite members of small diameter (a few millimeters thick at most). Some concepts of wound trusses can be found in the literature, but...
journal article 2017
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Wang, W. (author), Rans, C.D. (author), Benedictus, R. (author)
This paper proposes an analytical model for predicting the non-symmetric crack growth and accompanying delamination growth in FMLs. The general approach of this model applies Linear Elastic Fracture Mechanics, the principle of superposition, and displacement compatibility based on the understanding of deformation behaviour in eccentrically...
journal article 2017
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Amaral, L. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Due to the lack of fundamental knowledge of the physics behind delamination growth, certification authorities currently require that composite structures in aircraft are designed such that any delamination will not grow. This usually leads to an overdesign of the structure, hampering weight reductions. In real structures, delaminations tend...
journal article 2017
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Viegas Ochôa De Carvalho, Pedro (author), Groves, R.M. (author), Benedictus, R. (author)
Certification is the key step towards the implementation of structural health monitoring (SHM) as part of condition based maintenance programmes of aircraft fleets. That can only be accomplished by demonstration of system performance in multiple scenarios and in a statistically relevant way. This paper describes a fully computational approach...
conference paper 2017
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Yao, L. (author), Sun, Y. (author), Zhao, M (author), Alderliesten, R.C. (author), Benedictus, R. (author)
This paper aims to investigate stress ratio effect on fibre bridging significance in mode I fatigue delamination growth of composite materials. Fatigue resistance curves (R-curves) of different stress ratios are determined and compared with the quasi-static R-curve. The fatigue R-curve of a high stress ratio is similar to the quasi-static...
journal article 2017
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Craps, S. (author), Pinxten, M (author), Saunders, G.N. (author), Leandro Cruz, M. (author), Gaughan, K. (author), Langie, G. (author)
Although there is high degree of agreement on the importance of transversal skills for engineers, employers observe a significant gap between expectations and reality. This paper discusses the need for the development of a framework of professional roles for future engineers and the implementation of dedicated skills education in engineering...
conference paper 2017
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Yao, L. (author), Sun, Y. (author), Alderliesten, R.C. (author), Benedictus, R. (author), Zhao, M (author)
Fibre bridging can significantly enhance delamination resistance making the use of a single Paris resistance curve to determine fatigue crack growth insufficient. An empirical Paris-type relation has been developed in a previous study to take fibre bridging into account in fatigue delamination growth. This relation was developed by correlating...
journal article 2017
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van Campen, J.M.J.F. (author)
There are many process parameters that are important in automated composite manufacturing, starting with the handling of fabrics in the preforming process. Characterization of fabrics on their preforming qualities – which will be referred to as drapability in this paper – is necessary to tune the manufacturing process. The location where the...
conference paper 2017
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Zhao, T. (author), Palardy, G. (author), Fernandez Villegas, I. (author), Benedictus, R. (author)
Ultrasonic welding is a promising assembly technique for thermoplastic composites and it is well-suited for spot welding. In this study, two typical welding process control strategies, i.e. displacement-controlled and energy-controlled welding, were selected to manufacture spot-welded joints. The influence of different boundary conditions,...
conference paper 2017
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Motta Dias, M.H. (author), Jansen, K.M.B. (author), Luinge, J.W. (author), Bersee, H.E.N. (author), Benedictus, R. (author)
The influence of fiber-matrix adhesion on the linear viscoelastic creep behavior of ‘as received’ and ‘surface modified’ carbon fibers (AR-CF and SM-CF, respectively) reinforced polyphenylene sulfide (PPS) composite materials was investigated. Short-term tensile creep tests were performed on ±45° specimens under six different isothermal...
journal article 2016
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Van der Zwaag, S. (author), Zhang, S. (author), Fang, H. (author), Bruck, E. (author), Van Dijk, N.H. (author)
We report the main findings of our work on the behaviour of binary Fe-Cu and Fe-Au model alloys designed to explore routes to create new creep resistant steels having an in-built ability to autonomously fill creep induced porosity at grain boundaries. The alloying elements were selected on the basis of their ability to be brought in...
conference paper 2016
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Vita, F. (author), Hegde, M. (author), Portale, G. (author), Bras, W. (author), Ferrero, C. (author), Samulski, E.T. (author), Francescangeli, O. (author), Dingemans, T. (author)
We report the structural characterization of the nematic phase of 2,6-biphenyl naphthalene (PPNPP). This lath-like all-aromatic mesogen provides a valuable benchmark for classical theories of nematic order. PPNPP exhibits a very high temperature nematic phase (417–489 °C) above an enantiotropic smectic A phase. X-ray diffraction reveals a...
journal article 2016
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Lu, Q. (author), Xu, W. (author), Van der Zwaag, S. (author)
We report a computational 'alloy by design' approach which can significantly accelerate the design process and substantially reduce the development costs. This approach allows simultaneously optimization of alloy composition and heat treatment parameters based on the integration of thermodynamic, thermo-kinetics and a genetic algorithm...
conference paper 2016
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Zhao, T. (author), Palardy, G. (author), Fernandez Villegas, I. (author), Rans, C.D. (author), Martinez, M.J. (author), Benedictus, R. (author)
The in-plane and out-of-plane mechanical behaviour of both ultrasonically spot-welded and mechanically fastened joints was investigated by double-lap shear and pull-through tests, respectively. Spot-welded specimens showed comparable onset failure load and significantly higher joint stiffness compared to mechanical fasteners when carrying shear...
journal article 2016
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Zhao, T. (author), Palardy, G. (author), Rans, C.D. (author), Benedictus, R. (author)
Ultrasonic welding is a promising assembly technique for thermoplastic composites and it is well-suited for spot welding. In this paper, the in-plane and out-of-plane mechanical behaviour of ultrasonically spot-welded and mechanically fastened joints are investigated by double-lap shear and pull-through tests, respectively. Special attention was...
conference paper 2016
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Viegas Ochôa De Carvalho, Pedro (author), Fernandez Villegas, I. (author), Groves, R.M. (author), Benedictus, R. (author)
Ultrasonic welding is a very promising technique for joining thermoplastic composite (TpC) components in aircraft primary structures [1, 2]. The potential introduction of new lightweight structures in civil aviation has been driving the change towards condition-based maintenance (CBM) as an alternative to the regular inspection interval approach...
abstract 2016
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Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
The available models for the prediction of fatigue crack growth in adhesive bonds rely on the similitude principle. In most cases, one of three similitude parameters based on the strain energy release rate (SERR) is used; i.e. Gmax, (Δ√G)2, or ΔG. In all cases it is usually observed that keeping the similitude parameter...
journal article 2016
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Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Measurement of the energy dissipation during fatigue crack growth is used as a technique to gain more insight into the physics of the crack growth process. It is shown that the amount of energy dissipation required per unit of crack growth is determined by Gmax, whereas the total amount of energy available for crack growth in a single cycle is...
conference paper 2016
Searched for: department:"Aerospace%5C+Structures%5C+%26%5C+Materials"
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