2026/01/21 by Satoru Hashimoto, Yinlai Jiang, Hiroshi Yokoi +1
Engineering · Medicine · #Ankle #Attenuation #Biomechanics #Cadaveric spasm #Diabetic Foot Ulcer Assessment and Management #Foot and Ankle Surgery #Joint (building) #Lower Extremity Biomechanics and Pathologies #Viscoelasticity
paper · pdf · doi:10.1088/1748-3190/ae8597
published in Bioinspiration & Biomimetics 21(4), 046019 (IOP Publishing)
openalex publication_date 2026/07/02 · openalex created_date 2026/07/03 · openalex updated_date 2026/07/28
How skeletal architecture and landing posture shape the immediate post-impact viscoelastic response of the foot remains incompletely understood, in part because cadaveric specimens are ill-suited to repeated impact testing across postures. In this study, we developed an anthropomimetic foot joint structure aimed at replicating the skeletal geometry of the human foot. Using a vertical drop apparatus that simulates landing and a viscoelastic system-identification model, we investigated how skeletal structure and posture modulate the apparent post-impact viscoelastic response. The results show that the multi-jointed anthropomimetic structure exhibited a higher damping ratio than simplified flat and rigid feet. Moreover, ankle dorsiflexion and toe extension systematically shifted the identified parameters, reducing the damping ratio under the tested conditions. Taken together, these findings indicate that an arch-like, multi-jointed skeletal architecture can enhance impact attenuation in an anthropomimetic mechanical foot, and that morphology and passive posture alone can tune the trade-off between attenuation and rebound. The observed trends are qualitatively consistent with reported differences in human landing strategies, and highlight the engineering advantage of anatomically informed skeletal design for achieving tunable impact attenuation through postural adjustment.