Period: 2020-2023
Partners: Dassault Aviation (topic manager), AMADE (Coordinator), Universidad Carlos III de Madrid, COMPOXI, S.L.
Project manager:
Dr. Emilio V. Gonzalez
Contact: emili.gonzalez@udg.edu
Other AMADE people involved in project: Pere Maimí, Pablo Villarroel, Carlos Sarrado
Partners:
Funding by:
This project has received funding from the Clean Sky 2 Joint Undertaking (JU) under grant agreement No. 886519. The JU receives support from the European Union’s Horizon 2020 research and innovation programme and the Clean Sky 2 JU members other than the Union.
Any dissemination of results/communication activity related to the project must indicate that it reflects only the author’s view and that the JU is not responsible for any use that may be made of the information it contains.
Advanced polymer-based composite materials are included in the set of materials that improve and advance the aviation industry. In this field, it is well known that the main issues of concern are the greenhouse gas emissions and the fuel costs, which are the largest operating expenses for airlines. Therefore, the development of technologies to address these issues has clear economic and environmental benefits.
When composites are to be used in structural components, a design development program is generally initiated during which the performance of the structure is assessed prior to its use. Typically, the process of design starts with the analysis of a large set of simple small specimens and, when sufficient knowledge is acquired at this level, it is changed over to a more complex structure but carrying out fewer tests. This methodology is quite mature and well stablished for static and fatigue loads. However, for intermediate and high dynamic loading conditions, the methods are still under development and often limited to academic research levels, without any type of standardization. In the literature, the effect of not having a standard methodology can be found even at basic material characterization, where often there is no agreement on the trend of the behaviour of the analysed property with regard to the loading rate (or strain rate).
During its service life, aerospace structures can be subjected to a variety of dynamic loading cases. Crash/impact is one of the most concerning case due to its possible disastrous consequences. Impacts on aerospace structures can be produced by the accidental or the deliberate hit of an object into aircraft. Hail stones, bird strikes, runaway debris, tyre fragments or even other fragments from the aircraft structure that could be ejected in case of accident (i.e. uncontained rotor engine failure) are the main examples produced in the aerospace sector. Therefore, it is crucial to understand how the materials used in the aerospace sector behaves under dynamic loadings.
Composite materials may exhibit strain rate effects, therefore robust and industrial dedicated dynamic coupon and element level tests, analysis and modelling methods are then necessary to design and certify composite airframe structures. The analysis tools based on static formulations could be far away of the actual material and structural response, and hence a dedicated methodology is needed for dynamic loading states. This is what the proposed BEDYN project will deal with.
Accordingly, the aim of BEDYN project is to address a methodology (including innovative tests, measurements, and analysis methods) to properly characterize the dynamic behaviour up to rupture of composite structures submitted to a dynamic loading. Different issues will be dealt in BEDYN project:
Sergio Medina defended his PhD thesis entitled “Methodology for the experimental characterisation of mode I delamination under different loading rates” on November 25, 2022, at the Polytechnic School of the University of Girona. The PhD thesis has been supervised by......
Researchers of AMADE have participated in the 20th European Conference on Composite Materials (ECCM20), held in Lausanne, Switzerland, on June 26-30, 2022. AMADE members have contributed with four oral presentations on composite materials. Firstly, the following talk was given on......
The PhD student Pablo Martín Villarroel Marquina defended his sophomore dissertation entitled “Numerical modelling and experimental behaviour of delamination and adhesive joints under dynamic loading” on February 11, 2022. Sophomore dissertations are carried out during the first year of the......
The term minimalism is also used to describe a trend in design and architecture where in the subject is reduced to its necessary elements. Minimalist design has been highly influenced by Japanese traditional design and architecture. In addition, the work of De Stijl artists is a major source of reference for this kind of work....