What question did this study set out to answer?

To design and evaluate bioinspired hierarchical-gradient mechanical metastructures that replicate the mechanical transition and fatigue behavior of native tendon-to-bone interfaces.

August 16, 2026Materials & DesignOpen Access

Bioinspired hierarchical-gradient designs for tendon-to-bone interfaces: Continuous and discontinuous fatigue behavior

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Authors

MSMasoud ShirzadPukyong National University JKJuhyun KangPukyong National University JSJi Min SeokKorea Institute of Machinery and Materials

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Implication

Biomechanical engineering study demonstrates enhanced static strength and fatigue life in 3D-printed metastructures, suggesting resilient frameworks for orthopedic implants.

Key Points

To design and evaluate bioinspired hierarchical-gradient mechanical metastructures that replicate the mechanical transition and fatigue behavior of native tendon-to-bone interfaces.
Fabricated 3D-printed hierarchical metastructures integrating intermediate hybrid unit cells to transition Poisson's ratio from negative (tendon) to positive (bone).
Conducted static experimental and computational strain-distribution analyses alongside continuous and discontinuous fatigue loading evaluations.
The optimal architecture increased Young’s modulus by 106.1% and ultimate stress by 28.4% compared to conventional designs by reducing localized stress concentrations.
Continuous fatigue loading showed a 132.9% extension in fatigue life driven by bioinspired auxeticity regulation.
Discontinuous fatigue tests revealed that short resting intervals minimally affected cycles to failure, whereas prolonged intervals significantly accelerated mechanical degradation.

Cite This Study

Shirzad et al. (2026) studied this question.

synapsesocial.com/papers/6a8179cbf2fb91fc834ad1e3 https://doi.org/10.1016/j.matdes.2026.116792

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Implication

Biomechanical engineering study demonstrates enhanced static strength and fatigue life in 3D-printed metastructures, suggesting resilient frameworks for orthopedic implants.

Bioinspired hierarchical-gradient designs for tendon-to-bone interfaces: Continuous and discontinuous fatigue behavior

Discussion

Member takes

Implication

Key Points

Cite This Study

Bioinspired hierarchical-gradient designs for tendon-to-bone interfaces: Continuous and discontinuous fatigue behavior

Discussion

Member takes

Implication

Key Points

Cite This Study

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