What question did this study set out to answer?

To establish and validate an experimental and numerical procedure to determine the fatigue threshold and modified Paris law parameters of hydrated human cortical bone under Mode I cyclic loading.

August 14, 2026Journal of the mechanical behavior of biomedical materials/Journal of mechanical behavior of biomedical materialsOpen Access

A suitable procedure for determining the fatigue threshold of human cortical bone tissue under mode I loading

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To establish and validate an experimental and numerical procedure to determine the fatigue threshold and modified Paris law parameters of hydrated human cortical bone under Mode I cyclic loading.
Performed high-cycle displacement-controlled fatigue tests on fresh hydrated human femoral cortical bone samples (N=5) using a double cantilever beam test setup.
Implemented an equivalent crack-length data reduction scheme and formulated a local cohesive zone model to validate the experimental procedure and account for the fatigue threshold.
Determined the modified Paris law coefficients and identified the strain energy release rate threshold below which bone tissue exhibits theoretically infinite fatigue life.
Confirmed that the cohesive zone model effectively matches experimental outcomes, enabling accurate representation of Mode I fatigue behavior in human femoral cortical bone.

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Implication

Biomechanical testing reveals a reliable method to quantify Mode I fatigue thresholds in human cortical bone, indicating improved prediction of microdamage resistance under cyclic loading.

Cite This Study

Dourado et al. (2026) studied this question.

synapsesocial.com/papers/6a7ec707b70b84ec8b913192 https://doi.org/10.1016/j.jmbbm.2026.107590

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Implication

Biomechanical testing reveals a reliable method to quantify Mode I fatigue thresholds in human cortical bone, indicating improved prediction of microdamage resistance under cyclic loading.

A suitable procedure for determining the fatigue threshold of human cortical bone tissue under mode I loading

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Discussion

Implication

Cite This Study

A suitable procedure for determining the fatigue threshold of human cortical bone tissue under mode I loading

Key Points

Discussion

Implication

Cite This Study

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