The Effect of Geometric Parameters on Bending in Soft Actuators: FEM Simulation Yumuşak Aktüatörlerde Geometrik Parametrelerin Bükülmeye Etkisi: FEA Simülasyonu


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Alaca Ö., Selçuk E. N., Akman H., SELBAŞ R.

Journal of the Institute of Science and Technology, cilt.16, sa.2, ss.574-582, 2026 (Scopus, TRDizin)

Özet

Soft pneumatic actuators have attracted considerable attention in recent years due to their flexibility and adaptive motion capabilities. However, existing studies examining the influence of geometric design parameters on mechanical behavior remain limited. In this study, the effects of key design parameters—such as the presence or absence of an internal radius and overall actuator length (105 mm and 139 mm)—on the bending behavior of a hollow-chamber soft pneumatic actuator under different pressure conditions were numerically investigated. The actuator geometry was modeled using Fusion 360, and the hyperelastic properties of the silicone material were defined by the Mooney–Rivlin model. Mechanical analyses were conducted in ANSYS using the Finite Element Method (FEM) for internal pressure levels of 5, 10, and 15 kPa. The results indicate that variations in geometric parameters can significantly affect both the magnitude and pattern of actuator bending. These findings highlight the importance of considering geometric factors in the design and performance optimization of soft pneumatic actuators.