A auxetic metamaterial structure: analysis of shear and bending, mechanical characterization
Mohammad Anas Khan, Shafahat Ali, Mamoun Alshihabi, Ibrahim Deiab · Emerald · 2026
Auxetic (negative Poisson’s ratio) re-entrant unit-cell designs integrated into bone screws improved load-bearing capacity and deformation resistance under shear and bending versus conventional screws.
Plain English summary
Why this matters
Key findings
- Auxetic bone screws with re-entrant triangular unit cells showed superior mechanical performance compared to conventional screws.
- Auxetic designs increased load-bearing capacity and deformation resistance under shear and bending loads.
- Lateral expansion during loading increased contact with surrounding bone, helping reduce loosening likelihood.
- Unit-cell arrangement and geometry significantly affected performance, with optimized designs performing best.
Limitations
The abstract does not specify biological performance (e.g., osseointegration), long-term loosening outcomes, fatigue/durability beyond the reported tests, or patient-specific validation; it focuses on mechanical testing and design comparison.
Publication
- Publisher
- Emerald
- Publication date
- March 12, 2026
- Research type
- Paper
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