Advanced design for lightweight structures: Review and prospects

Braga, Daniel F.O.; Tavares, S.M.O.; Silva, Lucas F. M. da; Moreira, P.M.G.P.; Castro, P.M.S.T. de

doi:10.1016/j.paerosci.2014.03.003

Cited by 107 publications

(43 citation statements)

References 75 publications

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“…Although the damage tolerance allows to design lighter structures as compared with safe‐life or fail‐safe approaches, additional considerations has to be taken into account. Experiments demonstrate that delamination progresses in a fast fashion manner, that means the exponent m, from the Paris law, shown in Equation , is usually high, which implies in a large uncertainty because of a narrow range of strain energy release rate (SERR, ΔG ) for a wide range of delamination growth rate ( da/dN ), where C is a material dependent constant …”

Section: Introductionmentioning

confidence: 99%

Interlaminar crack onset in co‐cured and co‐bonded composite joints under mode I cyclic loading

Shiino

Ramírez

Garpelli

et al. 2018

Fatigue Fract Eng Mat Struct

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Composite joints exhibit different behavior in regard to delamination resistance when dealing with fatigue phenomenon. This research work focuses on an investigation to understand the failure mechanisms on the interfacial strength domain for delamination onset in cocured and cobonded joints. The analysis was based on strain energy release rate versus number of cycles plots that were obtained from fatigue tests in mode I with a stress ratio R = 0.1. The analysis encompassed from the microscopic to mesoscopic level obtained from scanning electron microscopic, and the images processed to extract the most relevant fracture patterns. The main difference between the two technologies was the stress concentration at the crack tip in which the cobonded joint presents a fabric carrier that blunts the adhesive layer, then delaying the delamination. This paper provides important information and guidelines to aid designers in the selection of the best composite joint for high‐performance structural applications.

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Section: Introductionmentioning

confidence: 99%

Interlaminar crack onset in co‐cured and co‐bonded composite joints under mode I cyclic loading

Shiino

Ramírez

Garpelli

et al. 2018

Fatigue Fract Eng Mat Struct

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“…With time, as knowledge about the materials, structural behaviour and manufacturing approaches increased (coupled with the pressure to make more daring multi-MW designs) it became possible to adopt more advanced structural design approaches. The development in light weight structure design is nicely illustrated in a general way by Braga et al (2014) and here we see that an implementation of "smart" structure technology is the anticipated innovation to supersede the current state of the art not only for offshore wind turbine blades, but also in other industries where polymer composites are utilised.…”

Section: General Background For Wt Bladesmentioning

confidence: 81%

Design of Wind Turbine Blades

McGugan

2016

Mare-Wint

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In this section the research program framework for European PhD network MARE-WINT is presented, particularly the technology development work focussing on reliability/maintenance and the models describing multi-body fluid structure interaction for the Rotor Blade structure. In order to give a context for the effort undertaken by the individual researchers this section gives a general background for Wind Turbine blades identifying the trends and issues of importance for these structures as well as concepts for "smarter" blades that address these issues. Rotor Blades as a Common Research TopicIn order to meet its objective of strengthening the fundamental scientific work within the multi-disciplinary engineering field of hydro-aero-mechanical coupling in the wind energy conversion process, the MARE-WINT project was organised as five cross-linked work packages in a common research programme. The first three research work packages focus on the major structural components of the Offshore Wind Turbine; Blade, Drive train, and Support structure. In addition to these independent structure based work packages, there were two consolidating technology based work packages focussing on Reliability and Predictive maintenance, and Fluid-Structure interaction. In this way the goal of integrating multiple disciplines was to be achieved. This concept is visualised in Fig. 2

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“…As knowledge about materials and structures increased, it has now become possible to safely adopt more advanced design philosophies. This general trend to more advanced structural design is described elsewhere [11]. In wind turbine blade design, it is important to take into account different nonlinear effects as described in [12].…”

Section: (E) Structural Design Philosophiesmentioning

confidence: 99%

Damage tolerance and structural monitoring for wind turbine blades

McGugan

Pereira

Sørensen

et al. 2015

Phil. Trans. R. Soc. A.

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The paper proposes a methodology for reliable design and maintenance of wind turbine rotor blades using a condition monitoring approach and a damage tolerance index coupling the material and structure. By improving the understanding of material properties that control damage propagation it will be possible to combine damage tolerant structural design, monitoring systems, inspection techniques and modelling to manage the life cycle of the structures. This will allow an efficient operation of the wind turbine in terms of load alleviation, limited maintenance and repair leading to a more effective exploitation of offshore wind.

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Advanced design for lightweight structures: Review and prospects

Cited by 107 publications

References 75 publications

Interlaminar crack onset in co‐cured and co‐bonded composite joints under mode I cyclic loading

Interlaminar crack onset in co‐cured and co‐bonded composite joints under mode I cyclic loading

Design of Wind Turbine Blades

Damage tolerance and structural monitoring for wind turbine blades

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