Three-dimensional modelling of auxetic sandwich panels for localised impact resistance

By Gabriele Imbalzano, Phuong N. U. Tran, Tuan Duc Ngo, P. V. Lee. 2017

282 citations recorded by the source corpus.

Sandwich panels with auxetic lattice cores confined between metallic facets are proposed for localised impact resistance applications. Their performance under localised impact is numerically studied, considering the rate-dependent effects. The behaviour of the composite structure material at high strain rates is modelled with the Johnson-Cook model. Parametric analyses are conducted to assess the performance of different designs of the hybrid composite structures. The results are compared with monolithic panels of equivalent areal mass and material in terms of deformations and plastic energy dissipation. Design parameters considered for the parametric analyses include the auxetic unit cell effective Poisson’s ratio, thickness of the facet, material properties and radius of the unit cell’s struts. Significant reduction in computational time is achieved by modelling a quarter of the panel, with shell elements for facets and beam elements for the auxetic core. With projectile impacts up to 200 m/s, the auxetic composite panels are found to be able to absorb a similar amount of energy through plastic deformation, while the maximum back facet displacements are reduced up to 56% due to localised densification and plastic deformation of the auxetic core.

Subfields: Civil and Structural Engineering, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/6a5b9f53198a4e8988b1694432f1b4166a01d494

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In Civil and Structural Engineering

1. V. Birman
2. D. Ruan
3. G. Kardomateas

In Materials Chemistry

1. Syed H. Masood
2. D. Ruan
3. V. Birman
4. G. Kardomateas

In Mechanical Engineering

1. Syed H. Masood
2. D. Ruan
3. V. Birman
4. G. Kardomateas

Citations in the corpus

• Compressive properties of 3D printed auxetic structures: experimental and numerical studies (2020, background): “These attractive properties have offered various applications of auxetic structures such as cores for sandwich panels (Imbalzano et al. 2017), smart filters (Alderson et al. 2000), mechanical absorbers (Bezazi and Scarpa 2007), sound absorbers (Scarpa, Bullough, and Lumley 2004), magnetics…”
• Review of Auxetic Materials for Sports Applications: Expanding Options in Comfort and Protection (2018, unknown): “A range of (FEM) parametric studies compared rate-dependent blast resistance performance in military applications [178,179].”
• Nonlinear dynamic response and vibration of sandwich composite plates with negative Poisson’s ratio in auxetic honeycombs (2018, unknown): “[17,18] investigated the three-dimensional modeling of auxetic sandwich panels for localized impact resistance [17] and a numerical study of auxetic composite panels under blast loadings [18].”
• Review of current trends in research and applications of sandwich structures (2018, methodology): “In a recent paper [131] impact resistance of sandwich panels with auxetic lattice core was investigated modelling the response of the material at high strain rates by the Johnson-Cook model.”