Modelling of dynamic flexural response of composite eco-structure beams using a 3D elastic&-plastic damage model Articles uri icon

publication date

  • July 2025

start page

  • 1

end page

  • 22

issue

  • 119119

volume

  • 364

International Standard Serial Number (ISSN)

  • 0263-8223

Electronic International Standard Serial Number (EISSN)

  • 1879-1085

abstract

  • The dynamic flexural behaviour of sandwich beams made of a composite ecos-tructure (plywood and flax/epoxy composite skin) is studied using an explicit 3D numerical model. The model includes a constitutive elastic-plastic behaviour with a plastic potential and its consistency multiplier-based yield stress criteria, a modified 3D-Hashin damage initiation and a strain threshold-based exponential damage evolution model. Experimental tests at different impact energies were carried out to validate the proposed model. The variation of force with time and displacement as well as the velocity-time profile are accurately predicted. The model is able to capture the stiffness degradation, post-peak softening, de-kinking and unloading phase that appear in the force-displacement curve. The validated model is employed to investigate the evolution of inter-and intralaminar damage for different impact energies. The most relevant damage modes are delamination and compressive damage modes (transverse and normal) for the impact energies studied.

subjects

  • Materials science and engineering
  • Mechanical Engineering

keywords

  • plywood; impact composite; eco-structure; damage; finite element model; dynamic bending