Searched for: author:"Benedictus, R."
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Yao, L. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
This paper provides a study on mode I fatigue delamination growth in composite laminates using energy principles. Experimental data has been obtained from fatigue tests conducted on Double Cantilever Beam (DCB) specimens at various stress ratios. A concept of fatigue fracture toughness is proposed to interpret the stress ratio effect in crack...
conference paper 2015
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Ruiz-Ripoll, M.L. (author), Schut, H. (author), Van Dijk, N.H. (author), Alderliesten, R.C. (author), Van der Zwaag, S. (author), Benedictus, R. (author)
We have investigated the evolution of damage during fatigue loading in Al–Cu 2024-T3 alloys using the positron annihilation Doppler Broadening (DB) technique. This technique enables us to monitor in a non destructive way, at the atomic and vacancy level, the formation of deformation defects and their interaction with solute atoms at selected...
conference paper 2011
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Amaral, L. (author), Yao, L. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
This work proposes to treat quasi-static mode I delamination growth of CFRP as a low-cycle fatigue process. To this end, mode I quasi-static and fatigue delamination tests were performed. An average physical Strain Energy Release Rate (SERR), derived from an energy balance, is used to characterize the energy released in crack extension. The...
conference paper 2015
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Ruiz-Ripoll, M.L. (author), Schut, H. (author), Benedictus, R. (author), Van der Zwaag, S. (author), Alderliesten, R.C. (author)
conference paper 2011
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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
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van Kuijk, J.J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
This paper discusses the appropriateness of crack length as a reference dimension for fatigue damage. Current discussion on short crack versus long crack data is still divided between various approaches to model small crack growth. A proper physical explanation of the probable cause of the apparent differences between short crack and long...
journal article 2018
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Usman, M. (author), Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
The effect of temperature on fatigue crack growth in epoxy adhesive bonds was investigated for a range of temperatures from -55 to 80[U+202F]°C. The fatigue crack growth behaviour was characterised using both strain energy release rate (SERR) and by measurements of energy dissipation. It was found that for a given maximum SERR, or a given...
journal article 2018
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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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Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Current prediction methods for growth of disbonds under fatigue loading are generally based on a correlation with either the maximum strain energy release rate (SERR) or the SERR range. This paper highlights some issues with this approach. In particular, it is argued that the maximum SERR or the SERR range alone do not give sufficient...
journal article 2014
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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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Quan, H. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Plastic energy dissipation is inevitable during fatigue crack growth. There have been previous attempts reported in literature to correlate the plastic dissipated energy (dW/dN) to fatigue crack growth rate (da/dN). However, at a given dW/dN, the da/dN changes with the ratio of minimum and maximum loads, known as the stress ratio. This paper...
journal article 2018
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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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Pascoe, J.A. (author), Zarouchas, D. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Current methods for prediction of fatigue crack growth are based on empirical correlations which do not take the crack growth behaviour within a single cycle into account. To improve these prediction methods, more understanding of the physical mechanisms of crack growth is required. In this research the acoustic emission technique was used to...
journal article 2018
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Amaral, L. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
In an attempt to understand quasi-static delamination growth under mixed mode loading conditions from a physics-based perspective, this work first evaluated cracking in isotropic materials. The critical Strain Energy Density (SED) approach is adopted, because physically the onset of crack growth is expected to occur when the energy available...
journal article 2018
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Pascoe, J.A. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
The concept of relating fatigue disbond growth to the strain energy release rate (SERR) is critically examined. It is highlighted that the common practise of using only the maximum SERR or only the SERR range is insufficient to correctly characterize a load cycle. As crack growth requires energy, it is argued that growth should be related to the...
journal article 2014
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Yao, L. (author), Sun, Yi (author), Guo, Licheng (author), Lyu, Xiuqi (author), Zhao, Meiying (author), Jia, Liyong (author), Alderliesten, R.C. (author), Benedictus, R. (author)
Fatigue delamination in multidirectional composite laminates was experimentally investigated in present study. Both the Paris relation and a modified Paris relation (with a new similitude parameter) were employed to interpret fatigue delamination with significant fibre bridging. The results clearly demonstrated that fatigue delamination was...
journal article 2018
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Morinière, F.D. (author), Alderliesten, R.C. (author), Benedictus, R. (author)
An analytical and experimental investigation into the low-velocity behaviour of GLARE Fibre-Metal Laminates (FMLs) has been performed. A quasi-static approach was developed to estimate the perforation energy absorbed between the constituents of GLARE. The analysis considered contact area increase during perforation and strain rate effect on...
journal article 2012
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Zhao, Y. (author), Alderliesten, R.C. (author), Zhou, Zhengong (author), Fang, Guodong (author), Zhang, Jiazhen (author), Benedictus, R. (author)
In general, a finite width correction to stress intensity factor (SIF) is required in the fatigue crack growth. The finite width correction factor can be explained physically from the energy point of view. It is assumed that the finite width correction factor primarily constitutes an energy correction factor, i.e. it corrects the applied load...
journal article 2018
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garcia, C (author), Lotz, T (author), Martinez, M.J. (author), Artemev, A (author), Alderliesten, R.C. (author), Benedictus, R. (author)
journal article 2016
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Sadighi, M. (author), Pärnänen, T. (author), Alderliesten, R.C. (author), Sayeaftabi, M. (author), Benedictus, R. (author)
The impact response of fiber metal laminates (FMLs), has been investigated with experiments and numerical simulations, which is reported in this article. Low-velocity impacts were carried out to study the effects of metal type and thickness within FMLs. Glare5-3/2 laminates with two aluminum layer thicknesses and a similar FML containing...
journal article 2012
Searched for: author:"Benedictus, R."
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