Vol.23, No.2, 2023, pp. 147–153
UDC:

In the present work the methodology for a composite plate with Nomex core material modelling is presented at the mesoscale level. The structure investigated consists of face sheet carbon composite plates (2D), mainly for normal stress load, a Nomex honeycomb core (T412 paper with chopped aramid fibres in phenolic matrix, manufactured using expansion process), and carbon composite leading and trailing edges (3D orthotropic composite). It is assumed that the Nomex core mainly carries shear stresses. This material model is further used to perform dynamic (modal) analysis on a composite structure with complex geometry. Comparing the results obtained (for simply supported beam and tested as per ASTM standards) and reported in literature, a good agreement between the proposed material model and experimental results is noted. However, material modelling and geometry modelling using the FEA approach is very tedious and requires relatively demanding computing resources.

Keywords: composite plate, Nomex core, dynamic analysis, mesoscale, dynamic integrity