30 May 2019


Mechanical testing of aerospace materials

To achieve the improvement of mechanical properties of CF materials, the surface of them must be treated before being introduced inside composites matrix. In this framework the deposition of  diamond  particles shell on the carbon fiber surface opens a new way to transform an insulating material as the CF into thermal and conductor one. Nevertheless, to accomplish the latter, it is required an undestanding of interactions between matrix and diamond carbon fiber materials too. In this sense, the mechanical properties of the single composite matrix, as well as diamond/CFRP final compounds,  must be characterized and simulated for anticipating its response in service.

Among the several composite materials employed into aerospace industry, the epoxy resins are used as a matrix due to the large number of components that can react with it to form compsite with a very wide range of properties. Nevertheless, previous  to be implemented as matrix in the diamond/CFRP materials, it is required to understand different aspects of the single composite matrix. Some of them are related to gain insight in the fracture response and the mechanisms underlying failure of epoxy resin under various loading rates for reliable design in the aerospace applications. Once this behaviour has been modelled, the mechanisms involved can be implemented as background of the studies  that must carry out on the B-NCD/CFRP composite materials. Thus an exhaustive and correct comprehension of mechanical properties of such materials can be obtained

Density function theory simulations

The implementation of B-NCD/CFRP materials could produce a remarkable advantage into aerospace industry, so to became the CFRP compounds in a thermal and conductive materials. To carry out this technology, it is  required an accurate characterization of the B-NCD/CF/epoxy resin interfaces as well as the chemical or/and physical mechanisms involved into the adhesion process between both materials. In this sense, the density function theory simulations open a way to determine: i)  the most energetically stable nanostructural interace configuration, ii)  the probability of finding an electron in a determine position considering the neighbouring electrons, it means the  kind of the interactions between C atoms from diamond and O atoms from epoxy resin  and iii) the charge distribution across the boron B-NCD/CF/epoxy interface among others. To simulate these parameters, it is started a way towards the understanding of the phenomenon that are implicated into electrical and thermal behaviour and therefore to design rules that improve them.