Akademik Veri Yönetim Sistemi
MecaNano 2nd General Meeting , Vienna, Avusturya, 1 - 03 Mayıs 2024, ss.19
This study introduces an innovative bioinspired hierarchical composite, crafted to emulate seamless integration of mechanical properties observed in Nature, as seen in systems
like bone and cartilage. Structured at two distinct scales, it consists of a macro-scaled
biocompatible nanocomposite and a micro-scaled coating with a spatial gradient in particle distribution. The macro component, comprising LDPE and PVP-HNT nanocomposite,
forms a tough and ductile interior. In contrast, the micro component, a gradient PVPHNT nanocomposite coating applied in successive layers, significantly enhances mechanical
strength. This design skillfully balances toughness and strength, characteristics often seen
as mutually exclusive.
Mechanical analysis of the composite reveals a locally-tuned elastic modulus, ranging from
0.2 to 78.5 GPa, and a hardness increase from 11 to 381 MPa. Numerical analysis employing
the Finite Element Method demonstrates the ability to control the type of deformation, with
the composite predominantly exhibiting elastic behavior. This suggests that the hierarchical
composite is protected from permanent deformation by fine-tuning the concentration distribution of the gradient coating.
The research represents a significant advance in composite material design, achieving a fine
balance of mechanical properties through its multi-scale structure. The synergy of a tough
macro core with a strength-enhanced micro coating not only mitigates stress concentration but also paves the way for new applications in engineering domains where a balance
of strength and toughness is crucial. As a result, this biocompatible hierarchical composite
stands out as a promising candidate for cutting-edge biomedical and engineering applications